Experimental and Numerical Studies of Diamond-Shaped Injector in a Supersonic Flow
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A study was conducted to investigate flush-wall injection through a diamond-shaped orifice. A diamond-shaped port was found to produce the desired flow structure. Boundary-layer and injector fluid were entrained into this recirculation zone, termed the lateral counter-rotating vortex pair (LCVP), as the structure contained a vortex pair spanning the width of the barrel shock. Parametric studies were performed for freestream Mach numbers from 2 to 5 to determine the robustness of the LCVP. It was found that by controlling the injector pressure, which demonstrated of the LCVP to be created. The residence time within the LCVP was estimated to be an order of magnitude longer than the flow time through the solution domain, indicating that LCVP to be sufficient for flame holding under some circumstances. The also focused on examining the structure of the LCVP and assess reactivity within it.