On the unsteady shock wave interaction with a backward-facing step: Inviscid analysis
A planar shock wave interacting with a backward-facing step was investigated theoretically and computationally over a parameter space defined by the incident shock strength (MS) and the area ratio between the two channel heights (A2/A1). The 2D rectangular geometry is representative of that found in scramjet inlets. Theoretical analyses provided a mapping of the six possible flow configurations to the parameter space, primary wave strengths, and regional flow properties. 16 time-accurate inviscid simulations were performed, which provided full-field pressure maps, wave strengths, and quantitative measurements of key parameters. Qualitative results include illuminating discussions on shock structure, expansions, shock-shock interactions, and shock-expansion interactions. Quantitative results include comparisons of primary wave strengths, measurements of the critical shock location, and the decay profile of the transmitted shock. The studies showed that these flow fields are inherently transient and multidimensional. 2012 by Nicole Renee Mendoza.