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采用数值模拟的方法研究了超音速来流撞击圆锥体诱导的驻定爆轰波的结构和性能,讨论了不同初始来流温度下,爆轰波结构和波后压力的变化。结果表明,随着来流初始温度的降低,爆轰波的增压比逐渐增加,有利于提高驻定爆轰发动机的推进性能。当初始温度较高时,爆轰波阵面呈现光滑平直的形态,而初始温度较低时,爆轰波呈现出明显的三波点结构,且温度越低,三波点数量越多排列越紧密,这些具有较高压力的三波点对爆轰波波后压力的变化起到了重要作用。
The structure and performance of the detonation wave induced by the supersonic stream impinging cone were investigated by numerical simulation. The changes of detonation wave structure and wave pressure were discussed under different initial inflow temperatures. The results show that with the decrease of the initial temperature of the incoming flow, the pressurization ratio of the detonation wave gradually increases, which is propitious to improve the propulsion performance of the detonation engine. When the initial temperature is high, the detonation wave front presents a smooth and straight shape. When the initial temperature is low, the detonation wave shows a clear three-wave point structure, and the lower the temperature, the more the three wave points are arranged more closely These three wave points with higher pressure play an important role in the change of post-wave pressure.