A reasonable goal for blade design should be to A Have appro

A reasonable goal for blade design should be to: A. Have appropriate radial twist to insure a constant angle of attack for the mean wind speed of a site. B. Have appropriate radial twist to insure a constant angle of attack for the maximum wind speed of a site C. Have a twist angle which maximizes the relative wind speed for any angular position for the mean wind speed of a site. D. Have a twist angle which is optimized to push the blade to a near stall condition for all radius

Solution

Ans: A ( because all wind turbine blades based on mean wind speed only ).

&

C ( optimum twist angle makes turbine to generate maximum power and power of turbine is preportional to squre of relative speed.)