Distance to First Airfoil

Discuss acquisition, use, and manipulation of airfoil data.

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James.Duncan
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Distance to First Airfoil

Postby James.Duncan » Mon Jan 04, 2016 8:24 am

I was wondering whether anyone had any information regarding the radial distance to the first airfoil for a SWT-2.3-101 Wind Turbine. I am trying to garner span-wise variation in power extraction, as such knowing the location of the first airfoil is important to modeling root losses. I have read through both:

Aerodynamic and Performance Measurements of a SWT-2.3-101 Wind Turbine (http://www.nrel.gov/docs/fy12osti/51649.pdf)
Inflow Characterization and Aerodynamic Measurements on a SWT-2.3-101 Wind Turbine (http://www.nrel.gov/docs/fy12osti/53666.pdf)

both have been unable to find the information that is needed.

If this information is proprietary or unknown, does anyone with more experience have any idea about what is a general location of where the first airfoil starts as either a percentage of the blade length or just actual distance. Any help would be greatly appreciated.

Jason.Jonkman
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Re: Distance to First Airfoil

Postby Jason.Jonkman » Mon Jan 04, 2016 12:55 pm

Dear James,

The geometry of the SWT-2.3-101 is certainly proprietary. I would venture to say that, in general, the location of the first pure airfoil would occur between 10-20% span. Of course, there is typically a transition region more inboard between the cylindrical root and the first pure airfoil.

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

James.Duncan
Posts: 3
Joined: Thu Dec 17, 2015 1:55 pm
Organization: TTU
Location: Texas

Re: Distance to First Airfoil

Postby James.Duncan » Mon Jan 04, 2016 2:23 pm

I appreciate your quick response, I figured it was proprietary but wasn't entirely sure given the other reports NREL has released with respect to the SWT-2.3 aerodynamic testings.


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