Direct numerical simulation of hypersonic boundary layer transition over a lifting-body model HyTRV

Abstract Direct numerical simulation (DNS) of transition over a hypersonic lifting body model HyTRV developed by China Aerodynamics Research and Development Center is performed. The free-stream parameters are: the Mach number 6, unit Reynolds 10000/mm, temperature 79 K, angle attack 0, wall 300 K. Weak random blowing-and-suction perturbations in leading range are used to trigger transition. A high order finite-difference code OpenCFD authors for simulation, grid convergence test shows that locations grid-convergence. DNS results show occurs central area lower surface concaved region upper surface, regions also streamline regions. mechanisms different investigated using spectrum POD analysis.