An efficient CFD approach for simulating unsteady hypersonic shock-shock interference flows

An efficient CFD approach based on higher order accurate numerical schemes has been developed for simulating unsteady hypersonic viscous flows strongly associated with shock-shock interference flow phenomena. The principal concept of the present approach is to employ the higher-resolution 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 scheme modified using the Newton iteration in time integration. The hypersonic shock-shock interference flow which is well known as the Type TV is numerically investigated. The obtained numerical results are showing extremely complicated flow structures, such as an unsteady supersonic jet, a jet-bow-shock, and unsteady supersonic shear layers. The reliability of the calculated results is checked by comparison with the existing experimental and numerical results. (C) 1998 Elsevier Science Ltd. All rights reserved.