Azimuth - AeroDyn and ElastoDyn outputs

[Cardoza2]

All,
I've been analyzing a simplified version of the NREL 5MW (files attached below). I noticed that AeroDyn puts out interesting results for the azimuth (B1Azimuth) as compared to the azimuthal position from ElastoDyn (Azimuth).

I recognize these are slightly different quantities, but I expected AD to return something closer to what comes out of ED. Is this what is expected? If so, what is the meaning of B1Azimuth? If this isn't expected, is there a setting that might make this happen? If you have any thoughts, that would be super helpful. Thanks in advance,

Adam

sn5.zip

[jjonkman]

Dear @Cardoza2,

The blade azimuth angle output from AeroDyn v15 is not the rigid-body rotation of the rotor, but defines the orientation of blade relative to skewed inflow–see the following topic on our forum for more information: https://forums.nrel.gov/t/azimuth-angle-of-the-blade/1464.

The Azimuth output from ElastoDyn is likely more in line with what you expect.

Best regards,

[Cardoza2]

Thanks Jason, I forgot to check the forum.