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For the case of infinite horseshoe vortices along the lifting line, a vortex sheet exists which_________(a) Is formed by continuous trailing vortices(b) Is perpendicular to free-stream velocity(c) Total strength is zero(d) Equal and opposite trailing vorticesI had been asked this question during an interview.This key question is from Prandtl’s Classical Lifting-Line Theory topic in section Flow over Airfoils over Finite Wing of Aerodynamics |
Answer» Correct answer is (b) Is perpendicular to free-stream velocity |
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