For supersonic mixing enhancement, large scale streamwise vortices seem to be the most advantageous. In SCRAM jet (supersonic combustion ramjet) engine, the device which introduces both the large scale streamwise vortices and fuel into supersonic flow needs to be installed on the chamber wall to alleviate the heavy aerodynamic and heat load, so that, it must have the high ability to mix the fluids in near-wall and freestream, efficiently. In the present study, we made effort to clarify the mixing performance of such wall-mounted ramp injectors. And , we clarified that Hyper-mixer type wall-mounted ramp injector is effective to expand the mixing field in high Mach number flow.
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