NUMERICAL SIMULATION OF HIGH-SPEED SEPARATION FLOW IN THE AEROSPACE PROPULSION SYSTEMS

摘要

Results of numerical simulation of turbulentflow around a high-speed vehicle are presentedin the paper. Performance of several two- andthree-equation turbulence models based onRANS approach is studied. Special attention isgiven to the various versions of the threeequationlag turbulence model. The modelcontains a relaxation type equation for the nonequilibriumeddy viscosity. In the paper, theresults of numerical simulation of three highspeedturbulent flows are considered. The firstflow is a turbulent separated flow in supersonicrocket nozzle. The second one is a high-speedflow near compression ramp. In addition, ahypersonic flow near scramjet inlet iscalculated. It is shown that the lag turbulencemodel provides acceptable accuracy in mosthigh-speed flows considered.