Which tip loss model is used in WT_perf

Wind & Water Computer-Aided Engineering Software Tools
1

Hi all,

I wonder which tip loss model is used in the WT_perf design code. I can not reproduce the tip loss function in the output file. I use the Prandtl tip loss function. At the root the values are the same. But then the values of the tip loss functions diverge to the tip.

Thanks

Andreas

2

WT_Perf uses the Prandtl model. Would you please give more details about what you mean by “But then the values of the tip loss functions diverge to the tip.”?

3

With diverge at the tip I meant that my own code gave other values for the Prandtl tip los function, at the tip, as WT_perf did.
I used the tip loss model from the following paper:

Tip Loss Corrections for Wind
Turbine Computations
Wen Zhong Shen*, Robert Mikkelsen and Jens Nørkær Sørensen

I think that was the reason for the different values at the tip. WT_perf works perfectly well.

Thank you

Andreas

4

That’s good to know. We’ve been using that tip-loss model for decades! :stuck_out_tongue: