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通过对高温超声速流中爆震波性质的研究,评估其在高超声速冲压发动机燃烧室的燃烧组织中应用的可行性,并通过数值模拟对分析结论进行了验证。提出了一种新的爆震波起爆机制,注入高温超声速流中的燃料混气可通过自身缓慢的释热使流动进入局域热壅塞状态,进而借助局域热壅塞产生的激波实现爆震波的起爆。计算结果表明在适宜的温度与马赫数条件下,注入高温超声速流中的燃料可通过新的起爆机制在超声速流中形成一道稳定的驻定爆震波。表明在高超声速冲压发动机燃烧室中存在着通过驻定爆震波实现火焰稳定的可能性。
Through the study of the properties of detonation wave in high temperature supersonic flow, the feasibility of the detonation wave in the combustion chamber of hypersonic ramjet engine was evaluated. The results of the analysis were verified by numerical simulation. A new detonation wave detonation mechanism is proposed. The fuel mixture injected into the high-temperature supersonic flow can flow into the local thermal congestion state through its slow heat release, and then realize the detonation wave with the shock wave generated by the local thermal congestion Detonated. The calculation results show that under the proper temperature and Mach number, the fuel injected into the supersonic supersonic flow can form a stable settled explosive wave in the supersonic flow through a new detonation mechanism. It shows that there is a possibility of stabilization of the flame in the supersonic ramjet engine combustion chamber by the presence of a stationary detonation wave.