Numerical simulation of steady shock and detonation wave configurations in a supersonic chemically reacting flow

摘要

Numerical investigations of regular and Mach reflections in supersonic chemically reacting flows have been performed by a high-order MUSCL TVD scheme. It has been found that, as for nonreacting SW, there is a dual solution domain, where the existence of both RR and MR is possible under identical boundary conditions. In the case of MR, MS is a section of the front of an overdriven DW. The simulations have shown that various local perturbations of the free-stream flow might initiate the transition from RR to MR. Our study has revealed that h/w is one of the governing parameters . Depending of its value, for M_(in) = 5.5, MS inevitably moves upstream up to the inflow boundary or vanishes. For higher Mach numbers, M_(in) = 8.0, M_(in) = 7.0, and M_(in) = 6.0, MR configurations with a standing MS have been obtained. In the case of M_(in) = 6.0, MS has a system of weak unsteady transverse waves on its front. The dependences of the MS height on the wedge angle θ and on the amount of heat released have been found. It has been demonstrated that the existence of strong transverse waves on the MS front is the reason for unsteadiness of Mach reflection in reacting flows.