FAST.Farm

Dear Jason,

I have two turbines with a distance between them of 8 times the rotor diameter (8D). The first turbine is yawed at 15 degrees. When I compute the power with different wind speeds (6m/s, 8m/s and 10m/s), there is weird turbulence happening at the second turbine at wind speed 8m/s and above, due to the wake effect of the first turbine, that does not stabilize. This turbulence is not happening for 6m/s for example (it stabilizes after a certain amount of time). I don’t know if it is normal to have something like that. Here are my simulations of 6m/s and 8m/s vizualized:

U=6m/s
Yaw15degreesU6.gif

U=8m/s
Yaw15degreesU8.gif

Do you have any suggestions to avoid such turbulence when the wind speed is higher than 8m/s (to stabilize them?)? Or is it normal to have them?

Kindest regards

Younes