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How rotating flow is induced?

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in Aerodynamics by (773k points)
How rotating flow is induced?

(a) Joint effect of airfoil

(b) Joint effect of chord

(c) Joint effect of camber

(d) Joint effect of camber line

The question was posed to me by my school teacher while I was bunking the class.

The doubt is from The Kutta-Joukowski Theorem in portion Inviscid & Incompressible Flow of Aerodynamics

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Right answer is (c) Joint effect of camber

The best I can explain: Rotating flow is induced by the joint effect of camber, angle of attack and sharp trailing edge of the airfoil and should not be confused with a vortex like a tornado encircling the cylinder or wing of an airplane in flight.

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