What form of force acts on the blades of Darrieus machine?(a) Pure tension(b) Compression(c) Shear force(d) Air resistance forceI had been asked this question by my college professor while I was bunking the class.The question is from Vertical Axis Wind Mill topic in division Wind Energy of Energy Engineering

What form of force acts on the blades of Darrieus machine?(a) Pure ten

1.	What form of force acts on the blades of Darrieus machine?(a) Pure tension(b) Compression(c) Shear force(d) Air resistance forceI had been asked this question by my college professor while I was bunking the class.The question is from Vertical Axis Wind Mill topic in division Wind Energy of Energy Engineering
Answer» Correct option is (a) PURE tension Easy explanation: Darrieus wind mill has two or three thin, curved blades with airfoil cross SECTION and constant chord length. Both ends of blades are attached to a VERTICAL shaft. Thus the force in the blade due to ROTATION is pure tension.

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