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source: palm/trunk/SOURCE/wind_turbine_model_mod.f90 @ 4456

Last change on this file since 4456 was 4447, checked in by oliver.maas, 4 years ago
renamed wind_turbine_parameters namelist variables
Property svn:keywords set to `Id`
File size: 145.9 KB

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1	!> @file wind_turbine_model_mod.f90
2	!------------------------------------------------------------------------------!
3	! This file is part of the PALM model system.
4	!
5	! PALM is free software: you can redistribute it and/or modify it under the
6	! terms of the GNU General Public License as published by the Free Software
7	! Foundation, either version 3 of the License, or (at your option) any later
8	! version.
9	!
10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANYr
11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13	!
14	! You should have received a copy of the GNU General Public License along with
15	! PALM. If not, see <http://www.gnu.org/licenses/>.
16	!
17	! Copyright 2009-2019 Carl von Ossietzky Universitaet Oldenburg
18	! Copyright 1997-2020 Leibniz Universitaet Hannover
19	!------------------------------------------------------------------------------!
20	!
21	! Current revisions:
22	! -----------------
23	!
24	!
25	! Former revisions:
26	! -----------------
27	! $Id: wind_turbine_model_mod.f90 4447 2020-03-06 11:05:30Z knoop $
28	! renamed wind_turbine_parameters namelist variables
29	!
30	! 4438 2020-03-03 20:49:28Z suehring
31	! Bugfix: shifted netcdf preprocessor directive to correct position
32	!
33	! 4436 2020-03-03 12:47:02Z oliver.maas
34	! added optional netcdf data input for wtm array input parameters
35	!
36	! 4426 2020-02-27 10:02:19Z oliver.maas
37	! define time as unlimited dimension so that no maximum number
38	! of time steps has to be given for wtm_data_output
39	!
40	! 4423 2020-02-25 07:17:11Z maronga
41	! Switched to serial output as data is aggerated before anyway.
42	!
43	! 4420 2020-02-24 14:13:56Z maronga
44	! Added output control for wind turbine model
45	!
46	! 4412 2020-02-19 14:53:13Z maronga
47	! Bugfix: corrected character length in dimension_names
48	!
49	! 4411 2020-02-18 14:28:02Z maronga
50	! Added output in NetCDF format using DOM (only netcdf4-parallel is supported).
51	! Old ASCII output is still available at the moment.
52	!
53	! 4360 2020-01-07 11:25:50Z suehring
54	! Introduction of wall_flags_total_0, which currently sets bits based on static
55	! topography information used in wall_flags_static_0
56	!
57	! 4343 2019-12-17 12:26:12Z oliver.maas
58	! replaced <= by < in line 1464 to ensure that ialpha will not be
59	! greater than dlen
60	!
61	! 4329 2019-12-10 15:46:36Z motisi
62	! Renamed wall_flags_0 to wall_flags_static_0
63	!
64	! 4326 2019-12-06 14:16:14Z oliver.maas
65	! changed format of turbine control output to allow for higher
66	! torque and power values
67	!
68	! 4182 2019-08-22 15:20:23Z scharf
69	! Corrected "Former revisions" section
70	!
71	! 4144 2019-08-06 09:11:47Z raasch
72	! relational operators .EQ., .NE., etc. replaced by ==, /=, etc.
73	!
74	! 4056 2019-06-27 13:53:16Z Giersch
75	! CASE DEFAULT action in wtm_actions needs to be CONTINUE. Otherwise an abort
76	! will happen for location values that are not implemented as CASE statements
77	! but are already realized in the code (e.g. pt-tendency)
78	!
79	! 3885 2019-04-11 11:29:34Z kanani
80	! Changes related to global restructuring of location messages and introduction
81	! of additional debug messages
82	!
83	! 3875 2019-04-08 17:35:12Z knoop
84	! Addaped wtm_tendency to fit the module actions interface
85	!
86	! 3832 2019-03-28 13:16:58Z raasch
87	! instrumented with openmp directives
88	!
89	! 3725 2019-02-07 10:11:02Z raasch
90	! unused variables removed
91	!
92	! 3685 2019-01-21 01:02:11Z knoop
93	! Some interface calls moved to module_interface + cleanup
94	!
95	! 3655 2019-01-07 16:51:22Z knoop
96	! Replace degree symbol by 'degrees'
97	!
98	! 1914 2016-05-26 14:44:07Z witha
99	! Initial revision
100	!
101	!
102	! Description:
103	! ------------
104	!> This module calculates the effect of wind turbines on the flow fields. The
105	!> initial version contains only the advanced actuator disk with rotation method
106	!> (ADM-R).
107	!> The wind turbines include the tower effect, can be yawed and tilted.
108	!> The wind turbine model includes controllers for rotational speed, pitch and
109	!> yaw.
110	!> Currently some specifications of the NREL 5 MW reference turbine
111	!> are hardcoded whereas most input data comes from separate files (currently
112	!> external, planned to be included as namelist which will be read in
113	!> automatically).
114	!>
115	!> @todo Replace dz(1) appropriatly to account for grid stretching
116	!> @todo Revise code according to PALM Coding Standard
117	!> @todo Implement ADM and ALM turbine models
118	!> @todo Generate header information
119	!> @todo Implement further parameter checks and error messages
120	!> @todo Revise and add code documentation
121	!> @todo Output turbine parameters as timeseries
122	!> @todo Include additional output variables
123	!> @todo Revise smearing the forces for turbines in yaw
124	!> @todo Revise nacelle and tower parameterization
125	!> @todo Allow different turbine types in one simulation
126	!
127	!------------------------------------------------------------------------------!
128	MODULE wind_turbine_model_mod
129
130	USE arrays_3d, &
131	ONLY: tend, u, v, w, zu, zw
132
133	USE basic_constants_and_equations_mod, &
134	ONLY: pi
135
136	USE control_parameters, &
137	ONLY: coupling_char, &
138	debug_output, &
139	dt_3d, dz, end_time, message_string, time_since_reference_point,&
140	wind_turbine, initializing_actions, origin_date_time
141
142	USE cpulog, &
143	ONLY: cpu_log, log_point_s
144
145	USE data_output_module
146
147	USE grid_variables, &
148	ONLY: ddx, dx, ddy, dy
149
150	USE indices, &
151	ONLY: nbgp, nx, nxl, nxlg, nxr, nxrg, ny, nyn, nyng, nys, nysg, nz, &
152	nzb, nzt, wall_flags_total_0
153
154	USE kinds
155
156	USE netcdf_data_input_mod, &
157	ONLY: check_existence, &
158	close_input_file, &
159	get_variable, &
160	input_pids_wtm, &
161	inquire_num_variables, &
162	inquire_variable_names, &
163	input_file_wtm, &
164	num_var_pids, &
165	open_read_file, &
166	pids_id, &
167	vars_pids
168
169	USE pegrid
170
171
172	IMPLICIT NONE
173
174	PRIVATE
175
176
177
178	CHARACTER(LEN=100) :: variable_name !< name of output variable
179	CHARACTER(LEN=30) :: nc_filename
180
181	!
182	!-- Variables specified in the namelist wind_turbine_par
183
184	INTEGER(iwp) :: n_airfoils = 8 !< number of airfoils of the used turbine model (for ADM-R and ALM)
185	INTEGER(iwp) :: n_turbines = 1 !< number of turbines
186
187
188
189	REAL(wp), DIMENSION(:), POINTER :: output_values_1d_pointer !< pointer for 2d output array
190	REAL(wp), POINTER :: output_values_0d_pointer !< pointer for 2d output array
191	REAL(wp), DIMENSION(:), ALLOCATABLE, TARGET :: output_values_1d_target !< pointer for 2d output array
192	REAL(wp), TARGET :: output_values_0d_target !< pointer for 2d output array
193
194	LOGICAL :: pitch_control = .FALSE. !< switch for use of pitch controller
195	LOGICAL :: speed_control = .FALSE. !< switch for use of speed controller
196	LOGICAL :: yaw_control = .FALSE. !< switch for use of yaw controller
197	LOGICAL :: tip_loss_correction = .FALSE. !< switch for use of tip loss correct.
198
199	LOGICAL :: initial_write_coordinates = .FALSE.
200
201	REAL(wp) :: dt_data_output_wtm = 0.0_wp !< data output interval
202	REAL(wp) :: time_wtm = 0.0_wp !< time since last data output
203
204
205	REAL(wp) :: segment_length_tangential = 1.0_wp !< length of the segments, the rotor area is divided into
206	!< (in tangential direction, as factor of MIN(dx,dy,dz))
207	REAL(wp) :: segment_width_radial = 0.5_wp !< width of the segments, the rotor area is divided into
208	!< (in radial direction, as factor of MIN(dx,dy,dz))
209	REAL(wp) :: time_turbine_on = 0.0_wp !< time at which turbines are started
210	REAL(wp) :: tilt_angle = 0.0_wp !< vertical tilt_angle of the rotor [degree] ( positive = backwards )
211
212
213	REAL(wp), DIMENSION(1:100) :: tower_diameter = 0.0_wp !< tower diameter [m]
214	REAL(wp), DIMENSION(1:100), TARGET :: rotor_speed = 0.9_wp !< inital or constant rotor speed [rad/s]
215	REAL(wp), DIMENSION(1:100) :: yaw_angle = 0.0_wp !< yaw angle [degree] ( clockwise, 0 = facing west )
216	REAL(wp), DIMENSION(1:100) :: pitch_angle = 0.0_wp !< constant pitch angle
217	REAL(wp), DIMENSION(1:100) :: hub_x = 9999999.9_wp !< position of hub in x-direction
218	REAL(wp), DIMENSION(1:100) :: hub_y = 9999999.9_wp !< position of hub in y-direction
219	REAL(wp), DIMENSION(1:100) :: hub_z = 9999999.9_wp !< position of hub in z-direction
220	REAL(wp), DIMENSION(1:100) :: nacelle_radius = 0.0_wp !< nacelle diameter [m]
221	REAL(wp), DIMENSION(1:100) :: rotor_radius = 63.0_wp !< rotor radius [m]
222	! REAL(wp), DIMENSION(1:100) :: nacelle_cd = 0.85_wp !< drag coefficient for nacelle
223	REAL(wp), DIMENSION(1:100) :: tower_cd = 1.2_wp !< drag coefficient for tower
224
225	!
226	!-- Variables specified in the namelist for speed controller
227	!-- Default values are from the NREL 5MW research turbine (Jonkman, 2008)
228
229	REAL(wp) :: generator_power_rated = 5296610.0_wp !< rated turbine power [W]
230	REAL(wp) :: gear_ratio = 97.0_wp !< Gear ratio from rotor to generator
231	REAL(wp) :: rotor_inertia = 34784179.0_wp !< Inertia of the rotor [kg*m2]
232	REAL(wp) :: generator_inertia = 534.116_wp !< Inertia of the generator [kg*m2]
233	REAL(wp) :: generator_efficiency = 0.944_wp !< Electric efficiency of the generator
234	REAL(wp) :: gear_efficiency = 1.0_wp !< Loss between rotor and generator
235	REAL(wp) :: air_density = 1.225_wp !< Air density to convert to W [kg/m3]
236	REAL(wp) :: generator_speed_rated = 121.6805_wp !< Rated generator speed [rad/s]
237	REAL(wp) :: generator_torque_max = 47402.91_wp !< Maximum of the generator torque [Nm]
238	REAL(wp) :: region_2_slope = 2.332287_wp !< Slope constant for region 2
239	REAL(wp) :: region_2_min = 91.21091_wp !< Lower generator speed boundary of region 2 [rad/s]
240	REAL(wp) :: region_15_min = 70.16224_wp !< Lower generator speed boundary of region 1.5 [rad/s]
241	REAL(wp) :: generator_torque_rate_max = 15000.0_wp !< Max generator torque increase [Nm/s]
242	REAL(wp) :: pitch_rate = 8.0_wp !< Max pitch rate [degree/s]
243
244
245	!
246	!-- Variables specified in the namelist for yaw control
247
248	REAL(wp) :: yaw_speed = 0.005236_wp !< speed of the yaw actuator [rad/s]
249	REAL(wp) :: yaw_misalignment_max = 0.08726_wp !< maximum tolerated yaw missalignment [rad]
250	REAL(wp) :: yaw_misalignment_min = 0.008726_wp !< minimum yaw missalignment for which the actuator stops [rad]
251
252	!
253	!-- Set flag for output files TURBINE_PARAMETERS
254	TYPE file_status
255	LOGICAL :: opened, opened_before
256	END TYPE file_status
257
258	TYPE(file_status), DIMENSION(500) :: openfile_turb_mod = &
259	file_status(.FALSE.,.FALSE.)
260
261	!
262	!-- Variables for initialization of the turbine model
263
264	INTEGER(iwp) :: inot !< turbine loop index (turbine id)
265	INTEGER(iwp) :: nsegs_max !< maximum number of segments (all turbines, required for allocation of arrays)
266	INTEGER(iwp) :: nrings_max !< maximum number of rings (all turbines, required for allocation of arrays)
267	INTEGER(iwp) :: ring !< ring loop index (ring number)
268	INTEGER(iwp) :: upper_end !<
269
270	INTEGER(iwp), DIMENSION(1) :: lct !<
271
272	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: i_hub !< index belonging to x-position of the turbine
273	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: i_smear !< index defining the area for the smearing of the forces (x-direction)
274	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: j_hub !< index belonging to y-position of the turbine
275	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: j_smear !< index defining the area for the smearing of the forces (y-direction)
276	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: k_hub !< index belonging to hub height
277	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: k_smear !< index defining the area for the smearing of the forces (z-direction)
278	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nrings !< number of rings per turbine
279	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: nsegs_total !< total number of segments per turbine
280
281	INTEGER(iwp), DIMENSION(:,:), ALLOCATABLE :: nsegs !< number of segments per ring and turbine
282
283	!
284	!- parameters for the smearing from the rotor to the cartesian grid
285	REAL(wp) :: pol_a !< parameter for the polynomial smearing fct
286	REAL(wp) :: pol_b !< parameter for the polynomial smearing fct
287	REAL(wp) :: delta_t_factor !<
288	REAL(wp) :: eps_factor !<
289	REAL(wp) :: eps_min !<
290	REAL(wp) :: eps_min2 !<
291
292	!
293	!-- Variables for the calculation of lift and drag coefficients
294	REAL(wp), DIMENSION(:), ALLOCATABLE :: ard !<
295	REAL(wp), DIMENSION(:), ALLOCATABLE :: crd !<
296	REAL(wp), DIMENSION(:), ALLOCATABLE :: delta_r !< radial segment length
297	REAL(wp), DIMENSION(:), ALLOCATABLE :: lrd !<
298
299	REAL(wp) :: accu_cl_cd_tab = 0.1_wp !< Accuracy of the interpolation of
300	!< the lift and drag coeff [deg]
301
302	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cd_tab !< table of the blade drag coefficient
303	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cl_tab !< table of the blade lift coefficient
304
305	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: nac_cd_surf !< 3d field of the tower drag coefficient
306	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: tow_cd_surf !< 3d field of the nacelle drag coefficient
307
308	!
309	!-- Variables for the calculation of the forces
310
311	REAL(wp) :: cur_r !<
312	REAL(wp) :: phi_rotor !<
313	REAL(wp) :: pre_factor !<
314	REAL(wp) :: torque_seg !<
315	REAL(wp) :: u_int_l !<
316	REAL(wp) :: u_int_u !<
317	REAL(wp) :: u_rot !<
318	REAL(wp) :: v_int_l !<
319	REAL(wp) :: v_int_u !<
320	REAL(wp) :: w_int_l !<
321	REAL(wp) :: w_int_u !<
322	!$OMP THREADPRIVATE (cur_r, phi_rotor, pre_factor, torque_seg, u_int_l, u_int_u, u_rot, &
323	!$OMP& v_int_l, v_int_u, w_int_l, w_int_u)
324	!
325	!- Tendencies from the nacelle and tower thrust
326	REAL(wp) :: tend_nac_x = 0.0_wp !<
327	REAL(wp) :: tend_tow_x = 0.0_wp !<
328	REAL(wp) :: tend_nac_y = 0.0_wp !<
329	REAL(wp) :: tend_tow_y = 0.0_wp !<
330	!$OMP THREADPRIVATE (tend_nac_x, tend_tow_x, tend_nac_y, tend_tow_y)
331
332	REAL(wp), DIMENSION(:), ALLOCATABLE :: alpha_attack !<
333	REAL(wp), DIMENSION(:), ALLOCATABLE :: chord !<
334	REAL(wp), DIMENSION(:), ALLOCATABLE :: phi_rel !<
335	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_total !<
336	REAL(wp), DIMENSION(:), ALLOCATABLE :: thrust_rotor !<
337	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl !<
338	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd !<
339	REAL(wp), DIMENSION(:), ALLOCATABLE :: vrel !<
340	REAL(wp), DIMENSION(:), ALLOCATABLE :: vtheta !<
341
342	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rbx, rby, rbz !< coordinates of the blade elements
343	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: rotx, roty, rotz !< normal vectors to the rotor coordinates
344
345	!
346	!- Fields for the interpolation of velocities on the rotor grid
347	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: u_int !<
348	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: u_int_1_l !<
349	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: v_int !<
350	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: v_int_1_l !<
351	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: w_int !<
352	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: w_int_1_l !<
353
354	!
355	!- rotor tendencies on the segments
356	REAL(wp), DIMENSION(:), ALLOCATABLE :: thrust_seg !<
357	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_seg_y !<
358	REAL(wp), DIMENSION(:), ALLOCATABLE :: torque_seg_z !<
359
360	!
361	!- rotor tendencies on the rings
362	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: thrust_ring !<
363	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: torque_ring_y !<
364	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: torque_ring_z !<
365
366	!
367	!- rotor tendencies on rotor grids for all turbines
368	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: thrust !<
369	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: torque_y !<
370	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: torque_z !<
371
372	!
373	!- rotor tendencies on coordinate grid
374	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_x !<
375	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_y !<
376	REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: rot_tend_z !<
377	!
