Distributed blade properties for small turbines

Wind & Water Airfoils
1

Hello everyone,

I have been working on my final university repport about using wind turbines for residential use and to start understanding the program operation I am trying to simulate any turbine that has less than 3 meters in diameter, but I’m failing on that.

At this link: [url]https://wind.nrel.gov/airfoils/AirfoilFamilies.html[/url], I discovered that the best existing airfoils in database for my application are the s835, s833 and s834. But my question is: Where can I find the discretized properties of these blades?

Some elements concerning the geometry of the airfoils I can deduce by interpolation, but the flap and edge stiffness, for example, I do not know how to obtain.

I would be very much obliged if you can help me.

Best regards,

Vinicius M. Bacelar
Polytechnic School of São Paulo University

2

Dear Vinicius,

I am not aware of a wind turbine model in FAST / OpenFAST in the public domain that has 3-m rotor diameter. The SWRT model from the FAST CertTest or OpenFAST r-test is the closest, with a diameter of 5.8 m. If you can’t find a model with a rotor diameter of 3 m, you could estimate the stiffness of a blade on a 3-m diameter rotor by applying geometric scaling laws to the stiffness of the blade from the SWRT model.

Best regards,

3

Dear Jason,

I aprecciate for your help. This SRTW file is being very useful.

Yet I must comment that I’m a little disappointed with the difficulty on modelling new turbines for inputs in FAST. It seems to be limited for the study of small turbines, at least the public data.

Best regards,

Vinicius M. Bacelar
Polytechnic School of São Paulo University