Question about the rotor performance difference between IEA-22-280-RWT_tabular.xlsx and the Definition of the IEA Wind 22-Megawatt Offshore Reference Wind Turbine

[haoran-Wang-1023]

Hello,

I am comparing the rotor performance curves from two sources: the IEA-22-280-RWT_tabular.xlsx file downloaded from this GitHub repository and the technical report Definition of the IEA Wind 22-Megawatt Offshore Reference Wind Turbine. However, I noticed that the pitch angles corresponding to different wind speeds in the spreadsheet differ from those in Table 7 of the technical report.

Could this discrepancy be due to the fact that the wind speeds in the report represent steady-state operating conditions? Can you explain why the pitch angle values in these two sources differ?

Best regards,

[fzahle]

Hi @haoran-Wang-1023

The data in the report is computed using HAWC2 considering flexibility and torsion of the blades, while the data in the excel is computed using NREL’s CCBlade with no elasticity. Both the pitch schedule snd overall rotor efficiency differ significantly as a consequence.

You can find the pitch schedule and rotor performance computed with HAWC2 and OpenFAST here, which should correspond (reasonably) to what’s in the report. There will of course be slight differences between the two codes.

https://github.com/IEAWindTask37/IEA-22-280-RWT/tree/main/outputs/01_steady_states

[gbarter]

I just created PR #113 , which should address this confusion. Apologies that this wasn't done far sooner.

[fzahle]

I believe the above answer from @gbarter should resolve the discussion?