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Catch divide-by-zero error in wind speed estimator #410

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merged 3 commits into from
Dec 27, 2024
Merged

Catch divide-by-zero error in wind speed estimator #410

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e41f5c5
ability to load rosco yaml on rank 0 alone
ptrbortolotti Dec 20, 2024
858a346
Catch divide-by-zero in WSE
dzalkind Dec 27, 2024
802cbbb
Merge remote-tracking branch 'origin/main' into wse_dbz
dzalkind Dec 27, 2024
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2 changes: 1 addition & 1 deletion Examples/28_tower_resonance.py
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Expand Up @@ -65,7 +65,7 @@ def main():
# Ramp: good demo of functionality, short for CI
r.wind_case_fcn = cl.ramp
r.wind_case_opts = {
'U_start': 4, # from 10 to 15 m/s
'U_start': 0, # from 10 to 15 m/s
'U_end': 10,
't_start': 100,
't_end': 300
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1 change: 1 addition & 0 deletions rosco/controller/src/ControllerBlocks.f90
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Expand Up @@ -282,6 +282,7 @@ SUBROUTINE WindSpeedEstimator(LocalVar, CntrPar, objInst, PerfData, DebugVar, Er
LocalVar%WE%v_t = 0.0
LocalVar%WE%v_m = max(LocalVar%HorWindV, 3.0_DbKi) ! avoid divide by 0 below if HorWindV is 0, which some AMRWind setups create
LocalVar%WE%v_h = max(LocalVar%HorWindV, 3.0_DbKi) ! avoid divide by 0 below if HorWindV is 0, which some AMRWind setups create
LocalVar%WE_Vw = LocalVar%WE%v_m + LocalVar%WE%v_t ! Initialize WE_Vw to aviod divide by zero
lambda = WE_Inp_Speed * CntrPar%WE_BladeRadius/LocalVar%WE%v_h
LocalVar%WE%xh = RESHAPE((/LocalVar%WE%om_r, LocalVar%WE%v_t, LocalVar%WE%v_m/),(/3,1/))
LocalVar%WE%P = RESHAPE((/0.01, 0.0, 0.0, 0.0, 0.01, 0.0, 0.0, 0.0, 1.0/),(/3,3/))
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4 changes: 3 additions & 1 deletion rosco/controller/src/Functions.f90
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Expand Up @@ -575,12 +575,14 @@ REAL(DbKi) FUNCTION AeroDynTorque(RotSpeed, BldPitch, LocalVar, CntrPar, PerfDat
REAL(DbKi) :: RotorArea
REAL(DbKi) :: Cp
REAL(DbKi) :: Lambda
REAL(DbKi) :: WindSpeed

CHARACTER(*), PARAMETER :: RoutineName = 'AeroDynTorque'

! Find Torque
RotorArea = PI*CntrPar%WE_BladeRadius**2
Lambda = RotSpeed*CntrPar%WE_BladeRadius/LocalVar%WE_Vw
WindSpeed = MAX(LocalVar%WE_Vw,EPSILON(1.0_DbKi))
Lambda = RotSpeed*CntrPar%WE_BladeRadius/WindSpeed

! Compute Cp
Cp = interp2d(PerfData%Beta_vec,PerfData%TSR_vec,PerfData%Cp_mat, BldPitch*R2D, Lambda, ErrVar)
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