AN EFFICIENT CFD APPROACH FOR SIMULATING UNSTEADY HYPERSONIC SHOCK-SHOCK INTERFERENCE FLOWS

An efficient CFD approach based on higher order accurate numerical sch emes has been developed for simulating unsteady hypersonic viscous flo ws strongly associated with shock-shock interference flow phenomena. T he principal concept of the present approach is to employ the higher-r esolution finite difference schemes based on the fourth-order accurate compact MUSCL TVD scheme coupled with the AUSM-based scheme in space discretization and based on the maximum second-order accurate LU-SGS s cheme modified using the Newton iteration in time integration. The hyp ersonic shock-shock interference flow which is well known as the Type TV is numerically investigated. The obtained numerical results are sho wing extremely complicated flow structures, such as an unsteady supers onic jet, a jet-bow-shock, and unsteady supersonic shear layers. The r eliability of the calculated results is checked by comparison with the existing experimental and numerical results. (C) 1998 Elsevier Scienc e Ltd. All rights reserved.