378	!- variables for the rotation of the rotor coordinates
379	REAL(wp), DIMENSION(1:100,1:3,1:3) :: rot_coord_trans !< matrix for rotation of rotor coordinates
380
381	REAL(wp), DIMENSION(1:3) :: rot_eigen_rad !<
382	REAL(wp), DIMENSION(1:3) :: rot_eigen_azi !<
383	REAL(wp), DIMENSION(1:3) :: rot_eigen_nor !<
384	REAL(wp), DIMENSION(1:3) :: re !<
385	REAL(wp), DIMENSION(1:3) :: rea !<
386	REAL(wp), DIMENSION(1:3) :: ren !<
387	REAL(wp), DIMENSION(1:3) :: rote !<
388	REAL(wp), DIMENSION(1:3) :: rota !<
389	REAL(wp), DIMENSION(1:3) :: rotn !<
390
391	!
392	!-- Fixed variables for the speed controller
393
394	LOGICAL :: start_up = .TRUE. !<
395
396	REAL(wp) :: Fcorner !< corner freq for the controller low pass filter
397	REAL(wp) :: region_25_min !< min region 2.5
398	REAL(wp) :: om_rate !< rotor speed change
399	REAL(wp) :: slope15 !< slope in region 1.5
400	REAL(wp) :: region_25_slope !< slope in region 2.5
401	REAL(wp) :: trq_rate !< torque change
402	REAL(wp) :: vs_sysp !<
403	REAL(wp) :: lp_coeff !< coeff for the controller low pass filter
404
405	REAL(wp), DIMENSION(100) :: rotor_speed_l = 0.0_wp !< local rot speed [rad/s]
406
407	!
408	!-- Fixed variables for the yaw controller
409
410	REAL(wp), DIMENSION(:) , ALLOCATABLE :: yawdir !< direction to yaw
411	REAL(wp), DIMENSION(:) , ALLOCATABLE :: yaw_angle_l !< local (cpu) yaw angle
412	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wd30_l !< local (cpu) long running avg of the wd
413	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wd2_l !< local (cpu) short running avg of the wd
414	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wdir !< wind direction at hub
415	REAL(wp), DIMENSION(:) , ALLOCATABLE :: u_inflow !< wind speed at hub
416	REAL(wp), DIMENSION(:) , ALLOCATABLE :: wdir_l !<
417	REAL(wp), DIMENSION(:) , ALLOCATABLE :: u_inflow_l !<
418	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: wd30 !<
419	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: wd2 !<
420	LOGICAL, DIMENSION(1:100) :: doyaw = .FALSE. !<
421	INTEGER(iwp) :: WDLON !<
422	INTEGER(iwp) :: WDSHO !<
423
424	!
425	!-- Variables that have to be saved in the binary file for restarts
426	REAL(wp), DIMENSION(1:100) :: pitch_angle_old = 0.0_wp !< old constant pitch angle
427	REAL(wp), DIMENSION(1:100) :: generator_speed = 0.0_wp !< curr. generator speed
428	REAL(wp), DIMENSION(1:100) :: generator_speed_f = 0.0_wp !< filtered generator speed
429	REAL(wp), DIMENSION(1:100) :: generator_speed_old = 0.0_wp !< last generator speed
430	REAL(wp), DIMENSION(1:100) :: generator_speed_f_old = 0.0_wp !< last filtered generator speed
431	REAL(wp), DIMENSION(1:100) :: torque_gen = 0.0_wp !< generator torque
432	REAL(wp), DIMENSION(1:100) :: torque_gen_old = 0.0_wp !< last generator torque
433
434
435	SAVE
436
437
438	INTERFACE wtm_parin
439	MODULE PROCEDURE wtm_parin
440	END INTERFACE wtm_parin
441
442	INTERFACE wtm_check_parameters
443	MODULE PROCEDURE wtm_check_parameters
444	END INTERFACE wtm_check_parameters
445
446	INTERFACE wtm_data_output
447	MODULE PROCEDURE wtm_data_output
448	END INTERFACE wtm_data_output
449
450	INTERFACE wtm_init_arrays
451	MODULE PROCEDURE wtm_init_arrays
452	END INTERFACE wtm_init_arrays
453
454	INTERFACE wtm_init
455	MODULE PROCEDURE wtm_init
456	END INTERFACE wtm_init
457
458	INTERFACE wtm_init_output
459	MODULE PROCEDURE wtm_init_output
460	END INTERFACE wtm_init_output
461
462	INTERFACE wtm_actions
463	MODULE PROCEDURE wtm_actions
464	MODULE PROCEDURE wtm_actions_ij
465	END INTERFACE wtm_actions
466
467	INTERFACE wtm_rrd_global
468	MODULE PROCEDURE wtm_rrd_global
469	END INTERFACE wtm_rrd_global
470
471	INTERFACE wtm_wrd_global
472	MODULE PROCEDURE wtm_wrd_global
473	END INTERFACE wtm_wrd_global
474
475
476	PUBLIC &
477	dt_data_output_wtm, &
478	time_wtm, &
479	wind_turbine
480
481	PUBLIC &
482	wtm_parin, &
483	wtm_check_parameters, &
484	wtm_data_output, &
485	wtm_init_arrays, &
486	wtm_init_output, &
487	wtm_init, &
488	wtm_actions, &
489	wtm_rrd_global, &
490	wtm_wrd_global
491
492
493	CONTAINS
494
495
496	!------------------------------------------------------------------------------!
497	! Description:
498	! ------------
499	!> Parin for &wind_turbine_par for wind turbine model
500	!------------------------------------------------------------------------------!
501	SUBROUTINE wtm_parin
502
503	IMPLICIT NONE
504
505	CHARACTER (LEN=80) :: line !< dummy string that contains the current line of the parameter file
506
507	NAMELIST /wind_turbine_parameters/ &
508	air_density, tower_diameter, dt_data_output_wtm, &
509	gear_efficiency, gear_ratio, generator_efficiency, &
510	generator_inertia, rotor_inertia, yaw_misalignment_max, &
511	generator_torque_max, generator_torque_rate_max, yaw_misalignment_min, &
512	region_15_min, region_2_min, n_airfoils, n_turbines, &
513	rotor_speed, yaw_angle, pitch_angle, pitch_control, &
514	generator_speed_rated, generator_power_rated, hub_x, hub_y, hub_z,&
515	nacelle_radius, rotor_radius, segment_length_tangential, segment_width_radial, &
516	region_2_slope, speed_control, tilt_angle, time_turbine_on, &
517	tower_cd, pitch_rate, &
518	yaw_control, yaw_speed, tip_loss_correction
519	! , nacelle_cd
520
521	!
522	!-- Try to find wind turbine model package
523	REWIND ( 11 )
524	line = ' '
525	DO WHILE ( INDEX( line, '&wind_turbine_parameters' ) == 0 )
526	READ ( 11, '(A)', END=12 ) line
527	ENDDO
528	BACKSPACE ( 11 )
529
530	!
531	!-- Read user-defined namelist
532	READ ( 11, wind_turbine_parameters, ERR = 10, END = 12 )
533	!
534	!-- Set flag that indicates that the wind turbine model is switched on
535	wind_turbine = .TRUE.
536
537	GOTO 12
538
539	10 BACKSPACE( 11 )
540	READ( 11 , '(A)') line
541	CALL parin_fail_message( 'wind_turbine_parameters', line )
542
543	12 CONTINUE ! TBD Change from continue, mit ierrn machen
544
545	END SUBROUTINE wtm_parin
546
547
548	!------------------------------------------------------------------------------!
549	! Description:
550	! ------------
551	!> This routine writes the respective restart data.
552	!------------------------------------------------------------------------------!
553	SUBROUTINE wtm_wrd_global
554
555
556	IMPLICIT NONE
557
558
559	CALL wrd_write_string( 'generator_speed' )
560	WRITE ( 14 ) generator_speed
561
562	CALL wrd_write_string( 'generator_speed_f' )
563	WRITE ( 14 ) generator_speed_f
564
565	CALL wrd_write_string( 'generator_speed_f_old' )
566	WRITE ( 14 ) generator_speed_f_old
567
568	CALL wrd_write_string( 'generator_speed_old' )
569	WRITE ( 14 ) generator_speed_old
570
571	CALL wrd_write_string( 'rotor_speed' )
572	WRITE ( 14 ) rotor_speed
573
574	CALL wrd_write_string( 'yaw_angle' )
575	WRITE ( 14 ) yaw_angle
576
577	CALL wrd_write_string( 'pitch_angle' )
578	WRITE ( 14 ) pitch_angle
579
580	CALL wrd_write_string( 'pitch_angle_old' )
581	WRITE ( 14 ) pitch_angle_old
582
583	CALL wrd_write_string( 'torque_gen' )
584	WRITE ( 14 ) torque_gen
585
586	CALL wrd_write_string( 'torque_gen_old' )
587	WRITE ( 14 ) torque_gen_old
588
589
590	END SUBROUTINE wtm_wrd_global
591
592
593	!------------------------------------------------------------------------------!
594	! Description:
595	! ------------
596	!> This routine reads the respective restart data.
597	!------------------------------------------------------------------------------!
598	SUBROUTINE wtm_rrd_global( found )
599
600
601	USE control_parameters, &
602	ONLY: length, restart_string
603
604
605	IMPLICIT NONE
606
607	LOGICAL, INTENT(OUT) :: found
608
609
610	found = .TRUE.
611
612
613	SELECT CASE ( restart_string(1:length) )
614
615	CASE ( 'generator_speed' )
616	READ ( 13 ) generator_speed
617	CASE ( 'generator_speed_f' )
618	READ ( 13 ) generator_speed_f
619	CASE ( 'generator_speed_f_old' )
620	READ ( 13 ) generator_speed_f_old
621	CASE ( 'generator_speed_old' )
622	READ ( 13 ) generator_speed_old
623	CASE ( 'rotor_speed' )
624	READ ( 13 ) rotor_speed
625	CASE ( 'yaw_angle' )
626	READ ( 13 ) yaw_angle
627	CASE ( 'pitch_angle' )
628	READ ( 13 ) pitch_angle
629	CASE ( 'pitch_angle_old' )
630	READ ( 13 ) pitch_angle_old
631	CASE ( 'torque_gen' )
632	READ ( 13 ) torque_gen
633	CASE ( 'torque_gen_old' )
634	READ ( 13 ) torque_gen_old
635
636	CASE DEFAULT
637
638	found = .FALSE.
639
640	END SELECT
641
642
643	END SUBROUTINE wtm_rrd_global
644
645
646	!------------------------------------------------------------------------------!
647	! Description:
648	! ------------
649	!> Check namelist parameter
650	!------------------------------------------------------------------------------!
651	SUBROUTINE wtm_check_parameters
652
653	IMPLICIT NONE
654
655	IF ( .NOT. input_pids_wtm ) THEN
656	IF ( ( .NOT.speed_control ) .AND. pitch_control ) THEN
657	message_string = 'pitch_control = .TRUE. requires '// &
658	'speed_control = .TRUE.'
659	CALL message( 'wtm_check_parameters', 'PA0461', 1, 2, 0, 6, 0 )
660	ENDIF
661
662	IF ( ANY( rotor_speed(1:n_turbines) < 0.0 ) ) THEN
663	message_string = 'rotor_speed < 0.0, Please set rotor_speed to ' // &
664	'a value equal or larger than zero'
665	CALL message( 'wtm_check_parameters', 'PA0462', 1, 2, 0, 6, 0 )
666	ENDIF
667
668
669	IF ( ANY( hub_x(1:n_turbines) == 9999999.9_wp ) .OR. &
670	ANY( hub_y(1:n_turbines) == 9999999.9_wp ) .OR. &
671	ANY( hub_z(1:n_turbines) == 9999999.9_wp ) ) THEN
672
673	message_string = 'hub_x, hub_y, hub_z ' // &
674	'have to be given for each turbine.'
675	CALL message( 'wtm_check_parameters', 'PA0463', 1, 2, 0, 6, 0 )
676	ENDIF
677	ENDIF
678
679	END SUBROUTINE wtm_check_parameters
680	!
681
682	!------------------------------------------------------------------------------!
683	! Description:
684	! ------------
685	!> Allocate wind turbine model arrays
686	!------------------------------------------------------------------------------!
687	SUBROUTINE wtm_init_arrays
688
689	IMPLICIT NONE
690
691	REAL(wp) :: delta_r_factor !<
692	REAL(wp) :: delta_r_init !<
693
694	#if defined( __netcdf )
695	!
696	! Read wtm input file (netcdf) if it exists
697	IF ( input_pids_wtm ) THEN
698
699	!
700	!-- Open the wtm input file
701	CALL open_read_file( TRIM( input_file_wtm ) // &
702	TRIM( coupling_char ), pids_id )
703
704	CALL inquire_num_variables( pids_id, num_var_pids )
705
706	!
707	!-- Allocate memory to store variable names and read them
708	ALLOCATE( vars_pids(1:num_var_pids) )
709	CALL inquire_variable_names( pids_id, vars_pids )
710
711	!
712	!-- Input of all wtm parameters
713	IF ( check_existence( vars_pids, 'tower_diameter' ) ) THEN
714	CALL get_variable( pids_id, 'tower_diameter', tower_diameter(1:n_turbines))
715	ENDIF
716
717	IF ( check_existence( vars_pids, 'rotor_speed' ) ) THEN
718	CALL get_variable( pids_id, 'rotor_speed', rotor_speed(1:n_turbines))
719	ENDIF
720
721	IF ( check_existence( vars_pids, 'pitch_angle' ) ) THEN
722	CALL get_variable( pids_id, 'pitch_angle', pitch_angle(1:n_turbines))
723	ENDIF
724
725	IF ( check_existence( vars_pids, 'yaw_angle' ) ) THEN
726	CALL get_variable( pids_id, 'yaw_angle', yaw_angle(1:n_turbines))
727	ENDIF
728
729	IF ( check_existence( vars_pids, 'hub_x' ) ) THEN
730	CALL get_variable( pids_id, 'hub_x', hub_x(1:n_turbines))
731	ENDIF
732
733	IF ( check_existence( vars_pids, 'hub_y' ) ) THEN
734	CALL get_variable( pids_id, 'hub_y', hub_y(1:n_turbines))
735	ENDIF
736
737	IF ( check_existence( vars_pids, 'hub_z' ) ) THEN
738	CALL get_variable( pids_id, 'hub_z', hub_z(1:n_turbines))
739	ENDIF
740
741	IF ( check_existence( vars_pids, 'nacelle_radius' ) ) THEN
742	CALL get_variable( pids_id, 'nacelle_radius', nacelle_radius(1:n_turbines))
743	ENDIF
744
745	IF ( check_existence( vars_pids, 'rotor_radius' ) ) THEN
746	CALL get_variable( pids_id, 'rotor_radius', rotor_radius(1:n_turbines))
747	ENDIF
748	!
749	! IF ( check_existence( vars_pids, 'nacelle_cd' ) ) THEN
750	! CALL get_variable( pids_id, 'nacelle_cd', nacelle_cd(1:n_turbines))
751	! ENDIF
752
753	IF ( check_existence( vars_pids, 'tower_cd' ) ) THEN
754	CALL get_variable( pids_id, 'tower_cd', tower_cd(1:n_turbines))
755	ENDIF
756	!
757	!-- Close wtm input file
758	CALL close_input_file( pids_id )
759
760	ENDIF
761	#endif
762
763	!
764	!-- To be able to allocate arrays with dimension of rotor rings and segments,
765	!-- the maximum possible numbers of rings and segments have to be calculated:
766
767	ALLOCATE( nrings(1:n_turbines) )
768	ALLOCATE( delta_r(1:n_turbines) )
769
770	nrings(:) = 0
771	delta_r(:) = 0.0_wp
772
773	!
774	!-- Thickness (radial) of each ring and length (tangential) of each segment:
775	delta_r_factor = segment_width_radial
776	delta_t_factor = segment_length_tangential
777	delta_r_init = delta_r_factor * MIN( dx, dy, dz(1))
778
779	DO inot = 1, n_turbines
780	!
781	!-- Determine number of rings:
782	nrings(inot) = NINT( rotor_radius(inot) / delta_r_init )
783
784	delta_r(inot) = rotor_radius(inot) / nrings(inot)
785
786	ENDDO
787
788	nrings_max = MAXVAL(nrings)
789
790	ALLOCATE( nsegs(1:nrings_max,1:n_turbines) )
791	ALLOCATE( nsegs_total(1:n_turbines) )
792
793	nsegs(:,:) = 0
794	nsegs_total(:) = 0
795
796
797	DO inot = 1, n_turbines
798	DO ring = 1, nrings(inot)
799	!
800	!-- Determine number of segments for each ring:
801	nsegs(ring,inot) = MAX( 8, CEILING( delta_r_factor * pi * &
802	( 2.0_wp * ring - 1.0_wp ) / &
803	delta_t_factor ) )
804	ENDDO
805	!
806	!-- Total sum of all rotor segments:
807	nsegs_total(inot) = SUM( nsegs(:,inot) )
808
809	ENDDO
810
811	!
812	!-- Maximum number of segments per ring:
813	nsegs_max = MAXVAL(nsegs)
814
815	!!
816	!!-- TODO: Folgendes im Header ausgeben!
817	! IF ( myid == 0 ) THEN
818	! PRINT*, 'nrings(1) = ', nrings(1)
819	! PRINT*, '--------------------------------------------------'
820	! PRINT*, 'nsegs(:,1) = ', nsegs(:,1)
821	! PRINT*, '--------------------------------------------------'
822	! PRINT*, 'nrings_max = ', nrings_max
823	! PRINT*, 'nsegs_max = ', nsegs_max
824	! PRINT*, 'nsegs_total(1) = ', nsegs_total(1)
825	! ENDIF
826
827
828	!
829	!-- Allocate 1D arrays (dimension = number of turbines)
830	ALLOCATE( i_hub(1:n_turbines) )
831	ALLOCATE( i_smear(1:n_turbines) )
832	ALLOCATE( j_hub(1:n_turbines) )
833	ALLOCATE( j_smear(1:n_turbines) )
834	ALLOCATE( k_hub(1:n_turbines) )
835	ALLOCATE( k_smear(1:n_turbines) )
836	ALLOCATE( torque_total(1:n_turbines) )
837	ALLOCATE( thrust_rotor(1:n_turbines) )
838
839	!
