Numerical simulation of hydrocarbon gas combustion and supersonic shear flow

A turbulent combustion of hydrocarbon fuel-rich gas with air two-dimensional supersonic shear flow was numerically simulated. NND difference scheme of convection item was used to capture shock wave with high precision, while turbulent viscid coefficient was calculated from B-L and Prandtl mixed length models. To simulate non-equilibrium combustion, Arrhenius reaction dynamic formula was used to confirm the chemical reaction rate. The simulated wall pressure results are in agreemant with the experimental data.The wave system suitable for flame stabilization was also analyzed.The combustion state was evaluated from the distribution of flow parameters and chemical components, providing a reference for improvement and optimization of combustion chamber.