Discussion of the results of a blade deformed

Wind & Water Structural Analysis
1

Hi Everybody,

I wrote some post earlier about the blade of a wind turbine. Now I would like to share some results I have achieved and I would like to know your opinion about them.

For a normal wind (e.g. 10 m/s) I calculated the pressure distribution on the blade. This pressure deforms the blade, and after analyzing the deformed blade I found that the twist angle decreases so the angle of attack increases.

Is this logical?

Thank you very much in advance

Eneko Agirre

2

Eneko,

It all depends on how the plies are laid up in the structural design. It is called flap-twist coupling. Some people have tried to use it to shed power during high-thrust conditions. It is sort of an enhanced, stall-regulated turbine.

Also, if the center of pressure does not go through the neutral axis or if you have a pitching moment, you can get twist.

Marshall

3

Thank you very much for your time and for responding so quickly

Eneko Agirre