The critical Mach number of an airfoil is attained when Options: A . &nbspthe freestream Mach number is sonic. B . &nbspthe freestream Mach number is supersonic. C . &nbspthe Mach number somewhere on the airfoil is unity. D . &nbspthe Mach number everywhere on the airfoil is supersonic.

The critical Mach number of an airfoil is attained when

Question

The critical Mach number of an airfoil is attained when

Options:

A . the freestream Mach number is sonic.

B . the freestream Mach number is supersonic.

C . the Mach number somewhere on the airfoil is unity.

D . the Mach number everywhere on the airfoil is supersonic.

Answer: Option C

-NA-

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