840	!-- Allocation of the 1D arrays for yaw control
841	ALLOCATE( yawdir(1:n_turbines) )
842	ALLOCATE( u_inflow(1:n_turbines) )
843	ALLOCATE( wdir(1:n_turbines) )
844	ALLOCATE( u_inflow_l(1:n_turbines) )
845	ALLOCATE( wdir_l(1:n_turbines) )
846	ALLOCATE( yaw_angle_l(1:n_turbines) )
847
848	!
849	!-- Allocate 1D arrays (dimension = number of rotor segments)
850	ALLOCATE( alpha_attack(1:nsegs_max) )
851	ALLOCATE( chord(1:nsegs_max) )
852	ALLOCATE( phi_rel(1:nsegs_max) )
853	ALLOCATE( thrust_seg(1:nsegs_max) )
854	ALLOCATE( torque_seg_y(1:nsegs_max) )
855	ALLOCATE( torque_seg_z(1:nsegs_max) )
856	ALLOCATE( turb_cd(1:nsegs_max) )
857	ALLOCATE( turb_cl(1:nsegs_max) )
858	ALLOCATE( vrel(1:nsegs_max) )
859	ALLOCATE( vtheta(1:nsegs_max) )
860
861	!
862	!-- Allocate 2D arrays (dimension = number of rotor rings and segments)
863	ALLOCATE( rbx(1:nrings_max,1:nsegs_max) )
864	ALLOCATE( rby(1:nrings_max,1:nsegs_max) )
865	ALLOCATE( rbz(1:nrings_max,1:nsegs_max) )
866	ALLOCATE( thrust_ring(1:nrings_max,1:nsegs_max) )
867	ALLOCATE( torque_ring_y(1:nrings_max,1:nsegs_max) )
868	ALLOCATE( torque_ring_z(1:nrings_max,1:nsegs_max) )
869
870	!
871	!-- Allocate additional 2D arrays
872	ALLOCATE( rotx(1:n_turbines,1:3) )
873	ALLOCATE( roty(1:n_turbines,1:3) )
874	ALLOCATE( rotz(1:n_turbines,1:3) )
875
876	!
877	!-- Allocate 3D arrays (dimension = number of grid points)
878	ALLOCATE( nac_cd_surf(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
879	ALLOCATE( rot_tend_x(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
880	ALLOCATE( rot_tend_y(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
881	ALLOCATE( rot_tend_z(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
882	ALLOCATE( thrust(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
883	ALLOCATE( torque_y(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
884	ALLOCATE( torque_z(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
885	ALLOCATE( tow_cd_surf(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
886
887	!
888	!-- Allocate additional 3D arrays
889	ALLOCATE( u_int(1:n_turbines,1:nrings_max,1:nsegs_max) )
890	ALLOCATE( u_int_1_l(1:n_turbines,1:nrings_max,1:nsegs_max) )
891	ALLOCATE( v_int(1:n_turbines,1:nrings_max,1:nsegs_max) )
892	ALLOCATE( v_int_1_l(1:n_turbines,1:nrings_max,1:nsegs_max) )
893	ALLOCATE( w_int(1:n_turbines,1:nrings_max,1:nsegs_max) )
894	ALLOCATE( w_int_1_l(1:n_turbines,1:nrings_max,1:nsegs_max) )
895
896	!
897	!-- All of the arrays are initialized with a value of zero:
898	i_hub(:) = 0
899	i_smear(:) = 0
900	j_hub(:) = 0
901	j_smear(:) = 0
902	k_hub(:) = 0
903	k_smear(:) = 0
904
905	torque_total(:) = 0.0_wp
906	thrust_rotor(:) = 0.0_wp
907
908	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
909	generator_speed(:) = 0.0_wp
910	generator_speed_old(:) = 0.0_wp
911	generator_speed_f(:) = 0.0_wp
912	generator_speed_f_old(:) = 0.0_wp
913	pitch_angle_old(:) = 0.0_wp
914	torque_gen(:) = 0.0_wp
915	torque_gen_old(:) = 0.0_wp
916	ENDIF
917
918	yawdir(:) = 0.0_wp
919	wdir_l(:) = 0.0_wp
920	wdir(:) = 0.0_wp
921	u_inflow(:) = 0.0_wp
922	u_inflow_l(:) = 0.0_wp
923	yaw_angle_l(:) = 0.0_wp
924
925	!
926	!-- Allocate 1D arrays (dimension = number of rotor segments)
927	alpha_attack(:) = 0.0_wp
928	chord(:) = 0.0_wp
929	phi_rel(:) = 0.0_wp
930	thrust_seg(:) = 0.0_wp
931	torque_seg_y(:) = 0.0_wp
932	torque_seg_z(:) = 0.0_wp
933	turb_cd(:) = 0.0_wp
934	turb_cl(:) = 0.0_wp
935	vrel(:) = 0.0_wp
936	vtheta(:) = 0.0_wp
937
938	rbx(:,:) = 0.0_wp
939	rby(:,:) = 0.0_wp
940	rbz(:,:) = 0.0_wp
941	thrust_ring(:,:) = 0.0_wp
942	torque_ring_y(:,:) = 0.0_wp
943	torque_ring_z(:,:) = 0.0_wp
944
945	rotx(:,:) = 0.0_wp
946	roty(:,:) = 0.0_wp
947	rotz(:,:) = 0.0_wp
948
949	nac_cd_surf(:,:,:) = 0.0_wp
950	rot_tend_x(:,:,:) = 0.0_wp
951	rot_tend_y(:,:,:) = 0.0_wp
952	rot_tend_z(:,:,:) = 0.0_wp
953	thrust(:,:,:) = 0.0_wp
954	torque_y(:,:,:) = 0.0_wp
955	torque_z(:,:,:) = 0.0_wp
956	tow_cd_surf(:,:,:) = 0.0_wp
957
958	u_int(:,:,:) = 0.0_wp
959	u_int_1_l(:,:,:) = 0.0_wp
960	v_int(:,:,:) = 0.0_wp
961	v_int_1_l(:,:,:) = 0.0_wp
962	w_int(:,:,:) = 0.0_wp
963	w_int_1_l(:,:,:) = 0.0_wp
964
965
966	END SUBROUTINE wtm_init_arrays
967
968
969	!------------------------------------------------------------------------------!
970	! Description:
971	! ------------
972	!> Initialization of the wind turbine model
973	!------------------------------------------------------------------------------!
974	SUBROUTINE wtm_init
975
976
977	USE control_parameters, &
978	ONLY: dz_stretch_level_start
979
980	IMPLICIT NONE
981
982
983
984	INTEGER(iwp) :: i !< running index
985	INTEGER(iwp) :: j !< running index
986	INTEGER(iwp) :: k !< running index
987
988
989	!
990	!-- Help variables for the smearing function
991	REAL(wp) :: eps_kernel !<
992
993	!
994	!-- Help variables for calculation of the tower drag
995	INTEGER(iwp) :: tower_n !<
996	INTEGER(iwp) :: tower_s !<
997
998	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: circle_points !<
999
1000	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacb !<
1001	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacl !<
1002	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nacr !<
1003	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: index_nact !<
1004
1005	IF ( debug_output ) CALL debug_message( 'wtm_init', 'start' )
1006
1007	ALLOCATE( index_nacb(1:n_turbines) )
1008	ALLOCATE( index_nacl(1:n_turbines) )
1009	ALLOCATE( index_nacr(1:n_turbines) )
1010	ALLOCATE( index_nact(1:n_turbines) )
1011
1012	!
1013	!------------------------------------------------------------------------------!
1014	!-- Calculation of parameters for the regularization kernel
1015	!-- (smearing of the forces)
1016	!------------------------------------------------------------------------------!
1017	!
1018	!-- In the following, some of the required parameters for the smearing will
1019	!-- be calculated:
1020
1021	!-- The kernel is set equal to twice the grid spacing which has turned out to
1022	!-- be a reasonable value (see e.g. Troldborg et al. (2013), Wind Energy,
1023	!-- DOI: 10.1002/we.1608):
1024	eps_kernel = 2.0_wp * dx
1025	!
1026	!-- The zero point (eps_min) of the polynomial function must be the following
1027	!-- if the integral of the polynomial function (for values < eps_min) shall
1028	!-- be equal to the integral of the Gaussian function used before:
1029	eps_min = ( 105.0_wp / 32.0_wp )*( 1.0_wp / 3.0_wp ) &
1030	pi*( 1.0_wp / 6.0_wp ) eps_kernel
1031	!
1032	!-- Stretching (non-uniform grid spacing) is not considered in the wind
1033	!-- turbine model. Therefore, vertical stretching has to be applied above
1034	!-- the area where the wtm is active. ABS (...) is required because the
1035	!-- default value of dz_stretch_level_start is -9999999.9_wp (negative).
1036	IF ( ABS( dz_stretch_level_start(1) ) <= MAXVAL(hub_z(1:n_turbines)) + &
1037	MAXVAL(rotor_radius(1:n_turbines)) + &
1038	eps_min) THEN
1039	WRITE( message_string, * ) 'The lowest level where vertical ', &
1040	'stretching is applied &have to be ', &
1041	'greater than ',MAXVAL(hub_z(1:n_turbines)) &
1042	+ MAXVAL(rotor_radius(1:n_turbines)) + eps_min
1043	CALL message( 'wtm_init', 'PA0484', 1, 2, 0, 6, 0 )
1044	ENDIF
1045	!
1046	!-- Square of eps_min:
1047	eps_min2 = eps_min**2
1048	!
1049	!-- Parameters in the polynomial function:
1050	pol_a = 1.0_wp / eps_min**4
1051	pol_b = 2.0_wp / eps_min**2
1052	!
1053	!-- Normalization factor which is the inverse of the integral of the smearing
1054	!-- function:
1055	eps_factor = 105.0_wp / ( 32.0_wp * pi * eps_min**3 )
1056
1057	!-- Change tilt angle to rad:
1058	tilt_angle = tilt_angle * pi / 180.0_wp
1059
1060	!
1061	!-- Change yaw angle to rad:
1062	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
1063	yaw_angle(:) = yaw_angle(:) * pi / 180.0_wp
1064	ENDIF
1065
1066
1067	DO inot = 1, n_turbines
1068	!
1069	!-- Rotate the rotor coordinates in case yaw and tilt are defined
1070	CALL wtm_rotate_rotor( inot )
1071
1072	!
1073	!-- Determine the indices of the hub height
1074	i_hub(inot) = INT( hub_x(inot) / dx )
1075	j_hub(inot) = INT( ( hub_y(inot) + 0.5_wp * dy ) / dy )
1076	k_hub(inot) = INT( ( hub_z(inot) + 0.5_wp * dz(1) ) / dz(1) )
1077
1078	!
1079	!-- Determining the area to which the smearing of the forces is applied.
1080	!-- As smearing now is effectively applied only for distances smaller than
1081	!-- eps_min, the smearing area can be further limited and regarded as a
1082	!-- function of eps_min:
1083	i_smear(inot) = CEILING( ( rotor_radius(inot) + eps_min ) / dx )
1084	j_smear(inot) = CEILING( ( rotor_radius(inot) + eps_min ) / dy )
1085	k_smear(inot) = CEILING( ( rotor_radius(inot) + eps_min ) / dz(1) )
1086
1087	ENDDO
1088
1089	!
1090	!-- Call the wtm_init_speed_control subroutine and calculate the local
1091	!-- rotor_speed for the respective processor.
1092	IF ( speed_control) THEN
1093
1094	CALL wtm_init_speed_control
1095
1096	IF ( TRIM( initializing_actions ) == 'read_restart_data' ) THEN
1097
1098	DO inot = 1, n_turbines
1099
1100	IF ( nxl > i_hub(inot) ) THEN
1101	torque_gen(inot) = 0.0_wp
1102	generator_speed_f(inot) = 0.0_wp
1103	rotor_speed_l(inot) = 0.0_wp
1104	ENDIF
1105
1106	IF ( nxr < i_hub(inot) ) THEN
1107	torque_gen(inot) = 0.0_wp
1108	generator_speed_f(inot) = 0.0_wp
1109	rotor_speed_l(inot) = 0.0_wp
1110	ENDIF
1111
1112	IF ( nys > j_hub(inot) ) THEN
1113	torque_gen(inot) = 0.0_wp
1114	generator_speed_f(inot) = 0.0_wp
1115	rotor_speed_l(inot) = 0.0_wp
1116	ENDIF
1117
1118	IF ( nyn < j_hub(inot) ) THEN
1119	torque_gen(inot) = 0.0_wp
1120	generator_speed_f(inot) = 0.0_wp
1121	rotor_speed_l(inot) = 0.0_wp
1122	ENDIF
1123
1124	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) THEN
1125	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) ) THEN
1126
1127	rotor_speed_l(inot) = generator_speed(inot) / gear_ratio
1128
1129	ENDIF
1130	ENDIF
1131
1132	END DO
1133
1134	ENDIF
1135
1136	ENDIF
1137
1138	!
1139	!------------------------------------------------------------------------------!
1140	!-- Determine the area within each grid cell that overlaps with the area
1141	!-- of the nacelle and the tower (needed for calculation of the forces)
1142	!------------------------------------------------------------------------------!
1143	!
1144	!-- Note: so far this is only a 2D version, in that the mean flow is
1145	!-- perpendicular to the rotor area.
1146
1147	!
1148	!-- Allocation of the array containing information on the intersection points
1149	!-- between rotor disk and the numerical grid:
1150	upper_end = ( ny + 1 ) * 10000
1151
1152	ALLOCATE( circle_points(1:2,1:upper_end) )
1153
1154	circle_points(:,:) = 0.0_wp
1155
1156
1157	DO inot = 1, n_turbines ! loop over number of turbines
1158	!
1159	!-- Determine the grid index (u-grid) that corresponds to the location of
1160	!-- the rotor center (reduces the amount of calculations in the case that
1161	!-- the mean flow is perpendicular to the rotor area):
1162	i = i_hub(inot)
1163
1164	!
1165	!-- Determine the left and the right edge of the nacelle (corresponding
1166	!-- grid point indices):
1167	index_nacl(inot) = INT( ( hub_y(inot) - nacelle_radius(inot) + 0.5_wp * dy ) / dy )
1168	index_nacr(inot) = INT( ( hub_y(inot) + nacelle_radius(inot) + 0.5_wp * dy ) / dy )
1169	!
1170	!-- Determine the bottom and the top edge of the nacelle (corresponding
1171	!-- grid point indices).The grid point index has to be increased by 1, as
1172	!-- the first level for the u-component (index 0) is situated below the
1173	!-- surface. All points between z=0 and z=dz/s would already be contained
1174	!-- in grid box 1.
1175	index_nacb(inot) = INT( ( hub_z(inot) - nacelle_radius(inot) ) / dz(1) ) + 1
1176	index_nact(inot) = INT( ( hub_z(inot) + nacelle_radius(inot) ) / dz(1) ) + 1
1177
1178	!
1179	!-- Determine the indices of the grid boxes containing the left and
1180	!-- the right boundaries of the tower:
1181	tower_n = ( hub_y(inot) + 0.5_wp * tower_diameter(inot) - 0.5_wp * dy ) / dy
1182	tower_s = ( hub_y(inot) - 0.5_wp * tower_diameter(inot) - 0.5_wp * dy ) / dy
1183
1184	!
1185	!-- Determine the fraction of the grid box area overlapping with the tower
1186	!-- area and multiply it with the drag of the tower:
1187	IF ( ( nxlg <= i ) .AND. ( nxrg >= i ) ) THEN
1188
1189	DO j = nys, nyn
1190	!
1191	!-- Loop from south to north boundary of tower
1192	IF ( ( j >= tower_s ) .AND. ( j <= tower_n ) ) THEN
1193
1194	DO k = nzb, nzt
1195
1196	IF ( k == k_hub(inot) ) THEN
1197	IF ( tower_n - tower_s >= 1 ) THEN
1198	!
1199	!-- leftmost and rightmost grid box:
1200	IF ( j == tower_s ) THEN
1201	tow_cd_surf(k,j,i) = ( hub_z(inot) - &
1202	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) )*& ! extension in z-direction
1203	( ( tower_s + 1.0_wp + 0.5_wp ) * dy - &
1204	( hub_y(inot) - 0.5_wp * tower_diameter(inot) ) ) * & ! extension in y-direction
1205	tower_cd(inot)
1206	ELSEIF ( j == tower_n ) THEN
1207	tow_cd_surf(k,j,i) = ( hub_z(inot) - &
1208	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) )*& ! extension in z-direction
1209	( ( hub_y(inot) + 0.5_wp * tower_diameter(inot) ) - &
1210	( tower_n + 0.5_wp ) * dy ) * & ! extension in y-direction
1211	tower_cd(inot)
1212	!
1213	!-- grid boxes inbetween
1214	!-- (where tow_cd_surf = grid box area):
1215	ELSE
1216	tow_cd_surf(k,j,i) = ( hub_z(inot) - &
1217	( k_hub(inot) * dz(1) - 0.5_wp * dz(1) ) )*&
1218	dy * tower_cd(inot)
1219	ENDIF
1220	!
1221	!-- tower lies completely within one grid box:
1222	ELSE
1223	tow_cd_surf(k,j,i) = ( hub_z(inot) - ( k_hub(inot) * &
1224	dz(1) - 0.5_wp * dz(1) ) ) * &
1225	tower_diameter(inot) * tower_cd(inot)
1226	ENDIF
1227	!
1228	!-- In case that k is smaller than k_hub the following actions
1229	!-- are carried out:
1230	ELSEIF ( k < k_hub(inot) ) THEN
1231
1232	IF ( ( tower_n - tower_s ) >= 1 ) THEN
1233	!
1234	!-- leftmost and rightmost grid box:
1235	IF ( j == tower_s ) THEN
1236	tow_cd_surf(k,j,i) = dz(1) * ( &
1237	( tower_s + 1 + 0.5_wp ) * dy - &
1238	( hub_y(inot) - 0.5_wp * tower_diameter(inot) ) &
1239	) * tower_cd(inot)
1240	ELSEIF ( j == tower_n ) THEN
1241	tow_cd_surf(k,j,i) = dz(1) * ( &
1242	( hub_y(inot) + 0.5_wp * tower_diameter(inot) ) - &
1243	( tower_n + 0.5_wp ) * dy &
1244	) * tower_cd(inot)
1245	!
