Experiments on Normal Shock-Induced Vortex Breakdown from Mach 1.3 to Mach 1.5

Interactions between vortices and normal shock waves, which are often encountered in transonic and supersonic flows, can cause the vortices to break down or burst. Experiments aimed at establishing the characteristics of these interactions are performed in the range Mach 1.3 to Mach 1.5, where little experimental data is available despite the industrial relevance of this regime. A strong compressibility effect was observed, with the non-dimensional circulation required to cause vortex breakdown reducing by about 25