Regular-to-Mach reflection transition on curved surfaces

Abstract eng:
It is shown, using the curved shock theory, that the flow near the leading edge of a doubly curved wedge can choke to force the shock to detach from the wedge. It is then observed that the fluid-mechanical process involved in the detachment of an oblique shock from a plane or curved surface and the termination of regular reflection on a plane or curved surface have the same underlying causes. This leads to a new criterion for regular-to-Mach reflection transition based on this ‘local choking.’ Numerical experiments are carried out to explore the possibility that transition to Mach reflection can be induced by streamwise and transverse wall curvature.

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