1246	!-- grid boxes inbetween
1247	!-- (where tow_cd_surf = grid box area):
1248	ELSE
1249	tow_cd_surf(k,j,i) = dz(1) * dy * &
1250	tower_cd(inot)
1251	ENDIF
1252	!
1253	!-- tower lies completely within one grid box:
1254	ELSE
1255	tow_cd_surf(k,j,i) = dz(1) * tower_diameter(inot) * &
1256	tower_cd(inot)
1257	ENDIF ! end if larger than grid box
1258
1259	ENDIF ! end if k == k_hub
1260
1261	ENDDO ! end loop over k
1262
1263	ENDIF ! end if inside north and south boundary of tower
1264
1265	ENDDO ! end loop over j
1266
1267	ENDIF ! end if hub inside domain + ghostpoints
1268
1269
1270	CALL exchange_horiz( tow_cd_surf, nbgp )
1271
1272	!
1273	!-- Calculation of the nacelle area
1274	!-- CAUTION: Currently disabled due to segmentation faults on the FLOW HPC
1275	!-- cluster (Oldenburg)
1276	!!
1277	!!-- Tabulate the points on the circle that are required in the following for
1278	!!-- the calculation of the Riemann integral (node points; they are called
1279	!!-- circle_points in the following):
1280	!
1281	! dy_int = dy / 10000.0_wp
1282	!
1283	! DO i_ip = 1, upper_end
1284	! yvalue = dy_int * ( i_ip - 0.5_wp ) + 0.5_wp * dy !<--- segmentation fault
1285	! sqrt_arg = nacelle_radius(inot)2 - ( yvalue - hub_y(inot) )2 !<--- segmentation fault
1286	! IF ( sqrt_arg >= 0.0_wp ) THEN
1287	!!
1288	!!-- bottom intersection point
1289	! circle_points(1,i_ip) = hub_z(inot) - SQRT( sqrt_arg )
1290	!!
1291	!!-- top intersection point
1292	! circle_points(2,i_ip) = hub_z(inot) + SQRT( sqrt_arg ) !<--- segmentation fault
1293	! ELSE
1294	! circle_points(:,i_ip) = -111111 !<--- segmentation fault
1295	! ENDIF
1296	! ENDDO
1297	!
1298	!
1299	! DO j = nys, nyn
1300	!!
1301	!!-- In case that the grid box is located completely outside the nacelle
1302	!!-- (y) it can automatically be stated that there is no overlap between
1303	!!-- the grid box and the nacelle and consequently we can set
1304	!!-- nac_cd_surf(:,j,i) = 0.0:
1305	! IF ( ( j >= index_nacl(inot) ) .AND. ( j <= index_nacr(inot) ) ) THEN
1306	! DO k = nzb+1, nzt
1307	!!
1308	!!-- In case that the grid box is located completely outside the
1309	!!-- nacelle (z) it can automatically be stated that there is no
1310	!!-- overlap between the grid box and the nacelle and consequently
1311	!!-- we can set nac_cd_surf(k,j,i) = 0.0:
1312	! IF ( ( k >= index_nacb(inot) ) .OR. &
1313	! ( k <= index_nact(inot) ) ) THEN
1314	!!
1315	!!-- For all other cases Riemann integrals are calculated.
1316	!!-- Here, the points on the circle that have been determined
1317	!!-- above are used in order to calculate the overlap between the
1318	!!-- gridbox and the nacelle area (area approached by 10000
1319	!!-- rectangulars dz_int * dy_int):
1320	! DO i_ipg = 1, 10000
1321	! dz_int = dz
1322	! i_ip = j * 10000 + i_ipg
1323	!!
1324	!!-- Determine the vertical extension dz_int of the circle
1325	!!-- within the current grid box:
1326	! IF ( ( circle_points(2,i_ip) < zw(k) ) .AND. & !<--- segmentation fault
1327	! ( circle_points(2,i_ip) >= zw(k-1) ) ) THEN
1328	! dz_int = dz_int - & !<--- segmentation fault
1329	! ( zw(k) - circle_points(2,i_ip) )
1330	! ENDIF
1331	! IF ( ( circle_points(1,i_ip) <= zw(k) ) .AND. & !<--- segmentation fault
1332	! ( circle_points(1,i_ip) > zw(k-1) ) ) THEN
1333	! dz_int = dz_int - &
1334	! ( circle_points(1,i_ip) - zw(k-1) )
1335	! ENDIF
1336	! IF ( zw(k-1) > circle_points(2,i_ip) ) THEN
1337	! dz_int = 0.0_wp
1338	! ENDIF
1339	! IF ( zw(k) < circle_points(1,i_ip) ) THEN
1340	! dz_int = 0.0_wp
1341	! ENDIF
1342	! IF ( ( nxlg <= i ) .AND. ( nxrg >= i ) ) THEN
1343	! nac_cd_surf(k,j,i) = nac_cd_surf(k,j,i) + & !<--- segmentation fault
1344	! dy_int * dz_int * nacelle_cd(inot)
1345	! ENDIF
1346	! ENDDO
1347	! ENDIF
1348	! ENDDO
1349	! ENDIF
1350	!
1351	! ENDDO
1352	!
1353	! CALL exchange_horiz( nac_cd_surf, nbgp ) !<--- segmentation fault
1354
1355	ENDDO ! end of loop over turbines
1356
1357	tow_cd_surf = tow_cd_surf / ( dx * dy * dz(1) ) ! Normalize tower drag
1358	nac_cd_surf = nac_cd_surf / ( dx * dy * dz(1) ) ! Normalize nacelle drag
1359
1360	CALL wtm_read_blade_tables
1361
1362	IF ( debug_output ) CALL debug_message( 'wtm_init', 'end' )
1363
1364	END SUBROUTINE wtm_init
1365
1366
1367
1368	SUBROUTINE wtm_init_output
1369
1370
1371	! INTEGER(iwp) :: ntimesteps !< number of timesteps defined in NetCDF output file
1372	! INTEGER(iwp) :: ntimesteps_max = 80000 !< number of maximum timesteps defined in NetCDF output file
1373	INTEGER(iwp) :: return_value !< returned status value of called function
1374
1375	INTEGER(iwp) :: n !< running index
1376
1377	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ndim !< dummy to write dimension
1378
1379
1380	!
1381	!-- Create NetCDF output file
1382	nc_filename = 'DATA_1D_TS_WTM_NETCDF' // TRIM( coupling_char )
1383	return_value = dom_def_file( nc_filename, 'netcdf4-serial' )
1384
1385	IF ( myid == 0 ) THEN
1386	!
1387	!-- Define dimensions in output file
1388	ALLOCATE( ndim(1:n_turbines) )
1389	DO n = 1, n_turbines
1390	ndim(n) = n
1391	ENDDO
1392	return_value = dom_def_dim( nc_filename, &
1393	dimension_name = 'turbine', &
1394	output_type = 'int32', &
1395	bounds = (/1_iwp, n_turbines/), &
1396	values_int32 = ndim )
1397	DEALLOCATE( ndim )
1398
1399	!
1400	!-- time
1401	return_value = dom_def_dim( nc_filename, &
1402	dimension_name = 'time', &
1403	output_type = 'real32', &
1404	bounds = (/1_iwp/), &
1405	values_realwp = (/0.0_wp/) )
1406
1407	!
1408	!-- x
1409	variable_name = 'x'
1410	return_value = dom_def_var( nc_filename, &
1411	variable_name = variable_name, &
1412	dimension_names = (/'turbine'/), &
1413	output_type = 'real32' )
1414	!
1415	!-- y
1416	variable_name = 'y'
1417	return_value = dom_def_var( nc_filename, &
1418	variable_name = variable_name, &
1419	dimension_names = (/'turbine'/), &
1420	output_type = 'real32' )
1421
1422	variable_name = 'z'
1423	return_value = dom_def_var( nc_filename, &
1424	variable_name = variable_name, &
1425	dimension_names = (/'turbine'/), &
1426	output_type = 'real32' )
1427
1428
1429	return_value = dom_def_att( nc_filename, &
1430	variable_name = 'time', &
1431	attribute_name = 'units', &
1432	value = 'seconds since ' // origin_date_time )
1433
1434	return_value = dom_def_att( nc_filename, &
1435	variable_name = 'x', &
1436	attribute_name = 'units', &
1437	value = 'm' )
1438
1439	return_value = dom_def_att( nc_filename, &
1440	variable_name = 'y', &
1441	attribute_name = 'units', &
1442	value = 'm' )
1443
1444	return_value = dom_def_att( nc_filename, &
1445	variable_name = 'z', &
1446	attribute_name = 'units', &
1447	value = 'm' )
1448
1449	return_value = dom_def_att( nc_filename, &
1450	variable_name = 'x', &
1451	attribute_name = 'long_name', &
1452	value = 'x location of rotor center' )
1453
1454	return_value = dom_def_att( nc_filename, &
1455	variable_name = 'y', &
1456	attribute_name = 'long_name', &
1457	value = 'y location of rotor center' )
1458
1459	return_value = dom_def_att( nc_filename, &
1460	variable_name = 'z', &
1461	attribute_name = 'long_name', &
1462	value = 'z location of rotor center' )
1463
1464
1465	return_value = dom_def_att( nc_filename, &
1466	variable_name = 'turbine_name', &
1467	attribute_name = 'long_name', &
1468	value = 'turbine name')
1469
1470	return_value = dom_def_att( nc_filename, &
1471	variable_name = 'time', &
1472	attribute_name = 'standard_name', &
1473	value = 'time')
1474
1475	return_value = dom_def_att( nc_filename, &
1476	variable_name = 'time', &
1477	attribute_name = 'axis', &
1478	value = 'T')
1479
1480	return_value = dom_def_att( nc_filename, &
1481	variable_name = 'x', &
1482	attribute_name = 'axis', &
1483	value = 'X' )
1484
1485	return_value = dom_def_att( nc_filename, &
1486	variable_name = 'y', &
1487	attribute_name = 'axis', &
1488	value = 'Y' )
1489
1490
1491	variable_name = 'rotor_speed'
1492	return_value = dom_def_var( nc_filename, &
1493	variable_name = variable_name, &
1494	dimension_names = (/ 'turbine', 'time ' /), &
1495	output_type = 'real32' )
1496
1497	return_value = dom_def_att( nc_filename, &
1498	variable_name = variable_name, &
1499	attribute_name = 'units', &
1500	value = 'rad/s' )
1501
1502	variable_name = 'generator_speed'
1503	return_value = dom_def_var( nc_filename, &
1504	variable_name = variable_name, &
1505	dimension_names = (/ 'turbine', 'time ' /), &
1506	output_type = 'real32' )
1507
1508	return_value = dom_def_att( nc_filename, &
1509	variable_name = variable_name, &
1510	attribute_name = 'units', &
1511	value = 'rad/s' )
1512
1513
1514	variable_name = 'generator_torque'
1515	return_value = dom_def_var( nc_filename, &
1516	variable_name = variable_name, &
1517	dimension_names = (/ 'turbine', 'time ' /), &
1518	output_type = 'real32' )
1519
1520	return_value = dom_def_att( nc_filename, &
1521	variable_name = variable_name, &
1522	attribute_name = 'units', &
1523	value = 'Nm' )
1524
1525	variable_name = 'rotor_torque'
1526	return_value = dom_def_var( nc_filename, &
1527	variable_name = variable_name, &
1528	dimension_names = (/ 'turbine', 'time ' /), &
1529	output_type = 'real32' )
1530
1531	return_value = dom_def_att( nc_filename, &
1532	variable_name = variable_name, &
1533	attribute_name = 'units', &
1534	value = 'Nm' )
1535
1536	variable_name = 'pitch_angle'
1537	return_value = dom_def_var( nc_filename, &
1538	variable_name = variable_name, &
1539	dimension_names = (/ 'turbine', 'time ' /), &
1540	output_type = 'real32' )
1541
1542	return_value = dom_def_att( nc_filename, &
1543	variable_name = variable_name, &
1544	attribute_name = 'units', &
1545	value = 'degrees' )
1546
1547	variable_name = 'generator_power'
1548	return_value = dom_def_var( nc_filename, &
1549	variable_name = variable_name, &
1550	dimension_names = (/ 'turbine', 'time ' /), &
1551	output_type = 'real32' )
1552
1553	return_value = dom_def_att( nc_filename, &
1554	variable_name = variable_name, &
1555	attribute_name = 'units', &
1556	value = 'W' )
1557
1558	variable_name = 'rotor_power'
1559	return_value = dom_def_var( nc_filename, &
1560	variable_name = variable_name, &
1561	dimension_names = (/ 'turbine', 'time ' /), &
1562	output_type = 'real32' )
1563
1564	return_value = dom_def_att( nc_filename, &
1565	variable_name = variable_name, &
1566	attribute_name = 'units', &
1567	value = 'W' )
1568
1569	variable_name = 'rotor_thrust'
1570	return_value = dom_def_var( nc_filename, &
1571	variable_name = variable_name, &
1572	dimension_names = (/ 'turbine', 'time ' /), &
1573	output_type = 'real32' )
1574
1575	return_value = dom_def_att( nc_filename, &
1576	variable_name = variable_name, &
1577	attribute_name = 'units', &
1578	value = 'N' )
1579
1580
1581	variable_name = 'wind_direction'
1582	return_value = dom_def_var( nc_filename, &
1583	variable_name = variable_name, &
1584	dimension_names = (/ 'turbine', 'time ' /), &
1585	output_type = 'real32' )
1586
1587	return_value = dom_def_att( nc_filename, &
1588	variable_name = variable_name, &
1589	attribute_name = 'units', &
1590	value = 'degrees' )
1591
1592	variable_name = 'yaw_angle'
1593	return_value = dom_def_var( nc_filename, &
1594	variable_name = variable_name, &
1595	dimension_names = (/ 'turbine', 'time ' /), &
1596	output_type = 'real32' )
1597
1598	return_value = dom_def_att( nc_filename, &
1599	variable_name = variable_name, &
1600	attribute_name = 'units', &
1601	value = 'degrees' )
1602
1603	ENDIF
1604	END SUBROUTINE
1605
1606	!------------------------------------------------------------------------------!
1607	! Description:
1608	! ------------
1609	!> Read in layout of the rotor blade , the lift and drag tables
1610	!> and the distribution of lift and drag tables along the blade
1611	!------------------------------------------------------------------------------!
1612	!
1613	SUBROUTINE wtm_read_blade_tables
1614
1615
1616	IMPLICIT NONE
1617
1618	INTEGER(iwp) :: ii !< running index
1619	INTEGER(iwp) :: jj !< running index
1620
1621	INTEGER(iwp) :: ierrn !<
1622
1623	CHARACTER(200) :: chmess !< Read in string
1624
1625	INTEGER(iwp) :: dlen !< no. rows of local table
1626	INTEGER(iwp) :: dlenbl !< no. rows of cd, cl table
1627	INTEGER(iwp) :: ialpha !< table position of current alpha value
1628	INTEGER(iwp) :: iialpha !<
1629	INTEGER(iwp) :: iir !<
1630	INTEGER(iwp) :: radres !< radial resolution
1631	INTEGER(iwp) :: t1 !< no. of airfoil
1632	INTEGER(iwp) :: t2 !< no. of airfoil
1633	INTEGER(iwp) :: trow !<
1634	INTEGER(iwp) :: dlenbl_int !< no. rows of interpolated cd, cl tables
1635
1636	REAL(wp) :: alpha_attack_i !<
1637	REAL(wp) :: weight_a !<
1638	REAL(wp) :: weight_b !<
1639
1640	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ttoint1 !<
1641	INTEGER(iwp), DIMENSION(:), ALLOCATABLE :: ttoint2 !<
1642
1643	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd_sel1 !<
1644	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cd_sel2 !<
1645	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl_sel1 !<
1646	REAL(wp), DIMENSION(:), ALLOCATABLE :: turb_cl_sel2 !<
1647	REAL(wp), DIMENSION(:), ALLOCATABLE :: read_cl_cd !< read in var array
1648
1649	REAL(wp), DIMENSION(:), ALLOCATABLE :: alpha_attack_tab !<
1650	REAL(wp), DIMENSION(:), ALLOCATABLE :: trad1 !<
1651	REAL(wp), DIMENSION(:), ALLOCATABLE :: trad2 !<
1652	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cd_table !<
1653	REAL(wp), DIMENSION(:,:), ALLOCATABLE :: turb_cl_table !<
1654
1655	ALLOCATE ( read_cl_cd(1:2*n_airfoils+1) )
1656
1657	!
1658	!-- Read in the distribution of lift and drag tables along the blade, the
1659	!-- layout of the rotor blade and the lift and drag tables:
1660
1661	OPEN ( 90, FILE='WTM_DATA', STATUS='OLD', FORM='FORMATTED', IOSTAT=ierrn )
1662
1663	IF ( ierrn /= 0 ) THEN
1664	message_string = 'file WTM_DATA does not exist'
1665	CALL message( 'wtm_init', 'PA0464', 1, 2, 0, 6, 0 )
1666	ENDIF
1667	!
1668	!-- Read distribution table:
1669
1670	dlen = 0
1671
1672	READ ( 90, '(3/)' )
1673
1674	rloop3: DO
1675	READ ( 90, *, IOSTAT=ierrn ) chmess
1676	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop3
1677	dlen = dlen + 1
1678	ENDDO rloop3
1679
1680	ALLOCATE( trad1(1:dlen), trad2(1:dlen), ttoint1(1:dlen), ttoint2(1:dlen))
1681
1682	DO jj = 1,dlen+1
1683	BACKSPACE ( 90, IOSTAT=ierrn )
1684	ENDDO
1685
1686	DO jj = 1,dlen
1687	READ ( 90, * ) trad1(jj), trad2(jj), ttoint1(jj), ttoint2(jj)
1688	ENDDO
1689
1690	!
1691	!-- Read layout table:
1692
1693	dlen = 0
1694
1695	READ ( 90, '(3/)')
1696
1697	rloop1: DO
1698	READ ( 90, *, IOSTAT=ierrn ) chmess
1699	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop1
1700	dlen = dlen + 1
1701	ENDDO rloop1
1702
1703	ALLOCATE( lrd(1:dlen), ard(1:dlen), crd(1:dlen) )
1704	DO jj = 1, dlen+1
1705	BACKSPACE ( 90, IOSTAT=ierrn )
1706	ENDDO
1707	DO jj = 1, dlen
1708	READ ( 90, * ) lrd(jj), ard(jj), crd(jj)
1709	ENDDO
1710
1711	!
