[Good Guy]

Hello, Good day.

I'm simulating a wind turbine, I designed on my own, using ANSYS FLUENT. At tip speed ratio equal to 5 and lower, I'm getting positive torque. However, at tip speed ratio equal to 6 and above, I'm getting negative torque. Since I have frame motion enabled, the wind turbine is "still spinning in the correct direction" from looking at the vortex visualization by q-criterion, but if this was in the real world, I think, negative torque would mean that the wind turbine is spinning in the opposite direction. I made an airfoil pressure cut plot and from the looks of it, it seems normal.

Is my simulation incorrect or does this simply just mean that the design is bad? If the latter, what would be a good explanation of this?

I apologize for posting twice. I thought the previous one was not posted.