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Update api_change.rst for added mass, inertia, and wave-current coupling changes
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‎docs/source/user/api_change.rst‎

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@@ -9,6 +9,66 @@ The changes are tabulated according to the module input file, line number, and f
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The line number corresponds to the resulting line number after all changes are implemented.
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Thus, be sure to implement each in order so that subsequent line numbers are correct.
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OpenFAST v4.0.3 to OpenFAST dev
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----------------------------------
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Added mass and fluid inertia loads were added to the rotor blades and tower in AeroDyn.
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This results in new columns in the AeroDyn blade input file and new columns in the
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"Tower Influence and Aerodynamics" section of the AeroDyn primary input file. Given the
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addition of these loads, the Buoyancy flag was also removed, and the buoyancy, added mass,
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and inertia loads can all be turned off by setting the appropriate coefficients to zero
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rather than via a separate flag for each.
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Superposition of wave and current velocities between InflowWind and SeaState was enabled,
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which requires a "SeaState Data" section in the AeroDyn driver input file.
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============================================= ======== ==================== ========================================================================================================================================================================================================
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Added in OpenFAST `dev`
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------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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Module Line Flag Name Example Value
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============================================= ======== ==================== ========================================================================================================================================================================================================
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AeroDyn blade file t_c 0.8651 [additional column in *Blade Properties* table]
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AeroDyn blade file BlCpn 1.0 [additional column in *Blade Properties* table]
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AeroDyn blade file BlCpt 1.0 [additional column in *Blade Properties* table]
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AeroDyn blade file BlCan 6.8459E+00 [additional column in *Blade Properties* table]
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AeroDyn blade file BlCat 5.4605E-01 [additional column in *Blade Properties* table]
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AeroDyn blade file BlCam 5.5180E-02 [additional column in *Blade Properties* table]
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AeroDyn driver 23 ----- SeaState Data [used only when MHK = 1 or 2] ---------------------------------------
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AeroDyn driver 24 CompSeaSt 1 CompSeaSt - Compute wave velocities (switch) {0=No Waves; 1=SeaState}
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AeroDyn driver 25 SeaStFile "MHK_RM1_Fixed_SeaState.dat" SeaStFile - Name of the SeaState input file [used only when CompSeaSt=1]
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AeroDyn \* TwrCp 1.0 [additional column in *Tower Influence and Aerodynamics* table]
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AeroDyn \* TwrCa 1.0 [additional column in *Tower Influence and Aerodynamics* table]
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============================================= ======== ==================== ========================================================================================================================================================================================================
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============================================= ======== ==================== ========================================================================================================================================================================================================
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Modified in OpenFAST `dev`
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------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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Module Line Flag Name Example Value
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============================================= ======== ==================== ========================================================================================================================================================================================================
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AeroDyn blade file 5 BlSpn BlCrvAC BlSwpAC BlCrvAng BlTwist BlChord BlAFID t_c BlCb BlCenBn BlCenBt BlCpn BlCpt BlCan BlCat BlCam
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AeroDyn blade file 6 (m) (m) (m) (deg) (deg) (m) (-) (-) (-) (m) (m) (-) (-) (-) (-) (-)
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AeroDyn \* ====== Hub Properties ============================================================================== [used only when MHK=1 or 2]
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AeroDyn \* ====== Nacelle Properties ========================================================================== [used only when MHK=1 or 2 or when NacelleDrag=True]
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AeroDyn \* ====== Tower Influence and Aerodynamics ============================================================ [used only when TwrPotent/=0, TwrShadow/=0, TwrAero=True, or MHK=1 or 2]
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AeroDyn \* NumTwrNds 5 NumTwrNds - Number of tower nodes used in the analysis (-) [used only when TwrPotent/=0, TwrShadow/=0, TwrAero=True, or MHK=1 or 2]
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AeroDyn \* TwrElev TwrDiam TwrCd TwrTI TwrCb TwrCp TwrCa !TwrTI used only with TwrShadow=2, TwrCb/TwrCp/TwrCa used only with MHK=1 or 2
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AeroDyn \* (m) (m) (-) (-) (-) (-) (-)
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============================================= ======== ==================== ========================================================================================================================================================================================================
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============================================= ======== ==================== ========================================================================================================================================================================================================
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Removed in OpenFAST `dev`
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------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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Module Line Flag Name Example Value
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============================================= ======== ==================== ========================================================================================================================================================================================================
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AeroDyn 11 Buoyancy False Buoyancy - Include buoyancy effects? (flag)
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============================================= ======== ==================== ========================================================================================================================================================================================================
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OpenFAST v4.0.3 to OpenFAST v4.1.0
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----------------------------------
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Supercontroller module has been removed from FAST.Farm.

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