Aerodynamic Torque

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Gianluca.Ippoliti
Posts: 6
Joined: Tue Feb 05, 2013 10:57 am
Organization: Università Politecnica delle Marche
Location: Italy

Re: Aerodynamic Torque

Postby Gianluca.Ippoliti » Wed Mar 03, 2021 12:31 pm

Dear Jason,

for the NREL 5-MW turbine, I would like to estimate the aerodynamic torque from a measure of the wind. Has FAST a LIDAR module ?

Thank you.

Best regards

Gianluca

Jason.Jonkman
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Re: Aerodynamic Torque

Postby Jason.Jonkman » Wed Mar 03, 2021 1:58 pm

Dear Gianluca,

There is somewhat of an "unofficial" LiDAR module that is part of the Simulink interface, somewhat documented in the following forum topic: viewtopic.php?f=14&t=1211&p=7874.

I know there has been work to incorporate a more extensive and "official" LiDAR module into OpenFAST, based on work developed at the University of Stuttgart, but this effort has not yet been completed.

Of course, you can also output the ambient wind from any location you want via standard outputs from the InflowWind module.

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

Gianluca.Ippoliti
Posts: 6
Joined: Tue Feb 05, 2013 10:57 am
Organization: Università Politecnica delle Marche
Location: Italy

Re: Aerodynamic Torque

Postby Gianluca.Ippoliti » Sat Mar 06, 2021 1:37 am

Dear Jason,

I have tried to follow the indications of the document that you gave me. The simulation starts but Simulink doesn’t go over the initialization phase. In other word, Simulink run for a long time the initialization phase but doesn’t go ahead in the simulation. I’m using FAST_v8.16 and Matlab R2015a.

I have set the paramer UseLidar=1, LidRadialV=0, Lidar x measurement coordinate =-100, Lidar y measurement coordinate = 0, Lidar z measurement coordinate = 0.

If I run the program with UseLidar=0 (no lidar), it works correctly.

Is it correct what I have done? May be my FAST have some file corrupted? Is it possible to download from NREL website FAST v8 in order to try with original files?

I would like to measure the wind with the lidar in order to get a low pass filtered measurement of the wind to obtain a smooth aerodynamic torque to be used as a feedback for a data driven control strategy.

Best regards

Gianluca

Jason.Jonkman
Posts: 5726
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO
Contact:

Re: Aerodynamic Torque

Postby Jason.Jonkman » Mon Mar 08, 2021 9:05 am

Dear Gianluca,

I don't see any problems with what you stated. Did you follow all of the steps outlined in the forum post linked above? I'm not sure I can be of much help here because I've not used this "unofficial" feature myself before.

The old archive of FAST v8.16 is available on my Google drive: https://drive.google.com/drive/folders/ ... sp=sharing.

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

Gianluca.Ippoliti
Posts: 6
Joined: Tue Feb 05, 2013 10:57 am
Organization: Università Politecnica delle Marche
Location: Italy

Re: Aerodynamic Torque

Postby Gianluca.Ippoliti » Mon Mar 08, 2021 11:53 am

Dear Jason,

many thanks. The problem still persists also with the new files. I will read again the link you gave me to try to find a solution
Thank you again

Best regards

Gianluca

Gianluca.Ippoliti
Posts: 6
Joined: Tue Feb 05, 2013 10:57 am
Organization: Università Politecnica delle Marche
Location: Italy

Re: Aerodynamic Torque

Postby Gianluca.Ippoliti » Tue Mar 09, 2021 5:01 am

Dear Jason,

now it seems to work.

Thank you.

Gianluca


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