1712	!-- Read tables (turb_cl(alpha),turb_cd(alpha) for the different profiles:
1713
1714	dlen = 0
1715
1716	READ ( 90, '(3/)' )
1717
1718	rloop2: DO
1719	READ ( 90, *, IOSTAT=ierrn ) chmess
1720	IF ( ierrn < 0 .OR. chmess == '#' .OR. chmess == '') EXIT rloop2
1721	dlen = dlen + 1
1722	ENDDO rloop2
1723
1724	ALLOCATE( alpha_attack_tab(1:dlen), turb_cl_table(1:dlen,1:n_airfoils), &
1725	turb_cd_table(1:dlen,1:n_airfoils) )
1726
1727	DO jj = 1,dlen+1
1728	BACKSPACE ( 90, IOSTAT=ierrn )
1729	ENDDO
1730
1731	DO jj = 1,dlen
1732	READ ( 90, * ) read_cl_cd
1733	alpha_attack_tab(jj) = read_cl_cd(1)
1734	DO ii= 1, n_airfoils
1735	turb_cl_table(jj,ii) = read_cl_cd(ii*2)
1736	turb_cd_table(jj,ii) = read_cl_cd(ii*2+1)
1737	ENDDO
1738
1739	ENDDO
1740
1741	dlenbl = dlen
1742
1743	CLOSE ( 90 )
1744
1745	!
1746	!-- For each possible radial position (resolution: 0.1 m --> 631 values if rotor_radius(1)=63m)
1747	!-- and each possible angle of attack (resolution: 0.1 degrees --> 3601 values!)
1748	!-- determine the lift and drag coefficient by interpolating between the
1749	!-- tabulated values of each table (interpolate to current angle of attack)
1750	!-- and between the tables (interpolate to current radial position):
1751
1752	ALLOCATE( turb_cl_sel1(1:dlenbl) )
1753	ALLOCATE( turb_cl_sel2(1:dlenbl) )
1754	ALLOCATE( turb_cd_sel1(1:dlenbl) )
1755	ALLOCATE( turb_cd_sel2(1:dlenbl) )
1756
1757	radres = INT( rotor_radius(1) * 10.0_wp ) + 1_iwp
1758	dlenbl_int = INT( 360.0_wp / accu_cl_cd_tab ) + 1_iwp
1759
1760	ALLOCATE( turb_cl_tab(1:dlenbl_int,1:radres) )
1761	ALLOCATE( turb_cd_tab(1:dlenbl_int,1:radres) )
1762
1763	DO iir = 1, radres ! loop over radius
1764
1765	cur_r = ( iir - 1_iwp ) * 0.1_wp
1766	!
1767	!-- Find position in table 1
1768	lct = MINLOC( ABS( trad1 - cur_r ) )
1769	! lct(1) = lct(1)
1770
1771	IF ( ( trad1(lct(1)) - cur_r ) > 0.0 ) THEN
1772	lct(1) = lct(1) - 1
1773	ENDIF
1774
1775	trow = lct(1)
1776	!
1777	!-- Calculate weights for radius interpolation
1778	weight_a = ( trad2(trow) - cur_r ) / ( trad2(trow) - trad1(trow) )
1779	weight_b = ( cur_r - trad1(trow) ) / ( trad2(trow) - trad1(trow) )
1780	t1 = ttoint1(trow)
1781	t2 = ttoint2(trow)
1782
1783	IF ( t1 == t2 ) THEN ! if both are the same, the weights are NaN
1784	weight_a = 0.5_wp ! then do interpolate in between same twice
1785	weight_b = 0.5_wp ! using 0.5 as weight
1786	ENDIF
1787
1788	IF ( t1 == 0 .AND. t2 == 0 ) THEN
1789	turb_cd_sel1 = 0.0_wp
1790	turb_cd_sel2 = 0.0_wp
1791	turb_cl_sel1 = 0.0_wp
1792	turb_cl_sel2 = 0.0_wp
1793
1794	turb_cd_tab(1,iir) = 0.0_wp ! For -180 degrees (iialpha=1) the values
1795	turb_cl_tab(1,iir) = 0.0_wp ! for each radius has to be set
1796	! explicitly
1797	ELSE
1798	turb_cd_sel1 = turb_cd_table(:,t1)
1799	turb_cd_sel2 = turb_cd_table(:,t2)
1800	turb_cl_sel1 = turb_cl_table(:,t1)
1801	turb_cl_sel2 = turb_cl_table(:,t2)
1802	!
1803	!-- For -180 degrees (iialpha=1) the values for each radius has to be set
1804	!-- explicitly
1805	turb_cd_tab(1,iir) = ( weight_a * turb_cd_table(1,t1) + weight_b &
1806	* turb_cd_table(1,t2) )
1807	turb_cl_tab(1,iir) = ( weight_a * turb_cl_table(1,t1) + weight_b &
1808	* turb_cl_table(1,t2) )
1809	ENDIF
1810
1811	DO iialpha = 2, dlenbl_int ! loop over angles
1812
1813	alpha_attack_i = -180.0_wp + REAL( iialpha-1 ) * accu_cl_cd_tab
1814	ialpha = 1
1815
1816	DO WHILE ( ( alpha_attack_i > alpha_attack_tab(ialpha) ) .AND. (ialpha < dlen ) )
1817	ialpha = ialpha + 1
1818	ENDDO
1819
1820	!
1821	!-- Interpolation of lift and drag coefficiencts on fine grid of radius
1822	!-- segments and angles of attack
1823
1824	turb_cl_tab(iialpha,iir) = ( alpha_attack_tab(ialpha) - &
1825	alpha_attack_i ) / &
1826	( alpha_attack_tab(ialpha) - &
1827	alpha_attack_tab(ialpha-1) ) * &
1828	( weight_a * turb_cl_sel1(ialpha-1) + &
1829	weight_b * turb_cl_sel2(ialpha-1) ) +&
1830	( alpha_attack_i - &
1831	alpha_attack_tab(ialpha-1) ) / &
1832	( alpha_attack_tab(ialpha) - &
1833	alpha_attack_tab(ialpha-1) ) * &
1834	( weight_a * turb_cl_sel1(ialpha) + &
1835	weight_b * turb_cl_sel2(ialpha) )
1836	turb_cd_tab(iialpha,iir) = ( alpha_attack_tab(ialpha) - &
1837	alpha_attack_i ) / &
1838	( alpha_attack_tab(ialpha) - &
1839	alpha_attack_tab(ialpha-1) ) * &
1840	( weight_a * turb_cd_sel1(ialpha-1) + &
1841	weight_b * turb_cd_sel2(ialpha-1) ) +&
1842	( alpha_attack_i - &
1843	alpha_attack_tab(ialpha-1) ) / &
1844	( alpha_attack_tab(ialpha) - &
1845	alpha_attack_tab(ialpha-1) ) * &
1846	( weight_a * turb_cd_sel1(ialpha) + &
1847	weight_b * turb_cd_sel2(ialpha) )
1848
1849	ENDDO ! end loop over angles of attack
1850
1851	ENDDO ! end loop over radius
1852
1853
1854	END SUBROUTINE wtm_read_blade_tables
1855
1856
1857	!------------------------------------------------------------------------------!
1858	! Description:
1859	! ------------
1860	!> The projection matrix for the coordinate system of therotor disc in respect
1861	!> to the yaw and tilt angle of the rotor is calculated
1862	!------------------------------------------------------------------------------!
1863	SUBROUTINE wtm_rotate_rotor( inot )
1864
1865
1866	IMPLICIT NONE
1867
1868	INTEGER(iwp) :: inot
1869	!
1870	!-- Calculation of the rotation matrix for the application of the tilt to
1871	!-- the rotors
1872	rot_eigen_rad(1) = SIN( yaw_angle(inot) ) ! x-component of the radial eigenvector
1873	rot_eigen_rad(2) = COS( yaw_angle(inot) ) ! y-component of the radial eigenvector
1874	rot_eigen_rad(3) = 0.0_wp ! z-component of the radial eigenvector
1875
1876	rot_eigen_azi(1) = 0.0_wp ! x-component of the azimuth eigenvector
1877	rot_eigen_azi(2) = 0.0_wp ! y-component of the azimuth eigenvector
1878	rot_eigen_azi(3) = 1.0_wp ! z-component of the azimuth eigenvector
1879
1880	rot_eigen_nor(1) = COS( yaw_angle(inot) ) ! x-component of the normal eigenvector
1881	rot_eigen_nor(2) = -SIN( yaw_angle(inot) ) ! y-component of the normal eigenvector
1882	rot_eigen_nor(3) = 0.0_wp ! z-component of the normal eigenvector
1883
1884	!
1885	!-- Calculation of the coordinate transformation matrix to apply a tilt to
1886	!-- the rotor. If tilt = 0, rot_coord_trans is a unit matrix.
1887
1888	rot_coord_trans(inot,1,1) = rot_eigen_rad(1)*2 &
1889	( 1.0_wp - COS( tilt_angle ) ) + COS( tilt_angle )
1890	rot_coord_trans(inot,1,2) = rot_eigen_rad(1) * rot_eigen_rad(2) * &
1891	( 1.0_wp - COS( tilt_angle ) ) - &
1892	rot_eigen_rad(3) * SIN( tilt_angle )
1893	rot_coord_trans(inot,1,3) = rot_eigen_rad(1) * rot_eigen_rad(3) * &
1894	( 1.0_wp - COS( tilt_angle ) ) + &
1895	rot_eigen_rad(2) * SIN( tilt_angle )
1896	rot_coord_trans(inot,2,1) = rot_eigen_rad(2) * rot_eigen_rad(1) * &
1897	( 1.0_wp - COS( tilt_angle ) ) + &
1898	rot_eigen_rad(3) * SIN( tilt_angle )
1899	rot_coord_trans(inot,2,2) = rot_eigen_rad(2)*2 &
1900	( 1.0_wp - COS( tilt_angle ) ) + COS( tilt_angle )
1901	rot_coord_trans(inot,2,3) = rot_eigen_rad(2) * rot_eigen_rad(3) * &
1902	( 1.0_wp - COS( tilt_angle ) ) - &
1903	rot_eigen_rad(1) * SIN( tilt_angle )
1904	rot_coord_trans(inot,3,1) = rot_eigen_rad(3) * rot_eigen_rad(1) * &
1905	( 1.0_wp - COS( tilt_angle ) ) - &
1906	rot_eigen_rad(2) * SIN( tilt_angle )
1907	rot_coord_trans(inot,3,2) = rot_eigen_rad(3) * rot_eigen_rad(2) * &
1908	( 1.0_wp - COS( tilt_angle ) ) + &
1909	rot_eigen_rad(1) * SIN( tilt_angle )
1910	rot_coord_trans(inot,3,3) = rot_eigen_rad(3)*2 &
1911	( 1.0_wp - COS( tilt_angle ) ) + COS( tilt_angle )
1912
1913	!
1914	!-- Vectors for the Transformation of forces from the rotor's spheric
1915	!-- coordinate system to the cartesian coordinate system
1916	rotx(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_nor )
1917	roty(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_rad )
1918	rotz(inot,:) = MATMUL( rot_coord_trans(inot,:,:), rot_eigen_azi )
1919
1920	END SUBROUTINE wtm_rotate_rotor
1921
1922
1923	!------------------------------------------------------------------------------!
1924	! Description:
1925	! ------------
1926	!> Calculation of the forces generated by the wind turbine
1927	!------------------------------------------------------------------------------!
1928	SUBROUTINE wtm_forces
1929
1930
1931	IMPLICIT NONE
1932
1933	CHARACTER (LEN=4) :: turbine_id
1934
1935	INTEGER(iwp) :: i, j, k !< loop indices
1936	INTEGER(iwp) :: inot !< turbine loop index (turbine id)
1937	INTEGER(iwp) :: iialpha, iir !<
1938	INTEGER(iwp) :: rseg !<
1939	INTEGER(iwp) :: ring !<
1940	INTEGER(iwp) :: ii, jj, kk !<
1941
1942	REAL(wp) :: flag !< flag to mask topography grid points
1943	REAL(wp) :: sin_rot, cos_rot !<
1944	REAL(wp) :: sin_yaw, cos_yaw !<
1945
1946	REAL(wp) :: aa, bb, cc, dd !< interpolation distances
1947	REAL(wp) :: gg !< interpolation volume var
1948
1949	REAL(wp) :: dist_u_3d, dist_v_3d, dist_w_3d !< smearing distances
1950
1951
1952	!
1953	! Variables for pitch control
1954	LOGICAL :: pitch_sw = .FALSE.
1955
1956	INTEGER(iwp), DIMENSION(1) :: lct = 0
1957	REAL(wp), DIMENSION(1) :: rad_d = 0.0_wp
1958
1959	REAL(wp) :: tl_factor !< factor for tip loss correction
1960
1961
1962	CALL cpu_log( log_point_s(61), 'wtm_forces', 'start' )
1963
1964
1965	IF ( time_since_reference_point >= time_turbine_on ) THEN
1966
1967	!
1968	!-- Set forces to zero for each new time step:
1969	thrust(:,:,:) = 0.0_wp
1970	torque_y(:,:,:) = 0.0_wp
1971	torque_z(:,:,:) = 0.0_wp
1972	torque_total(:) = 0.0_wp
1973	rot_tend_x(:,:,:) = 0.0_wp
1974	rot_tend_y(:,:,:) = 0.0_wp
1975	rot_tend_z(:,:,:) = 0.0_wp
1976	thrust_rotor(:) = 0.0_wp
1977	!
1978	!-- Loop over number of turbines:
1979	DO inot = 1, n_turbines
1980
1981	cos_yaw = COS(yaw_angle(inot))
1982	sin_yaw = SIN(yaw_angle(inot))
1983	!
1984	!-- Loop over rings of each turbine:
1985
1986	!$OMP PARALLEL PRIVATE (ring, rseg, thrust_seg, torque_seg_y, torque_seg_z, sin_rot, &
1987	!$OMP& cos_rot, re, rbx, rby, rbz, ii, jj, kk, aa, bb, cc, dd, gg)
1988	!$OMP DO
1989	DO ring = 1, nrings(inot)
1990
1991	thrust_seg(:) = 0.0_wp
1992	torque_seg_y(:) = 0.0_wp
1993	torque_seg_z(:) = 0.0_wp
1994	!
1995	!-- Determine distance between each ring (center) and the hub:
1996	cur_r = (ring - 0.5_wp) * delta_r(inot)
1997
1998	!
1999	!-- Loop over segments of each ring of each turbine:
2000	DO rseg = 1, nsegs(ring,inot)
2001	!
2002	!-- !-----------------------------------------------------------!
2003	!-- !-- Determine coordinates of the ring segments --!
2004	!-- !-----------------------------------------------------------!
2005	!
2006	!-- Determine angle of ring segment towards zero degree angle of
2007	!-- rotor system (at zero degree rotor direction vectors aligned
2008	!-- with y-axis):
2009	phi_rotor = rseg * 2.0_wp * pi / nsegs(ring,inot)
2010	cos_rot = COS( phi_rotor )
2011	sin_rot = SIN( phi_rotor )
2012
2013	!-- Now the direction vectors can be determined with respect to
2014	!-- the yaw and tilt angle:
2015	re(1) = cos_rot * sin_yaw
2016	re(2) = cos_rot * cos_yaw
2017	re(3) = sin_rot
2018
2019	rote = MATMUL( rot_coord_trans(inot,:,:), re )
2020	!
2021	!-- Coordinates of the single segments (center points):
2022	rbx(ring,rseg) = hub_x(inot) + cur_r * rote(1)
2023	rby(ring,rseg) = hub_y(inot) + cur_r * rote(2)
2024	rbz(ring,rseg) = hub_z(inot) + cur_r * rote(3)
2025
2026	!-- !-----------------------------------------------------------!
2027	!-- !-- Interpolation of the velocity components from the --!
2028	!-- !-- cartesian grid point to the coordinates of each ring --!
2029	!-- !-- segment (follows a method used in the particle model) --!
2030	!-- !-----------------------------------------------------------!
2031
2032	u_int(inot,ring,rseg) = 0.0_wp
2033	u_int_1_l(inot,ring,rseg) = 0.0_wp
2034
2035	v_int(inot,ring,rseg) = 0.0_wp
2036	v_int_1_l(inot,ring,rseg) = 0.0_wp
2037
2038	w_int(inot,ring,rseg) = 0.0_wp
2039	w_int_1_l(inot,ring,rseg) = 0.0_wp
2040
2041	!
2042	!-- Interpolation of the u-component:
2043
2044	ii = rbx(ring,rseg) * ddx
2045	jj = ( rby(ring,rseg) - 0.5_wp * dy ) * ddy
2046	kk = ( rbz(ring,rseg) + 0.5_wp * dz(1) ) / dz(1)
2047	!
2048	!-- Interpolate only if all required information is available on
2049	!-- the current PE:
2050	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
2051	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
2052
2053	aa = ( ( ii + 1 ) * dx - rbx(ring,rseg) ) * &
2054	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
2055	bb = ( rbx(ring,rseg) - ii * dx ) * &
2056	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
2057	cc = ( ( ii+1 ) * dx - rbx(ring,rseg) ) * &
2058	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
2059	dd = ( rbx(ring,rseg) - ii * dx ) * &
2060	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
2061	gg = dx * dy
2062
2063	u_int_l = ( aa * u(kk,jj,ii) + &
2064	bb * u(kk,jj,ii+1) + &
2065	cc * u(kk,jj+1,ii) + &
2066	dd * u(kk,jj+1,ii+1) &
2067	) / gg
2068
2069	u_int_u = ( aa * u(kk+1,jj,ii) + &
2070	bb * u(kk+1,jj,ii+1) + &
2071	cc * u(kk+1,jj+1,ii) + &
2072	dd * u(kk+1,jj+1,ii+1) &
2073	) / gg
2074
2075	u_int_1_l(inot,ring,rseg) = u_int_l + &
2076	( rbz(ring,rseg) - zu(kk) ) / dz(1) * &
2077	( u_int_u - u_int_l )
2078
2079	ELSE
2080	u_int_1_l(inot,ring,rseg) = 0.0_wp
2081	ENDIF
2082	ELSE
2083	u_int_1_l(inot,ring,rseg) = 0.0_wp
2084	ENDIF
2085
2086
2087	!
