For higher supersonic speeds the pressure loss through the shock wave becomes prohibitive and a protruding spike or cone is used to produce oblique shock waves in front of a final normal shock that occurs at the inlet entrance lip. The diffuser in this case consists of two parts, the supersonic diffuser, with shock waves external to the inlet, followed by the internal subsonic diffuser.
For higher supersonic speeds the pressure loss through the shock wave becomes prohibitive and a protruding spike or cone is used to produce oblique shock waves in front of a final normal shock .that occurs at the inlet entrance lip The diffuser in this case consists of two parts, the supersonic diffuser, with sho.ck waves external to the inlet, followed by the internal subsonic diffuser