In order to study the effects of two-stage pulse channel configurations on reattachment location and relative convective heat transfer coefficient in combustion chamber of dual pulse motor,the Reynolds-average Navier-Stokes equations were solved with three-order three-step Runge-Kutta iterative algorithm by cell center upwind finite volume method and AUSM-PW scheme were implemented for spatial discretization. Also,modified SST(shear-stress-transport) turbulence model that improved the capability of predicti...