Air flows at supersonic speed toward a compression ramp, as in Fig P9 129 A scratch on the wall at a creates a wave of 30 deg angle, while the oblique shock has a 50 deg angle What is (a) The ramp angle theta and (b) The wave angle phi caused by a scratch at b Fig P9 129 300 Ma 50...

The two scratches cause Mach waves w ...

Air flows at supersonic speed toward a compression ramp, as in Fig. P9.129. A scratch on the

Question:

Air flows at supersonic speed toward a compression ramp, as in Fig. P9.129. A scratch on the wall at a creates a wave of 30° angle, while the oblique shock has a 50° angle. What is
(a) The ramp angle θ; and
(b) The wave angle φ caused by a scratch at b? Fig P9.129