Question

If a series of shock waves is used to decelerate supersonic flow to subsonic speed, then the variation of the shock wave will be

• A. decreasing half angle from the first to last
• B. constant half angle from the first to last
• C. increasing half angle from the first to last
• D. all shock waves are normal

Hint:

Lower Mach numbers require higher shock angles for the same turning angle.

Answer 1

The Correct Option is C

As the Mach number reduces with each shock, the subsequent oblique shock angles must increase to maintain the same turning angle.