Critical transonic shock and supersonic bubble in oblique rarefaction wave reflection along a compressive corner

摘要

The oblique rarefaction wave reflection along a compressive corner is considered by using the numerical generalized characteristic analysis method (NGCAM). We have clarified that there are two patterns: regular reflection-like and Mach reflection-like. In both patterns, the reflection wave is always a compression simple wave, which ultimately forms a critical transonic shock. The critical transonic shock is a special kind of transonic shock, and the flow at the back bank of the shock is just sonic. A supersonic bubble near the compression corner grows in the second pattern and will break through as the rarefaction wave size increases.