2088	!-- Interpolation of the v-component:
2089	ii = ( rbx(ring,rseg) - 0.5_wp * dx ) * ddx
2090	jj = rby(ring,rseg) * ddy
2091	kk = ( rbz(ring,rseg) + 0.5_wp * dz(1) ) / dz(1)
2092	!
2093	!-- Interpolate only if all required information is available on
2094	!-- the current PE:
2095	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
2096	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
2097
2098	aa = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
2099	( ( jj + 1 ) * dy - rby(ring,rseg) )
2100	bb = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
2101	( ( jj + 1 ) * dy - rby(ring,rseg) )
2102	cc = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
2103	( rby(ring,rseg) - jj * dy )
2104	dd = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
2105	( rby(ring,rseg) - jj * dy )
2106	gg = dx * dy
2107
2108	v_int_l = ( aa * v(kk,jj,ii) + &
2109	bb * v(kk,jj,ii+1) + &
2110	cc * v(kk,jj+1,ii) + &
2111	dd * v(kk,jj+1,ii+1) &
2112	) / gg
2113
2114	v_int_u = ( aa * v(kk+1,jj,ii) + &
2115	bb * v(kk+1,jj,ii+1) + &
2116	cc * v(kk+1,jj+1,ii) + &
2117	dd * v(kk+1,jj+1,ii+1) &
2118	) / gg
2119
2120	v_int_1_l(inot,ring,rseg) = v_int_l + &
2121	( rbz(ring,rseg) - zu(kk) ) / dz(1) * &
2122	( v_int_u - v_int_l )
2123
2124	ELSE
2125	v_int_1_l(inot,ring,rseg) = 0.0_wp
2126	ENDIF
2127	ELSE
2128	v_int_1_l(inot,ring,rseg) = 0.0_wp
2129	ENDIF
2130
2131
2132	!
2133	!-- Interpolation of the w-component:
2134	ii = ( rbx(ring,rseg) - 0.5_wp * dx ) * ddx
2135	jj = ( rby(ring,rseg) - 0.5_wp * dy ) * ddy
2136	kk = rbz(ring,rseg) / dz(1)
2137	!
2138	!-- Interpolate only if all required information is available on
2139	!-- the current PE:
2140	IF ( ( ii >= nxl ) .AND. ( ii <= nxr ) ) THEN
2141	IF ( ( jj >= nys ) .AND. ( jj <= nyn ) ) THEN
2142
2143	aa = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
2144	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
2145	bb = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
2146	( ( jj + 1 + 0.5_wp ) * dy - rby(ring,rseg) )
2147	cc = ( ( ii + 1 + 0.5_wp ) * dx - rbx(ring,rseg) ) * &
2148	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
2149	dd = ( rbx(ring,rseg) - ( ii + 0.5_wp ) * dx ) * &
2150	( rby(ring,rseg) - ( jj + 0.5_wp ) * dy )
2151	gg = dx * dy
2152
2153	w_int_l = ( aa * w(kk,jj,ii) + &
2154	bb * w(kk,jj,ii+1) + &
2155	cc * w(kk,jj+1,ii) + &
2156	dd * w(kk,jj+1,ii+1) &
2157	) / gg
2158
2159	w_int_u = ( aa * w(kk+1,jj,ii) + &
2160	bb * w(kk+1,jj,ii+1) + &
2161	cc * w(kk+1,jj+1,ii) + &
2162	dd * w(kk+1,jj+1,ii+1) &
2163	) / gg
2164
2165	w_int_1_l(inot,ring,rseg) = w_int_l + &
2166	( rbz(ring,rseg) - zw(kk) ) / dz(1) * &
2167	( w_int_u - w_int_l )
2168	ELSE
2169	w_int_1_l(inot,ring,rseg) = 0.0_wp
2170	ENDIF
2171	ELSE
2172	w_int_1_l(inot,ring,rseg) = 0.0_wp
2173	ENDIF
2174
2175	ENDDO
2176	ENDDO
2177	!$OMP END PARALLEL
2178
2179	ENDDO
2180
2181	!
2182	!-- Exchange between PEs (information required on each PE):
2183	#if defined( __parallel )
2184	CALL MPI_ALLREDUCE( u_int_1_l, u_int, n_turbines * MAXVAL(nrings) * &
2185	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
2186	CALL MPI_ALLREDUCE( v_int_1_l, v_int, n_turbines * MAXVAL(nrings) * &
2187	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
2188	CALL MPI_ALLREDUCE( w_int_1_l, w_int, n_turbines * MAXVAL(nrings) * &
2189	MAXVAL(nsegs), MPI_REAL, MPI_SUM, comm2d, ierr )
2190	#else
2191	u_int = u_int_1_l
2192	v_int = v_int_1_l
2193	w_int = w_int_1_l
2194	#endif
2195
2196
2197	!
2198	!-- Loop over number of turbines:
2199
2200	DO inot = 1, n_turbines
2201	pit_loop: DO
2202
2203	IF ( pitch_sw ) THEN
2204	torque_total(inot) = 0.0_wp
2205	thrust_rotor(inot) = 0.0_wp
2206	pitch_angle(inot) = pitch_angle(inot) + 0.25_wp
2207	! IF ( myid == 0 ) PRINT*, 'Pitch', inot, pitch_angle(inot)
2208	ELSE
2209	cos_yaw = COS(yaw_angle(inot))
2210	sin_yaw = SIN(yaw_angle(inot))
2211	IF ( pitch_control ) THEN
2212	pitch_angle(inot) = MAX(pitch_angle_old(inot) - pitch_rate * &
2213	dt_3d , 0.0_wp )
2214	ENDIF
2215	ENDIF
2216
2217	!
2218	!-- Loop over rings of each turbine:
2219	!$OMP PARALLEL PRIVATE (ring, rseg, sin_rot, cos_rot, re, rea, ren, rote, rota, rotn, &
2220	!$OMP& vtheta, phi_rel, lct, rad_d, alpha_attack, vrel, &
2221	!$OMP& chord, iialpha, iir, turb_cl, tl_factor, thrust_seg, &
2222	!$OMP& torque_seg_y, turb_cd, torque_seg_z, thrust_ring, &
2223	!$OMP& torque_ring_y, torque_ring_z)
2224	!$OMP DO
2225	DO ring = 1, nrings(inot)
2226	!
2227	!-- Determine distance between each ring (center) and the hub:
2228	cur_r = (ring - 0.5_wp) * delta_r(inot)
2229	!
2230	!-- Loop over segments of each ring of each turbine:
2231	DO rseg = 1, nsegs(ring,inot)
2232	!
2233	!-- Determine angle of ring segment towards zero degree angle of
2234	!-- rotor system (at zero degree rotor direction vectors aligned
2235	!-- with y-axis):
2236	phi_rotor = rseg * 2.0_wp * pi / nsegs(ring,inot)
2237	cos_rot = COS(phi_rotor)
2238	sin_rot = SIN(phi_rotor)
2239	!
2240	!-- Now the direction vectors can be determined with respect to
2241	!-- the yaw and tilt angle:
2242	re(1) = cos_rot * sin_yaw
2243	re(2) = cos_rot * cos_yaw
2244	re(3) = sin_rot
2245
2246	! The current unit vector in azimuthal direction:
2247	rea(1) = - sin_rot * sin_yaw
2248	rea(2) = - sin_rot * cos_yaw
2249	rea(3) = cos_rot
2250
2251	!
2252	!-- To respect the yawing angle for the calculations of
2253	!-- velocities and forces the unit vectors perpendicular to the
2254	!-- rotor area in direction of the positive yaw angle are defined:
2255	ren(1) = cos_yaw
2256	ren(2) = - sin_yaw
2257	ren(3) = 0.0_wp
2258	!
2259	!-- Multiplication with the coordinate transformation matrix
2260	!-- gives the final unit vector with consideration of the rotor
2261	!-- tilt:
2262	rote = MATMUL( rot_coord_trans(inot,:,:), re )
2263	rota = MATMUL( rot_coord_trans(inot,:,:), rea )
2264	rotn = MATMUL( rot_coord_trans(inot,:,:), ren )
2265	!
2266	!-- Coordinates of the single segments (center points):
2267	rbx(ring,rseg) = hub_x(inot) + cur_r * rote(1)
2268
2269	rby(ring,rseg) = hub_y(inot) + cur_r * rote(2)
2270
2271	rbz(ring,rseg) = hub_z(inot) + cur_r * rote(3)
2272
2273	!
2274	!-- !-----------------------------------------------------------!
2275	!-- !-- Calculation of various angles and relative velocities --!
2276	!-- !-----------------------------------------------------------!
2277	!
2278	!-- In the following the 3D-velocity field is projected its
2279	!-- components perpendicular and parallel to the rotor area
2280	!-- The calculation of forces will be done in the rotor-
2281	!-- coordinates y' and z.
2282	!-- The yaw angle will be reintroduced when the force is applied
2283	!-- on the hydrodynamic equations
2284	!
2285	!-- Projection of the xy-velocities relative to the rotor area
2286	!
2287	!-- Velocity perpendicular to the rotor area:
2288	u_rot = u_int(inot,ring,rseg)*rotn(1) + &
2289	v_int(inot,ring,rseg)*rotn(2) + &
2290	w_int(inot,ring,rseg)*rotn(3)
2291	!
2292	!-- Projection of the 3D-velocity vector in the azimuthal
2293	!-- direction:
2294	vtheta(rseg) = rota(1) * u_int(inot,ring,rseg) + &
2295	rota(2) * v_int(inot,ring,rseg) + &
2296	rota(3) * w_int(inot,ring,rseg)
2297	!
2298	!-- Determination of the angle phi_rel between the rotor plane
2299	!-- and the direction of the flow relative to the rotor:
2300
2301	phi_rel(rseg) = ATAN2( u_rot , &
2302	( rotor_speed(inot) * cur_r - &
2303	vtheta(rseg) ) )
2304
2305	!
2306	!-- Interpolation of the local pitch angle from tabulated values
2307	!-- to the current radial position:
2308
2309	lct=minloc(ABS(cur_r-lrd))
2310	rad_d=cur_r-lrd(lct)
2311
2312	IF (cur_r == 0.0_wp) THEN
2313	alpha_attack(rseg) = 0.0_wp
2314	ELSE IF (cur_r >= lrd(size(ard))) THEN
2315	alpha_attack(rseg) = ( ard(size(ard)) + &
2316	ard(size(ard)-1) ) / 2.0_wp
2317	ELSE
2318	alpha_attack(rseg) = ( ard(lct(1)) * &
2319	( ( lrd(lct(1)+1) - cur_r ) / &
2320	( lrd(lct(1)+1) - lrd(lct(1)) ) &
2321	) ) + ( ard(lct(1)+1) * &
2322	( ( cur_r - lrd(lct(1)) ) / &
2323	( lrd(lct(1)+1) - lrd(lct(1)) ) ) )
2324	ENDIF
2325
2326	!
2327	!-- In Fortran radian instead of degree is used as unit for all
2328	!-- angles. Therefore, a transformation from angles given in
2329	!-- degree to angles given in radian is necessary here:
2330	alpha_attack(rseg) = alpha_attack(rseg) * &
2331	( (2.0_wp*pi) / 360.0_wp )
2332	!
2333	!-- Substraction of the local pitch angle to obtain the local
2334	!-- angle of attack:
2335	alpha_attack(rseg) = phi_rel(rseg) - alpha_attack(rseg)
2336	!
2337	!-- Preliminary transformation back from angles given in radian
2338	!-- to angles given in degree:
2339	alpha_attack(rseg) = alpha_attack(rseg) * &
2340	( 360.0_wp / (2.0_wp*pi) )
2341	!
2342	!-- Correct with collective pitch angle:
2343	alpha_attack(rseg) = alpha_attack(rseg) - pitch_angle(inot)
2344
2345	!
2346	!-- Determination of the magnitude of the flow velocity relative
2347	!-- to the rotor:
2348	vrel(rseg) = SQRT( u_rot**2 + &
2349	( rotor_speed(inot) * cur_r - &
2350	vtheta(rseg) )**2 )
2351
2352	!
2353	!-- !-----------------------------------------------------------!
2354	!-- !-- Interpolation of chord as well as lift and drag --!
2355	!-- !-- coefficients from tabulated values --!
2356	!-- !-----------------------------------------------------------!
2357
2358	!
2359	!-- Interpolation of the chord_length from tabulated values to
2360	!-- the current radial position:
2361
2362	IF (cur_r == 0.0_wp) THEN
2363	chord(rseg) = 0.0_wp
2364	ELSE IF (cur_r >= lrd(size(crd))) THEN
2365	chord(rseg) = (crd(size(crd)) + ard(size(crd)-1)) / 2.0_wp
2366	ELSE
2367	chord(rseg) = ( crd(lct(1)) * &
2368	( ( lrd(lct(1)+1) - cur_r ) / &
2369	( lrd(lct(1)+1) - lrd(lct(1)) ) ) ) + &
2370	( crd(lct(1)+1) * &
2371	( ( cur_r-lrd(lct(1)) ) / &
2372	( lrd(lct(1)+1) - lrd(lct(1)) ) ) )
2373	ENDIF
2374
2375	!
2376	!-- Determine index of current angle of attack, needed for
2377	!-- finding the appropriate interpolated values of the lift and
2378	!-- drag coefficients (-180.0 degrees = 1, +180.0 degrees = 3601,
2379	!-- so one index every 0.1 degrees):
2380	iialpha = CEILING( ( alpha_attack(rseg) + 180.0_wp ) &
2381	* ( 1.0_wp / accu_cl_cd_tab ) ) + 1.0_wp
2382	!
2383	!-- Determine index of current radial position, needed for
2384	!-- finding the appropriate interpolated values of the lift and
2385	!-- drag coefficients (one index every 0.1 m):
2386	iir = CEILING( cur_r * 10.0_wp )
2387	!
2388	!-- Read in interpolated values of the lift and drag coefficients
2389	!-- for the current radial position and angle of attack:
2390	turb_cl(rseg) = turb_cl_tab(iialpha,iir)
2391	turb_cd(rseg) = turb_cd_tab(iialpha,iir)
2392
2393	!
2394	!-- Final transformation back from angles given in degree to
2395	!-- angles given in radian:
2396	alpha_attack(rseg) = alpha_attack(rseg) * &
2397	( (2.0_wp*pi) / 360.0_wp )
2398
2399	IF ( tip_loss_correction ) THEN
2400
2401	!-- Tip loss correction following Schito
2402	!-- Schito applies the tip loss correction only to the lift force
2403	!-- Therefore, the tip loss correction is only applied to the lift
2404	!-- coefficient and not to the drag coefficient in our case
2405	!--
2406	tl_factor = ( 2.0 / pi ) * &
2407	ACOS( EXP( -1.0 * ( 3.0 * ( rotor_radius(inot) - cur_r ) / &
2408	( 2.0 * cur_r * abs( sin( phi_rel(rseg) ) ) ) ) ) )
2409
2410	turb_cl(rseg) = tl_factor * turb_cl(rseg)
2411
2412	ENDIF
2413	!
2414	!-- !-----------------------------------------------------!
2415	!-- !-- Calculation of the forces --!
2416	!-- !-----------------------------------------------------!
2417
2418	!
2419	!-- Calculate the pre_factor for the thrust and torque forces:
2420
2421	pre_factor = 0.5_wp * (vrel(rseg)*2) 3.0_wp * &
2422	chord(rseg) * delta_r(inot) / nsegs(ring,inot)
2423
2424	!
2425	!-- Calculate the thrust force (x-component of the total force)
2426	!-- for each ring segment:
2427	thrust_seg(rseg) = pre_factor * &
2428	( turb_cl(rseg) * COS(phi_rel(rseg)) + &
2429	turb_cd(rseg) * SIN(phi_rel(rseg)) )
2430
2431	!
2432	!-- Determination of the second of the additional forces acting
2433	!-- on the flow in the azimuthal direction: force vector as basis
2434	!-- for torque (torque itself would be the vector product of the
2435	!-- radius vector and the force vector):
2436	torque_seg = pre_factor * &
2437	( turb_cl(rseg) * SIN(phi_rel(rseg)) - &
2438	turb_cd(rseg) * COS(phi_rel(rseg)) )
2439	!
2440	!-- Decomposition of the force vector into two parts:
2441	!-- One acting along the y-direction and one acting along the
2442	!-- z-direction of the rotor coordinate system:
2443
2444	torque_seg_y(rseg) = -torque_seg * sin_rot
2445	torque_seg_z(rseg) = torque_seg * cos_rot
2446
2447	!
2448	!-- Add the segment thrust to the thrust of the whole rotor
2449	!$OMP CRITICAL
2450	thrust_rotor(inot) = thrust_rotor(inot) + &
2451	thrust_seg(rseg)
2452
2453
2454	torque_total(inot) = torque_total(inot) + (torque_seg * cur_r)
2455	!$OMP END CRITICAL
2456
2457	ENDDO !-- end of loop over ring segments
2458
2459	!
2460	!-- Restore the forces into arrays containing all the segments of
2461	!-- each ring:
2462	thrust_ring(ring,:) = thrust_seg(:)
2463	torque_ring_y(ring,:) = torque_seg_y(:)
2464	torque_ring_z(ring,:) = torque_seg_z(:)
2465
2466
2467	ENDDO !-- end of loop over rings
2468	!$OMP END PARALLEL
2469
2470
2471	CALL cpu_log( log_point_s(62), 'wtm_controller', 'start' )
2472
2473
2474	IF ( speed_control ) THEN
2475	!
2476	!-- Calculation of the current generator speed for rotor speed control
2477
2478	!
2479	!-- The acceleration of the rotor speed is calculated from
2480	!-- the force balance of the accelerating torque
2481	!-- and the torque of the rotating rotor and generator
2482	om_rate = ( torque_total(inot) * air_density * gear_efficiency - &
2483	gear_ratio * torque_gen_old(inot) ) / &
2484	( rotor_inertia + &
2485	gear_ratio * gear_ratio * generator_inertia ) * dt_3d
2486
2487	!
