Coordinate System in FAST

Provide feedback, request enhancements, and get help with wind-turbine computer-aided engineering tools.

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Joined: Thu May 01, 2014 3:16 am
Organization: Kyushu University
Location: Japan

Re: Coordinate System in FAST

Postby Yingyi.Liu » Mon Nov 19, 2018 11:37 am

Jason.Jonkman wrote:Dear Yingyi.Lin,

I agree with points (1) and (2), but point (3) and your picture are not correct. Regarding (3), the thrust for an upwind wind turbine should be directed along positive x. Regarding your picture, it would be correct if you rotate each blade 180 degrees around its z axis, such that x points downwind and the rotor spins clockswise (when looking downwind) opposite to the direction of y.

Best regards,

Dear Jason,

Thanks. So does it mean that a wind turbine always spins clockwise (looking downwind), no matter it is an upwind or a downwind turbine? Is this understanding correct?

Best regards,
Yingyi Liu

Posts: 4623
Joined: Thu Nov 03, 2005 4:38 pm
Location: Boulder, CO

Re: Coordinate System in FAST

Postby Jason.Jonkman » Mon Nov 19, 2018 1:21 pm

Dear Yingyi.Lin,

Yes, in FAST, both upwind and downwind wind turbines spin clockwise when looking downwind.

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

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