Aerospace Engineering > GATE 2018 > Airfoils and Wings
A thin airfoil is mounted in a low-speed, subsonic wind tunnel, in which the Mach number is 0.1. At a point on the airfoil, the pressure coefficient is measured to be -1.2. If the flow velocity is increased such that the free-stream Mach number is 0.6, the pressure coefficient at the same point on the airfoil will approximately be:
A
-3.5
B
-2.9
C
-1.5
D
-0.75

Correct : c

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