numerical study of shock-wave reflections from a wedge with surface roughness

摘要

numerical simulations of shock-wave reflections from a wedge with surface roughness are performed using a two-dimensional finite-volume generalized- Riemann-problem (GRP) scheme. The surface roughness is simulated by two- Dimensional square cavities (gutters), which are formed on a wedge surface With regular intervals. The numerical results are compared with shadowgraphs Obtained from shock-tube experiments, with excellent agreement. The forma- Tion and propagation of a secondary reflected shock wave, which plays a key Role in the shock-wave reflection from a multi-guttered wedge, are revealed And discussed in the present numerical study.