2488	!-- The generator speed is given by the product of gear gear_ratio
2489	!-- and rotor speed
2490	generator_speed(inot) = gear_ratio * ( rotor_speed(inot) + om_rate )
2491
2492	ENDIF
2493
2494	IF ( pitch_control ) THEN
2495
2496	!
2497	!-- If the current generator speed is above rated, the pitch is not
2498	!-- saturated and the change from the last time step is within the
2499	!-- maximum pitch rate, then the pitch loop is repeated with a pitch
2500	!-- gain
2501	IF ( ( generator_speed(inot) > generator_speed_rated ) .AND. &
2502	( pitch_angle(inot) < 25.0_wp ) .AND. &
2503	( pitch_angle(inot) < pitch_angle_old(inot) + &
2504	pitch_rate * dt_3d ) ) THEN
2505	pitch_sw = .TRUE.
2506	!
2507	!-- Go back to beginning of pit_loop
2508	CYCLE pit_loop
2509	ENDIF
2510
2511	!
2512	!-- The current pitch is saved for the next time step
2513	pitch_angle_old(inot) = pitch_angle(inot)
2514	pitch_sw = .FALSE.
2515	ENDIF
2516	EXIT pit_loop
2517	ENDDO pit_loop ! Recursive pitch control loop
2518
2519
2520	!
2521	!-- Call the rotor speed controller
2522
2523	IF ( speed_control ) THEN
2524	!
2525	!-- Find processor at i_hub, j_hub
2526	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) &
2527	THEN
2528	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) )&
2529	THEN
2530	CALL wtm_speed_control( inot )
2531	ENDIF
2532	ENDIF
2533
2534	ENDIF
2535
2536
2537	CALL cpu_log( log_point_s(62), 'wtm_controller', 'stop' )
2538
2539	CALL cpu_log( log_point_s(63), 'wtm_smearing', 'start' )
2540
2541
2542	!-- !-----------------------------------------------------------------!
2543	!-- !-- Regularization kernel --!
2544	!-- !-- Smearing of the forces and interpolation to cartesian grid --!
2545	!-- !-----------------------------------------------------------------!
2546	!
2547	!-- The aerodynamic blade forces need to be distributed smoothly on
2548	!-- several mesh points in order to avoid singular behaviour
2549	!
2550	!-- Summation over sum of weighted forces. The weighting factor
2551	!-- (calculated in user_init) includes information on the distance
2552	!-- between the center of the grid cell and the rotor segment under
2553	!-- consideration
2554	!
2555	!-- To save computing time, apply smearing only for the relevant part
2556	!-- of the model domain:
2557	!
2558	!--
2559	!-- Calculation of the boundaries:
2560	i_smear(inot) = CEILING( ( rotor_radius(inot) * ABS( roty(inot,1) ) + &
2561	eps_min ) / dx )
2562	j_smear(inot) = CEILING( ( rotor_radius(inot) * ABS( roty(inot,2) ) + &
2563	eps_min ) / dy )
2564
2565	!$OMP PARALLEL PRIVATE (i, j, k, ring, rseg, flag, dist_u_3d, dist_v_3d, dist_w_3d)
2566	!$OMP DO
2567	DO i = MAX( nxl, i_hub(inot) - i_smear(inot) ), &
2568	MIN( nxr, i_hub(inot) + i_smear(inot) )
2569	DO j = MAX( nys, j_hub(inot) - j_smear(inot) ), &
2570	MIN( nyn, j_hub(inot) + j_smear(inot) )
2571	! DO k = MAX( nzb_u_inner(j,i)+1, k_hub(inot) - k_smear(inot) ), &
2572	! k_hub(inot) + k_smear(inot)
2573	DO k = nzb+1, k_hub(inot) + k_smear(inot)
2574	DO ring = 1, nrings(inot)
2575	DO rseg = 1, nsegs(ring,inot)
2576	!
2577	!-- Predetermine flag to mask topography
2578	flag = MERGE( 1.0_wp, 0.0_wp, BTEST( wall_flags_total_0(k,j,i), 1 ) )
2579
2580	!
2581	!-- Determine the square of the distance between the
2582	!-- current grid point and each rotor area segment:
2583	dist_u_3d = ( i * dx - rbx(ring,rseg) )**2 + &
2584	( j * dy + 0.5_wp * dy - rby(ring,rseg) )**2 + &
2585	( k * dz(1) - 0.5_wp * dz(1) - rbz(ring,rseg) )**2
2586	dist_v_3d = ( i * dx + 0.5_wp * dx - rbx(ring,rseg) )**2 + &
2587	( j * dy - rby(ring,rseg) )**2 + &
2588	( k * dz(1) - 0.5_wp * dz(1) - rbz(ring,rseg) )**2
2589	dist_w_3d = ( i * dx + 0.5_wp * dx - rbx(ring,rseg) )**2 + &
2590	( j * dy + 0.5_wp * dy - rby(ring,rseg) )**2 + &
2591	( k * dz(1) - rbz(ring,rseg) )**2
2592
2593	!
2594	!-- 3D-smearing of the forces with a polynomial function
2595	!-- (much faster than the old Gaussian function), using
2596	!-- some parameters that have been calculated in user_init.
2597	!-- The function is only similar to Gaussian function for
2598	!-- squared distances <= eps_min2:
2599	IF ( dist_u_3d <= eps_min2 ) THEN
2600	thrust(k,j,i) = thrust(k,j,i) + &
2601	thrust_ring(ring,rseg) * &
2602	( ( pol_a * dist_u_3d - pol_b ) * &
2603	dist_u_3d + 1.0_wp ) * eps_factor *&
2604	flag
2605	ENDIF
2606	IF ( dist_v_3d <= eps_min2 ) THEN
2607	torque_y(k,j,i) = torque_y(k,j,i) + &
2608	torque_ring_y(ring,rseg) * &
2609	( ( pol_a * dist_v_3d - pol_b ) * &
2610	dist_v_3d + 1.0_wp ) * eps_factor * &
2611	flag
2612	ENDIF
2613	IF ( dist_w_3d <= eps_min2 ) THEN
2614	torque_z(k,j,i) = torque_z(k,j,i) + &
2615	torque_ring_z(ring,rseg) * &
2616	( ( pol_a * dist_w_3d - pol_b ) * &
2617	dist_w_3d + 1.0_wp ) * eps_factor * &
2618	flag
2619	ENDIF
2620
2621	ENDDO ! End of loop over rseg
2622	ENDDO ! End of loop over ring
2623
2624	!
2625	!-- Rotation of force components:
2626	rot_tend_x(k,j,i) = rot_tend_x(k,j,i) + ( &
2627	thrust(k,j,i)*rotx(inot,1) + &
2628	torque_y(k,j,i)*roty(inot,1) + &
2629	torque_z(k,j,i)*rotz(inot,1) &
2630	) * flag
2631
2632	rot_tend_y(k,j,i) = rot_tend_y(k,j,i) + ( &
2633	thrust(k,j,i)*rotx(inot,2) + &
2634	torque_y(k,j,i)*roty(inot,2) + &
2635	torque_z(k,j,i)*rotz(inot,2) &
2636	) * flag
2637
2638	rot_tend_z(k,j,i) = rot_tend_z(k,j,i) + ( &
2639	thrust(k,j,i)*rotx(inot,3) + &
2640	torque_y(k,j,i)*roty(inot,3) + &
2641	torque_z(k,j,i)*rotz(inot,3) &
2642	) * flag
2643
2644	ENDDO ! End of loop over k
2645	ENDDO ! End of loop over j
2646	ENDDO ! End of loop over i
2647	!$OMP END PARALLEL
2648
2649	CALL cpu_log( log_point_s(63), 'wtm_smearing', 'stop' )
2650
2651	ENDDO !-- end of loop over turbines
2652
2653
2654	IF ( yaw_control ) THEN
2655	!
2656	!-- Allocate arrays for yaw control at first call
2657	!-- Can't be allocated before dt_3d is set
2658	IF ( start_up ) THEN
2659	WDLON = MAX( 1 , NINT( 30.0_wp / dt_3d ) ) ! 30s running mean array
2660	ALLOCATE( wd30(1:n_turbines,1:WDLON) )
2661	wd30 = 999.0_wp ! Set to dummy value
2662	ALLOCATE( wd30_l(1:WDLON) )
2663
2664	WDSHO = MAX( 1 , NINT( 2.0_wp / dt_3d ) ) ! 2s running mean array
2665	ALLOCATE( wd2(1:n_turbines,1:WDSHO) )
2666	wd2 = 999.0_wp ! Set to dummy value
2667	ALLOCATE( wd2_l(1:WDSHO) )
2668	start_up = .FALSE.
2669	ENDIF
2670
2671	!
2672	!-- Calculate the inflow wind speed
2673	!--
2674	!-- Loop over number of turbines:
2675	DO inot = 1, n_turbines
2676	!
2677	!-- Find processor at i_hub, j_hub
2678	IF ( ( nxl <= i_hub(inot) ) .AND. ( nxr >= i_hub(inot) ) ) &
2679	THEN
2680	IF ( ( nys <= j_hub(inot) ) .AND. ( nyn >= j_hub(inot) ) )&
2681	THEN
2682
2683	u_inflow_l(inot) = u(k_hub(inot),j_hub(inot),i_hub(inot))
2684
2685	wdir_l(inot) = -1.0_wp * ATAN2( &
2686	0.5_wp * ( v(k_hub(inot),j_hub(inot),i_hub(inot)+1) + &
2687	v(k_hub(inot),j_hub(inot),i_hub(inot)) ) , &
2688	0.5_wp * ( u(k_hub(inot),j_hub(inot)+1,i_hub(inot)) + &
2689	u(k_hub(inot),j_hub(inot),i_hub(inot)) ) )
2690
2691	CALL wtm_yawcontrol( inot )
2692
2693	yaw_angle_l(inot) = yaw_angle(inot)
2694
2695	ENDIF
2696	ENDIF
2697
2698	ENDDO !-- end of loop over turbines
2699
2700	!
2701	!-- Transfer of information to the other cpus
2702	#if defined( __parallel )
2703	CALL MPI_ALLREDUCE( u_inflow_l, u_inflow, n_turbines, MPI_REAL, &
2704	MPI_SUM, comm2d, ierr )
2705	CALL MPI_ALLREDUCE( wdir_l, wdir, n_turbines, MPI_REAL, MPI_SUM, &
2706	comm2d, ierr )
2707	CALL MPI_ALLREDUCE( yaw_angle_l, yaw_angle, n_turbines, MPI_REAL, &
2708	MPI_SUM, comm2d, ierr )
2709	#else
2710	u_inflow = u_inflow_l
2711	wdir = wdir_l
2712	yaw_angle = yaw_angle_l
2713
2714
2715	#endif
2716	DO inot = 1, n_turbines
2717	!
2718	!-- Update rotor orientation
2719	CALL wtm_rotate_rotor( inot )
2720
2721	ENDDO ! End of loop over turbines
2722
2723	ENDIF ! end of yaw control
2724
2725	IF ( speed_control ) THEN
2726	!
2727	!-- Transfer of information to the other cpus
2728	! CALL MPI_ALLREDUCE( generator_speed, generator_speed_old, n_turbines, &
2729	! MPI_REAL,MPI_SUM, comm2d, ierr )
2730	#if defined( __parallel )
2731	CALL MPI_ALLREDUCE( torque_gen, torque_gen_old, n_turbines, &
2732	MPI_REAL, MPI_SUM, comm2d, ierr )
2733	CALL MPI_ALLREDUCE( rotor_speed_l, rotor_speed, n_turbines, &
2734	MPI_REAL, MPI_SUM, comm2d, ierr )
2735	CALL MPI_ALLREDUCE( generator_speed_f, generator_speed_f_old, n_turbines, &
2736	MPI_REAL, MPI_SUM, comm2d, ierr )
2737	#else
2738	torque_gen_old = torque_gen
2739	rotor_speed = rotor_speed_l
2740	generator_speed_f_old = generator_speed_f
2741	#endif
2742
2743	ENDIF
2744
2745
2746
2747
2748	DO inot = 1, n_turbines
2749
2750
2751
2752	IF ( myid == 0 ) THEN
2753	IF ( openfile_turb_mod(400+inot)%opened ) THEN
2754	WRITE ( 400+inot, 106 ) time_since_reference_point, rotor_speed(inot), &
2755	generator_speed(inot), torque_gen_old(inot), &
2756	torque_total(inot), pitch_angle(inot), &
2757	torque_gen_old(inot)generator_speed(inot)generator_efficiency, &
2758	torque_total(inot)rotor_speed(inot)air_density, &
2759	thrust_rotor(inot), &
2760	wdir(inot)*180.0_wp/pi, &
2761	(yaw_angle(inot))*180.0_wp/pi
2762
2763	ELSE
2764
2765	WRITE ( turbine_id,'(A2,I2.2)') '_T', inot
2766	OPEN ( 400+inot, FILE=( 'WTM_OUTPUT_DATA' // &
2767	TRIM( coupling_char ) // &
2768	turbine_id ), FORM='FORMATTED' )
2769	WRITE ( 400+inot, 105 ) inot
2770	WRITE ( 400+inot, 106 ) time_since_reference_point, rotor_speed(inot), &
2771	generator_speed(inot), torque_gen_old(inot), &
2772	torque_total(inot), pitch_angle(inot), &
2773	torque_gen_old(inot)generator_speed(inot)generator_efficiency, &
2774	torque_total(inot)rotor_speed(inot)air_density, &
2775	thrust_rotor(inot), &
2776	wdir(inot)*180.0_wp/pi, &
2777	(yaw_angle(inot))*180.0_wp/pi
2778	ENDIF
2779	ENDIF
2780
2781	!-- Set open flag
2782	openfile_turb_mod(400+inot)%opened = .TRUE.
2783	ENDDO !-- end of loop over turbines
2784
2785
2786
2787	ENDIF
2788
2789
2790	CALL cpu_log( log_point_s(61), 'wtm_forces', 'stop' )
2791
2792	!
2793	!-- Formats
2794	105 FORMAT ('Turbine control data for turbine ',I2,1X,':'/ &
2795	&'----------------------------------------'/ &
2796	&' Time RSpeed GSpeed GenTorque AeroTorque ', &
2797	'Pitch Power(Gen) Power(Rot) RotThrust WDirection ', &
2798	'YawOrient')
2799
2800	106 FORMAT (F9.2,2X,F7.3,2X,F7.2,2X,F12.1,3X,F12.1,1X,F6.2,2X,F12.1,2X, &
2801	F12.1,1X,F12.1,4X,F7.2,4X,F7.2)
2802
2803
2804
2805	END SUBROUTINE wtm_forces
2806
2807
2808	!------------------------------------------------------------------------------!
2809	! Description:
2810	! ------------
2811	!> Yaw controller for the wind turbine model
2812	!------------------------------------------------------------------------------!
2813	SUBROUTINE wtm_yawcontrol( inot )
2814
2815	USE kinds
2816
2817	IMPLICIT NONE
2818
2819	INTEGER(iwp) :: inot
2820	INTEGER(iwp) :: i_wd_30
2821	REAL(wp) :: missal
2822
2823	i_wd_30 = 0_iwp
2824
2825	!
2826	!-- The yaw controller computes a 30s running mean of the wind direction.
2827	!-- If the difference between turbine alignment and wind direction exceeds
2828	!-- 5 degrees, the turbine is yawed. The mechanism stops as soon as the 2s-running
2829	!-- mean of the missalignment is smaller than 0.5 degrees.
2830	!-- Attention: If the timestep during the simulation changes significantly
2831	!-- the lengths of the running means change and it does not correspond to
2832	!-- 30s/2s anymore.
2833	!-- ! Needs to be modified for these situations !
2834	!-- For wind from the east, the averaging of the wind direction could cause
2835	!-- problems and the yaw controller is probably flawed. -> Routine for
2836	!-- averaging needs to be improved!
2837	!
2838	!-- Check if turbine is not yawing
2839	IF ( .NOT. doyaw(inot) ) THEN
2840	!
2841	!-- Write current wind direction into array
2842	wd30_l = wd30(inot,:)
2843	wd30_l = CSHIFT( wd30_l, SHIFT=-1 )
2844	wd30_l(1) = wdir(inot)
2845	!
2846	!-- Check if array is full ( no more dummies )
2847	IF ( .NOT. ANY( wd30_l == 999.) ) THEN
2848
2849	missal = SUM( wd30_l ) / SIZE( wd30_l ) - yaw_angle(inot)
2850	!
2851	!-- Check if turbine is missaligned by more than yaw_misalignment_max
2852	IF ( ABS( missal ) > yaw_misalignment_max ) THEN
2853	!
2854	!-- Check in which direction to yaw
2855	yawdir(inot) = SIGN( 1.0_wp, missal )
2856	!
2857	!-- Start yawing of turbine
2858	yaw_angle(inot) = yaw_angle(inot) + yawdir(inot) * yaw_speed * dt_3d
2859	doyaw(inot) = .TRUE.
2860	wd30_l = 999. ! fill with dummies again
2861	ENDIF
2862	ENDIF
2863
2864	wd30(inot,:) = wd30_l
2865
2866	!
2867	!-- If turbine is already yawing:
2868	!-- Initialize 2 s running mean and yaw until the missalignment is smaller
2869	!-- than yaw_misalignment_min
2870
2871	ELSE
2872	!
2873	!-- Initialize 2 s running mean
2874	wd2_l = wd2(inot,:)
2875	wd2_l = CSHIFT( wd2_l, SHIFT = -1 )
2876	wd2_l(1) = wdir(inot)
2877	!
2878	!-- Check if array is full ( no more dummies )
2879	IF ( .NOT. ANY( wd2_l == 999.0_wp ) ) THEN
2880	!
2881	!-- Calculate missalignment of turbine
2882	missal = SUM( wd2_l - yaw_angle(inot) ) / SIZE( wd2_l )
2883	!
2884	!-- Check if missalignment is still larger than 0.5 degree and if the
2885	!-- yaw direction is still right
2886	IF ( ( ABS( missal ) > yaw_misalignment_min ) .AND. &
2887	( yawdir(inot) == SIGN( 1.0_wp, missal ) ) ) THEN
2888	!
2889	!-- Continue yawing
2890	yaw_angle(inot) = yaw_angle(inot) + yawdir(inot) * yaw_speed * dt_3d
2891	ELSE
2892	!
