Question

Why area of cross section of the wind turbine wing varies from hub to tip quora

Answer 1

Answer:

Explanation:The blades utilize airfoils to greatly enhance the power extracted from the wind, just like helicopter blades use airfoils to generate more lift than a simple screw propeller could. As a result they are able to spin much faster (in tip velocity) than an old-school flat-bladed windmill -- much faster than the wind blows through them. And by spinning faster, a lighter and thinner blade is able to interact with the same amount of air as a slow and fat blade. That saves materials and decreases cost.

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