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为了进一步提升水冲压发动机比冲性能,基于涡耗散燃烧模型,建立了高金属含量镁基推进剂水冲压发动机3D多相流掺混燃烧反应模型,获得了不同进水比例对补燃室内温度分布、组分变化以及发动机比冲等参数的影响规律,计算结果与地面试验基本吻合。研究结果表明,一次水燃比对高金属含量水冲压发动机的性能影响明显,随着一次水燃比的不断增大,发动机比冲呈现出先增后减的情况,存在某个最佳的一次水燃比,发动机比冲性能最高。
In order to further improve the specific impulse performance of water-ramjet engine, a 3D multiphase mixed-combustion reaction model of water-ramjet engine with high content of magnesium based propellant was established based on the eddy-dissipation combustion model. Distribution, composition variation and engine specific impulse and other parameters of the law, the calculated results are basically consistent with the ground test. The results show that the first water to fuel ratio has a significant effect on the performance of high metal content water ramjet engine. With the first water to fuel ratio increasing, the specific impulse of the engine shows the first increase and then decrease, Engine than the highest performance.