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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 penetrationdoi:10.1088/1757-899x/408/1/012022 fatcat:ezhrkcbqbfhgzkjn24534c35di