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Is outer flow over an airfoil has less camber than the original airfoil?

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Is outer flow over an airfoil has less camber than the original airfoil?

(a) False

(b) True

The question was asked in an international level competition.

This question is from Viscous Flow in division Incompressible Flow over Airfoils of Aerodynamics

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Best answer
Correct option is (b) True

Explanation: The outer flow sees an equivalent airfoil that has less camber than the original airfoil, due to the disproportionate growth of the boundary layer on the two side and that has an open trailing edge. Such an airfoil produce less lift than the original airfoil.

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