Based on the same chemical reaction model,an Navier-Stokes/Direct Simulation Monte Carlo(DSMC)hybrid algorithm with chemical non-equilibrium is proposed by using the Modular Particle-Continuum(MPC)technique using current Computational Fluid Dynamics(CFD)and DSMC methods.The DSMC region is selected automatically according to the CFD results in this hybrid scheme based on local Knudson numbers.A sub-relax technique for information exchange between CFD and DSMC is developed to restrain the effect of statistica...