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Prandtl – Glauert compressibility correction is applied for finding airfoil properties at low speed.

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Prandtl – Glauert compressibility correction is applied for finding airfoil properties at low speed.

(a) True

(b) False

The question was asked during a job interview.

Origin of the question is Prandtl-Glauert Compressibility topic in division Subsonic Compressible Flow over Airfoils : Linear Theory, Linearized Supersonic Flow of Aerodynamics

1 Answer

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Correct answer is (b) False

The explanation: After the World War 2 period when high speed aircrafts came into being, the aerodynamic theory over thin airfoils for incompressible flow was not applicable. The assumption of incompressible flow could not be used and hence Prandtl – Glauert compressibility correction came into being. This correction makes use of the data for incompressible flow applicable for high speed aircraft in a compressible flow.

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