Numerical study on hypersonic double cone separated flow

A portion entropy fix method was developed in a computational fluid dynamic(CFD) code based on Navier-Stokes techniques with Roe's scheme. The portion entropy fix method overcomes the shortage of large dissipation in boundary layer simulations that traditional entropy fix method generally may possess and achieves more accurate simulation results of complex hypersonic viscous flows with shock wave/boundary layer interaction. In this paper, the typical hypersonic double cone separated flows with shock wave interactions are computed by the code. The grid sensitivity and the entropy fix method dissipation effects are studied. From the analysis, the simulation results of hypersonic separated flows with shock wave interactions are very sensitive with grid refinement, and coarse grid will give large departure; portion entropy fix methods with low dissipation obtaines more credible solution for complex hypersonic separated flows with strong shock wave interactions.