Rotationally sampled wind

Discuss the effects of turbulence on wind turbines and its simulation.

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KumaraRaja.Eedara
Posts: 30
Joined: Mon Sep 12, 2016 8:34 pm
Organization: IIT Bombay
Location: Mumbai

Rotationally sampled wind

Postby KumaraRaja.Eedara » Sat Oct 05, 2019 3:55 am

Dear all,

After performing simulation (with turbsim generated wind file *.bts as input) in FAST, I've extracted the wind velocities (Vx, Vy, Vz) from the .out file generated by FAST. Is this rotationally sampled wind ? or Eulerian wind measurement (i.e wind measured at an inertial location) ? My understanding is, it is the later (Eulerian wind measurement) ?

Regards,
Kumara

Jason.Jonkman
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Re: Rotationally sampled wind

Postby Jason.Jonkman » Sat Oct 05, 2019 9:14 am

Dear Kumara,

You haven't stated which FAST outputs you are using. In general, wind output at fixed points would be in the inertial frame and wind output in a frame rotating with the rotor would be rotationally sampled. For example, output Wind1VelX from InflowWind would be in the inertial frame and output B1N1VUndx from AeroDyn v15 would be rotationally sampled.

Best regards,
Jason Jonkman, Ph.D.
Senior Engineer | National Wind Technology Center (NWTC)

National Renewable Energy Laboratory (NREL)
15013 Denver West Parkway | Golden, CO 80401
+1 (303) 384 – 7026 | Fax: +1 (303) 384 – 6901
nwtc.nrel.gov

KumaraRaja.Eedara
Posts: 30
Joined: Mon Sep 12, 2016 8:34 pm
Organization: IIT Bombay
Location: Mumbai

Re: Rotationally sampled wind

Postby KumaraRaja.Eedara » Sat Oct 05, 2019 11:10 am

Dear Jason,

I was talking about "Wind1VelX". Thanks for the clarification.

Regards,
Kumara


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