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首页> 外文会议>AIAA/ASME/SAE/ASEE joint propulsion conference;AIAA propulsion and energy forum >Mixing Analysis of Like Doublet Injectors in High Pressure Environments for Gelled Propellant Simulants
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Mixing Analysis of Like Doublet Injectors in High Pressure Environments for Gelled Propellant Simulants

机译：胶状推进剂模拟物在高压环境下类似双峰注射器的混合分析

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摘要

Effect of ambient pressure on the mixing efficiency of impinging doublets is experimentally investigated for similar and dissimilar orifice diameter impinging jets with non-gelled and gelled propellant simulants. For similar orifice diameter impingement, the ambient pressure increase above atmospheric pressure enhances mixing for both gelled and non-gelled fluid. However, the mixing efficiencies stop increasing at and remain constant above a certain ambient pressure. Gelled simulant generally results in poorer mixing than the non-gelled simulant, suggesting the momentum carried by jets and pre-impingement jet conditions are the determining factor in mixing efficiency. For dissimilar orifice-diameter impingement cases, the mixing is generally constant over all ambient pressures. The equal jet velocity cases (momentum ratio = 0.5) produce better mixing than equal momentum ratio cases (momentum ratio = 1.0) or equal jet volumetric flow rate cases (momentum ratio = 2.0). The equal jet volumetric flow rate cases (momentum ratio = 2.0) results in worst mixing, regardless of ambient pressure and jet velocity for the range of pressures and velocities tested. For some optimized operating conditions, the dissimilar orifice-diameter impingement case can produce better mixing than the similar orifice diameter impingement case.
机译：对于非胶凝和胶凝推进剂模拟物，通过相似和不同的孔直径撞击射流，实验研究了环境压力对撞击双峰混合效率的影响。对于类似的孔口直径冲击，环境压力增加到大气压以上会增强胶凝流体和非胶凝流体的混合。然而，混合效率在一定环境压力下停止增加并保持恒定。胶凝模拟物通常导致混合效果比非胶凝模拟物差，这表明射流所携带的动量和预冲击射流条件是混合效率的决定因素。对于不同的孔直径冲击情况，混合在所有环境压力下通常是恒定的。相等的喷射速度情况（动量比率= 0.5）产生的混合效果比相等的动量比率情况（动量比率= 1.0）或相等的喷射体积流量的情况（动量比率= 2.0）更好。在相等的射流体积流量情况下（动量比= 2.0）会导致混合效果最差，无论环境压力和射流速度在测试的压力和速度范围内如何。对于某些优化的操作条件，相异的孔口直径撞击情况比相似的孔口直径撞击情况可以产生更好的混合。

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