Numerical Study on Configuration of Scramjet Combustor

The numerical simulation has been carried out to further investigate the cold flow characteristics for mixing efficiency and flame stability of the composite structure of pylon and cavity in the supersonic combustor and optimize the supersonic combustor flow field. It is found that the pylon can greatly improve the penetration depth of the jet and enhance the blending, and it will not bring the greater total pressure loss. Cavity can promote the diffusion of ethylene and improve the penetration depth of fuel, but also cause greater total pressure loss. The combination of the pylon and cavity can make good use of the advantage of the each single device and the geometry dimension and the combination mode of the pylon and cavity can be further analyzed from to improve the performance of the scramjet engine in next step.