FAST Simulation with fixed turbulence intensity

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

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Piero.Mazza
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Joined: Fri May 31, 2019 12:13 am
Organization: TU Delft
Location: The Netherlands

FAST Simulation with fixed turbulence intensity

Postby Piero.Mazza » Mon Jul 08, 2019 7:27 am

To whom it may concern,

I would need to run a FAST simulation imposing a fixed value of turbulence intensity for different wind speeds (meaning that i don't want to follow the scaling rules prescribed by the IEC 61400 standards). Can anybody please tell me if it is possible and how to do it?
Thank you in advance.

with Kind Regards,
Piero.

Jason.Jonkman
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Location: Boulder, CO
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Re: FAST Simulation with fixed turbulence intensity

Postby Jason.Jonkman » Mon Jul 08, 2019 9:51 pm

Dear Piero,

Yes, this is certainly possible. Instead of following the turbulence scaling according to IEC 61400, you can specify the turbulence intensity directly in TurbSim via input parameter IECturbc.

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

Abhinay.Goga
Posts: 40
Joined: Tue Oct 25, 2016 8:12 am
Organization: SETEC elektronische Antriebsregelung GmbH
Location: Germany

Re: FAST Simulation with fixed turbulence intensity

Postby Abhinay.Goga » Fri Apr 30, 2021 12:20 am

Dear Jason,

Turbsim restricts the user specified IECturbc parameter to NTM. I would like to generate EWM wind files with class 1A according to GL. Means my turbulence intensity in percent has to be 18. Is there any way to do with Turbsim? If not are there any other software to generate such user defined wind files?

Thanks and regards

Jason.Jonkman
Posts: 5729
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: FAST Simulation with fixed turbulence intensity

Postby Jason.Jonkman » Fri Apr 30, 2021 6:18 am

Dear Abhinay,

You can select IEC_WindType = NTM in TurbSim and then specify your desired turbulence intensity in percent (IECturbc), power-law shear exponent (PLExp), etc.

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

Abhinay.Goga
Posts: 40
Joined: Tue Oct 25, 2016 8:12 am
Organization: SETEC elektronische Antriebsregelung GmbH
Location: Germany

Re: FAST Simulation with fixed turbulence intensity

Postby Abhinay.Goga » Fri Apr 30, 2021 7:07 am

Thanks for the prompt response, like always. I have implemented the same based on Gl 2010 guidelines but wasn't completely sure.

Kind regards


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