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The pressure drag in a fully attached flow over an airfoil is zero.

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in Aerodynamics by (773k points)
The pressure drag in a fully attached flow over an airfoil is zero.

(a) True

(b) False

I got this question by my school principal while I was bunking the class.

My query is from Viscous Flow in division Incompressible Flow over Airfoils of Aerodynamics

1 Answer

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by (720k points)
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Best answer
The correct choice is (a) True

Easiest explanation: For the attached flow, the pressure acting at the rear end of the airfoil counteracts the pressure acting on the front edge. But once flow separation occurs, the rear pressure reduces causing a net backward pressure – pressure drag.

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