2893	!-- Stop yawing
2894	doyaw(inot) = .FALSE.
2895	wd2_l = 999.0_wp ! fill with dummies again
2896	ENDIF
2897	ELSE
2898	!
2899	!-- Continue yawing
2900	yaw_angle(inot) = yaw_angle(inot) + yawdir(inot) * yaw_speed * dt_3d
2901	ENDIF
2902
2903	wd2(inot,:) = wd2_l
2904
2905	ENDIF
2906
2907	END SUBROUTINE wtm_yawcontrol
2908
2909
2910	!------------------------------------------------------------------------------!
2911	! Description:
2912	! ------------
2913	!> Initialization of the speed control
2914	!------------------------------------------------------------------------------!
2915	SUBROUTINE wtm_init_speed_control
2916
2917
2918	IMPLICIT NONE
2919
2920	!
2921	!-- If speed control is set, remaining variables and control_parameters for
2922	!-- the control algorithm are calculated
2923	!
2924	!-- Calculate slope constant for region 15
2925	slope15 = ( region_2_slope * region_2_min * region_2_min ) / &
2926	( region_2_min - region_15_min )
2927	!
2928	!-- Calculate upper limit of slipage region
2929	vs_sysp = generator_speed_rated / 1.1_wp
2930	!
2931	!-- Calculate slope of slipage region
2932	region_25_slope = ( generator_power_rated / generator_speed_rated ) / &
2933	( generator_speed_rated - vs_sysp )
2934	!
2935	!-- Calculate lower limit of slipage region
2936	region_25_min = ( region_25_slope - SQRT( region_25_slope * &
2937	( region_25_slope - 4.0_wp * region_2_slope * vs_sysp ) ) ) / &
2938	( 2.0_wp * region_2_slope )
2939	!
2940	!-- Frequency for the simple low pass filter
2941	Fcorner = 0.25_wp
2942	!
2943	!-- At the first timestep the torque is set to its maximum to prevent
2944	!-- an overspeeding of the rotor
2945	IF ( TRIM( initializing_actions ) /= 'read_restart_data' ) THEN
2946	torque_gen_old(:) = generator_torque_max
2947	ENDIF
2948
2949	END SUBROUTINE wtm_init_speed_control
2950
2951
2952	!------------------------------------------------------------------------------!
2953	! Description:
2954	! ------------
2955	!> Simple controller for the regulation of the rotor speed
2956	!------------------------------------------------------------------------------!
2957	SUBROUTINE wtm_speed_control( inot )
2958
2959
2960	IMPLICIT NONE
2961
2962	INTEGER(iwp) :: inot
2963
2964
2965
2966	!
2967	!-- The controller is based on the fortran script from Jonkman
2968	!-- et al. 2009 "Definition of a 5 MW Reference Wind Turbine for
2969	!-- offshore system developement"
2970
2971	!
2972	!-- The generator speed is filtered by a low pass filter
2973	!-- for the control of the generator torque
2974	lp_coeff = EXP( -2.0_wp * 3.14_wp * dt_3d * Fcorner )
2975	generator_speed_f(inot) = ( 1.0_wp - lp_coeff ) * generator_speed(inot) + lp_coeff *&
2976	generator_speed_f_old(inot)
2977
2978	IF ( generator_speed_f(inot) <= region_15_min ) THEN
2979	!
2980	!-- Region 1: Generator torque is set to zero to accelerate the rotor:
2981	torque_gen(inot) = 0
2982
2983	ELSEIF ( generator_speed_f(inot) <= region_2_min ) THEN
2984	!
2985	!-- Region 1.5: Generator torque is increasing linearly with rotor speed:
2986	torque_gen(inot) = slope15 * ( generator_speed_f(inot) - region_15_min )
2987
2988	ELSEIF ( generator_speed_f(inot) <= region_25_min ) THEN
2989	!
2990	!-- Region 2: Generator torque is increased by the square of the generator
2991	!-- speed to keep the TSR optimal:
2992	torque_gen(inot) = region_2_slope * generator_speed_f(inot) * generator_speed_f(inot)
2993
2994	ELSEIF ( generator_speed_f(inot) < generator_speed_rated ) THEN
2995	!
2996	!-- Region 2.5: Slipage region between 2 and 3:
2997	torque_gen(inot) = region_25_slope * ( generator_speed_f(inot) - vs_sysp )
2998
2999	ELSE
3000	!
3001	!-- Region 3: Generator torque is antiproportional to the rotor speed to
3002	!-- keep the power constant:
3003	torque_gen(inot) = generator_power_rated / generator_speed_f(inot)
3004
3005	ENDIF
3006	!
3007	!-- Calculate torque rate and confine with a max
3008	trq_rate = ( torque_gen(inot) - torque_gen_old(inot) ) / dt_3d
3009	trq_rate = MIN( MAX( trq_rate, -1.0_wp * generator_torque_rate_max ), &
3010	generator_torque_rate_max )
3011	!
3012	!-- Calculate new gen torque and confine with max torque
3013	torque_gen(inot) = torque_gen_old(inot) + trq_rate * dt_3d
3014	torque_gen(inot) = MIN( torque_gen(inot), generator_torque_max )
3015	!
3016	!-- Overwrite values for next timestep
3017	rotor_speed_l(inot) = generator_speed(inot) / gear_ratio
3018
3019
3020	END SUBROUTINE wtm_speed_control
3021
3022
3023	!------------------------------------------------------------------------------!
3024	! Description:
3025	! ------------
3026	!> Application of the additional forces generated by the wind turbine on the
3027	!> flow components (tendency terms)
3028	!> Call for all grid points
3029	!------------------------------------------------------------------------------!
3030	SUBROUTINE wtm_actions( location )
3031
3032
3033	CHARACTER (LEN=*) :: location !<
3034
3035	INTEGER(iwp) :: i !< running index
3036	INTEGER(iwp) :: j !< running index
3037	INTEGER(iwp) :: k !< running index
3038
3039
3040	SELECT CASE ( location )
3041
3042	CASE ( 'before_timestep' )
3043
3044	CALL wtm_forces
3045
3046	CASE ( 'u-tendency' )
3047	!
3048	!-- Apply the x-component of the force to the u-component of the flow:
3049	IF ( time_since_reference_point >= time_turbine_on ) THEN
3050	DO i = nxlg, nxrg
3051	DO j = nysg, nyng
3052	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
3053	!
3054	!-- Calculate the thrust generated by the nacelle and the tower
3055	tend_nac_x = 0.5_wp * nac_cd_surf(k,j,i) * &
3056	SIGN( u(k,j,i)**2 , u(k,j,i) )
3057	tend_tow_x = 0.5_wp * tow_cd_surf(k,j,i) * &
3058	SIGN( u(k,j,i)**2 , u(k,j,i) )
3059
3060	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_x(k,j,i) &
3061	- tend_nac_x - tend_tow_x ) &
3062	* MERGE( 1.0_wp, 0.0_wp, &
3063	BTEST( wall_flags_total_0(k,j,i), 1 ) )
3064	ENDDO
3065	ENDDO
3066	ENDDO
3067	ENDIF
3068
3069	CASE ( 'v-tendency' )
3070	!
3071	!-- Apply the y-component of the force to the v-component of the flow:
3072	IF ( time_since_reference_point >= time_turbine_on ) THEN
3073	DO i = nxlg, nxrg
3074	DO j = nysg, nyng
3075	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
3076	tend_nac_y = 0.5_wp * nac_cd_surf(k,j,i) * &
3077	SIGN( v(k,j,i)**2 , v(k,j,i) )
3078	tend_tow_y = 0.5_wp * tow_cd_surf(k,j,i) * &
3079	SIGN( v(k,j,i)**2 , v(k,j,i) )
3080	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_y(k,j,i) &
3081	- tend_nac_y - tend_tow_y ) &
3082	* MERGE( 1.0_wp, 0.0_wp, &
3083	BTEST( wall_flags_total_0(k,j,i), 2 ) )
3084	ENDDO
3085	ENDDO
3086	ENDDO
3087	ENDIF
3088
3089	CASE ( 'w-tendency' )
3090	!
3091	!-- Apply the z-component of the force to the w-component of the flow:
3092	IF ( time_since_reference_point >= time_turbine_on ) THEN
3093	DO i = nxlg, nxrg
3094	DO j = nysg, nyng
3095	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
3096	tend(k,j,i) = tend(k,j,i) - rot_tend_z(k,j,i) &
3097	* MERGE( 1.0_wp, 0.0_wp, &
3098	BTEST( wall_flags_total_0(k,j,i), 3 ) )
3099	ENDDO
3100	ENDDO
3101	ENDDO
3102	ENDIF
3103
3104
3105	CASE DEFAULT
3106	CONTINUE
3107
3108	END SELECT
3109
3110
3111	END SUBROUTINE wtm_actions
3112
3113
3114	!------------------------------------------------------------------------------!
3115	! Description:
3116	! ------------
3117	!> Application of the additional forces generated by the wind turbine on the
3118	!> flow components (tendency terms)
3119	!> Call for grid point i,j
3120	!------------------------------------------------------------------------------!
3121	SUBROUTINE wtm_actions_ij( i, j, location )
3122
3123
3124	CHARACTER (LEN=*) :: location !<
3125	INTEGER(iwp) :: i !< running index
3126	INTEGER(iwp) :: j !< running index
3127	INTEGER(iwp) :: k !< running index
3128
3129	SELECT CASE ( location )
3130
3131	CASE ( 'before_timestep' )
3132
3133	CALL wtm_forces
3134
3135	CASE ( 'u-tendency' )
3136	!
3137	!-- Apply the x-component of the force to the u-component of the flow:
3138	IF ( time_since_reference_point >= time_turbine_on ) THEN
3139	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
3140	!
3141	!-- Calculate the thrust generated by the nacelle and the tower
3142	tend_nac_x = 0.5_wp * nac_cd_surf(k,j,i) * &
3143	SIGN( u(k,j,i)**2 , u(k,j,i) )
3144	tend_tow_x = 0.5_wp * tow_cd_surf(k,j,i) * &
3145	SIGN( u(k,j,i)**2 , u(k,j,i) )
3146	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_x(k,j,i) &
3147	- tend_nac_x - tend_tow_x ) &
3148	* MERGE( 1.0_wp, 0.0_wp, &
3149	BTEST( wall_flags_total_0(k,j,i), 1 ) )
3150	ENDDO
3151	ENDIF
3152
3153	CASE ( 'v-tendency' )
3154	!
3155	!-- Apply the y-component of the force to the v-component of the flow:
3156	IF ( time_since_reference_point >= time_turbine_on ) THEN
3157	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
3158	tend_nac_y = 0.5_wp * nac_cd_surf(k,j,i) * &
3159	SIGN( v(k,j,i)**2 , v(k,j,i) )
3160	tend_tow_y = 0.5_wp * tow_cd_surf(k,j,i) * &
3161	SIGN( v(k,j,i)**2 , v(k,j,i) )
3162	tend(k,j,i) = tend(k,j,i) + ( - rot_tend_y(k,j,i) &
3163	- tend_nac_y - tend_tow_y ) &
3164	* MERGE( 1.0_wp, 0.0_wp, &
3165	BTEST( wall_flags_total_0(k,j,i), 2 ) )
3166	ENDDO
3167	ENDIF
3168
3169	CASE ( 'w-tendency' )
3170	!
3171	!-- Apply the z-component of the force to the w-component of the flow:
3172	IF ( time_since_reference_point >= time_turbine_on ) THEN
3173	DO k = nzb+1, MAXVAL(k_hub) + MAXVAL(k_smear)
3174	tend(k,j,i) = tend(k,j,i) - rot_tend_z(k,j,i) &
3175	* MERGE( 1.0_wp, 0.0_wp, &
3176	BTEST( wall_flags_total_0(k,j,i), 3 ) )
3177	ENDDO
3178	ENDIF
3179
3180
3181	CASE DEFAULT
3182	CONTINUE
3183
3184	END SELECT
3185
3186
3187	END SUBROUTINE wtm_actions_ij
3188
3189
3190	SUBROUTINE wtm_data_output
3191
3192
3193	INTEGER(iwp) :: t_ind = 0 !< time index
3194
3195	INTEGER(iwp) :: return_value !< returned status value of called function
3196
3197	IF ( myid == 0 ) THEN
3198
3199	!
3200	!-- At the first call of this routine write the spatial coordinates.
3201	IF ( .NOT. initial_write_coordinates ) THEN
3202	ALLOCATE ( output_values_1d_target(1:n_turbines) )
3203	output_values_1d_target = hub_x(1:n_turbines)
3204	output_values_1d_pointer => output_values_1d_target
3205	return_value = dom_write_var( nc_filename, &
3206	'x', &
3207	values_realwp_1d = output_values_1d_pointer, &
3208	bounds_start = (/1/), &
3209	bounds_end = (/n_turbines/) )
3210
3211	output_values_1d_target = hub_y(1:n_turbines)
3212	output_values_1d_pointer => output_values_1d_target
3213	return_value = dom_write_var( nc_filename, &
3214	'y', &
3215	values_realwp_1d = output_values_1d_pointer, &
3216	bounds_start = (/1/), &
3217	bounds_end = (/n_turbines/) )
3218
3219	output_values_1d_target = hub_z(1:n_turbines)
3220	output_values_1d_pointer => output_values_1d_target
3221	return_value = dom_write_var( nc_filename, &
3222	'z', &
3223	values_realwp_1d = output_values_1d_pointer, &
3224	bounds_start = (/1/), &
3225	bounds_end = (/n_turbines/) )
3226
3227	initial_write_coordinates = .TRUE.
3228	DEALLOCATE ( output_values_1d_target )
3229	ENDIF
3230
3231	t_ind = t_ind + 1
3232
3233	ALLOCATE ( output_values_1d_target(1:n_turbines) )
3234	output_values_1d_target = rotor_speed(:)
3235	output_values_1d_pointer => output_values_1d_target
3236
3237	return_value = dom_write_var( nc_filename, &
3238	'rotor_speed', &
3239	values_realwp_1d = output_values_1d_pointer, &
3240	bounds_start = (/1, t_ind/), &
3241	bounds_end = (/n_turbines, t_ind /) )
3242
3243	output_values_1d_target = generator_speed(:)
3244	output_values_1d_pointer => output_values_1d_target
3245	return_value = dom_write_var( nc_filename, &
3246	'generator_speed', &
3247	values_realwp_1d = output_values_1d_pointer, &
3248	bounds_start = (/1, t_ind/), &
3249	bounds_end = (/n_turbines, t_ind /) )
3250
3251	output_values_1d_target = torque_gen_old(:)
3252	output_values_1d_pointer => output_values_1d_target
3253
3254	return_value = dom_write_var( nc_filename, &
3255	'generator_torque', &
3256	values_realwp_1d = output_values_1d_pointer, &
3257	bounds_start = (/1, t_ind/), &
3258	bounds_end = (/n_turbines, t_ind /) )
3259
3260	output_values_1d_target = torque_total(:)
3261	output_values_1d_pointer => output_values_1d_target
3262
3263	return_value = dom_write_var( nc_filename, &
3264	'rotor_torque', &
3265	values_realwp_1d = output_values_1d_pointer, &
3266	bounds_start = (/1, t_ind/), &
3267	bounds_end = (/n_turbines, t_ind /) )
3268
3269	output_values_1d_target = pitch_angle(:)
3270	output_values_1d_pointer => output_values_1d_target
3271
3272	return_value = dom_write_var( nc_filename, &
3273	'pitch_angle', &
3274	values_realwp_1d = output_values_1d_pointer, &
3275	bounds_start = (/1, t_ind/), &
3276	bounds_end = (/n_turbines, t_ind /) )
3277
3278	output_values_1d_target = torque_gen_old(:)generator_speed(:)generator_efficiency
3279	output_values_1d_pointer => output_values_1d_target
3280
3281	return_value = dom_write_var( nc_filename, &
3282	'generator_power', &
3283	values_realwp_1d = output_values_1d_pointer, &
3284	bounds_start = (/1, t_ind/), &
3285	bounds_end = (/n_turbines, t_ind /) )
3286
3287	DO inot = 1, n_turbines
3288	output_values_1d_target(inot) = torque_total(inot)rotor_speed(inot)air_density
3289	ENDDO
3290	output_values_1d_pointer => output_values_1d_target
3291
3292	return_value = dom_write_var( nc_filename, &
3293	'rotor_power', &
3294	values_realwp_1d = output_values_1d_pointer, &
3295	bounds_start = (/1, t_ind/), &
3296	bounds_end = (/n_turbines, t_ind /) )
3297
3298	output_values_1d_target = thrust_rotor(:)
3299	output_values_1d_pointer => output_values_1d_target
3300
3301	return_value = dom_write_var( nc_filename, &
3302	'rotor_thrust', &
3303	values_realwp_1d = output_values_1d_pointer, &
3304	bounds_start = (/1, t_ind/), &
3305	bounds_end = (/n_turbines, t_ind /) )
3306
3307	output_values_1d_target = wdir(:)*180.0_wp/pi
3308	output_values_1d_pointer => output_values_1d_target
3309
3310	return_value = dom_write_var( nc_filename, &
3311	'wind_direction', &
3312	values_realwp_1d = output_values_1d_pointer, &
3313	bounds_start = (/1, t_ind/), &
3314	bounds_end = (/n_turbines, t_ind /) )
3315
3316	output_values_1d_target = (yaw_angle(:))*180.0_wp/pi
3317	output_values_1d_pointer => output_values_1d_target
3318
3319	return_value = dom_write_var( nc_filename, &
3320	'yaw_angle', &
3321	values_realwp_1d = output_values_1d_pointer, &
3322	bounds_start = (/1, t_ind/), &
3323	bounds_end = (/n_turbines, t_ind /) )
3324
3325	output_values_0d_target = time_since_reference_point
3326	output_values_0d_pointer => output_values_0d_target
3327
3328	return_value = dom_write_var( nc_filename, &
3329	'time', &
3330	values_realwp_0d = output_values_0d_pointer, &
3331	bounds_start = (/t_ind/), &
3332	bounds_end = (/t_ind/) )
3333
3334	DEALLOCATE ( output_values_1d_target )
3335
3336	ENDIF
3337
3338	END SUBROUTINE wtm_data_output
3339
3340	END MODULE wind_turbine_model_mod

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