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The laminar boundary layer for a thin airfoil is maximum at_____(a) Leading edge(b) Trailing edge(c) Quarter-chord(d) We can’t say without calculatingI had been asked this question by my school principal while I was bunking the class.This interesting question is from Laminar Flow in section Incompressible Flow over Airfoils of Aerodynamics

Answer»

The correct choice is (b) Trailing edge

The explanation: The BOUNDARY layer thickness increases parabolically with the DISTANCE MEASURED from the leading edge (denoted by X) for incompressible, laminar flow. Therefore, it is LARGEST at the trailing edge.



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