Question

Why blade velocity of wind turbine varies?

(a) Due to varying wind speeds

(b) Long length of blades

(c) Due to the height of mount

(d) Because of hotness of Sun

I have been asked this question in an internship interview.

I'd like to ask this question from Velocity and Power from Wind topic in chapter Wind Energy of Energy Engineering

Answer 1

Correct answer is (b) Long length of blades

For explanation I would say: Wind turbine experiences change in velocity dependent upon the blade inlet angle and the blade velocity. Since the blades are long, the blade velocity varies with the radius to a greater degree than steam or gas-turbine blades and the blades are therefore twisted.