Thanks a lot for the reply dear @Jason.Jonkman
From Definition of parametersI found the following equations. Should the AeroTwist be in “radians” since for my calculations for upwind turbine its coming as +ve.
BlCrvAC and BlSwpAC are related to AeroCent and AeroTwist from FAST v7.02 as follows:
BlCrvAC = -(0.25-AeroCent)Chord SIN(AeroTwst)
BlSwpAC = -(0.25-AeroCent)Chord COS(AeroTwst)