Spanwise thrust/power along the blade?

Wind & Water Computer-Aided Engineering Software Tools
3

Dear @Jason.Jonkman ,

Thank you very much for your answer. I have another follow-up question about computing the induction factors (axial and tangential).

I am coupling FAST with a CFD solver so I disabled the wake model (set to None instead of SWIRL/WAKE) which means that Aerodynv14 will report a value of 0 for both AxInd and TanInd.

I have the 3 velocity components (VX/VY/VZ) from the `.wind` file from Aerodyn14 when using the option PRINT WIND. (from this post)

My approach to compute the axial induction at each blade node:

  • Compute the wind speed normal to the rotor plane, U, and compute AxInd = 1 - U/Uinf.
  • To compute the TanInd:
    • Compute the relative speed from the Dynamic pressure output: W = sqrt(2*DynPres/AirDens).
    • Compute the inflow angle: PHI = Alpha + Pitch
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    • Compute the Tangential relative speed: VT = W * COS(PHI).
    • Compute TanInd from the relation: VT = r*Omega (1 + tanInd).

I appreciate your feedback/corrections.

Best regards,

Y.Thiziri