Numerical Investigation of the Stability of Rotating Detonation Engines
Numerical Investigation of the Stability of Rotating Detonation Engines
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DOI：
10.1080/00102202.2014.935641
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发表时间：
2014-09
影响因子：
1.9
通讯作者：
Dan Wu;R. Zhou;Meng Liu-;Jian-ping Wang
中科院分区：
文献类型：
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作者：
Dan Wu;R. Zhou;Meng Liu-;Jian-ping Wang
随着喷射总压的增加，旋转爆震发动机燃烧室内的流场变得复杂，爆震波变得不稳定。当总压足够高时，爆轰波呈周期性振荡，强弱交替。在相同的喷射条件下，两波RDE没有出现振荡现象，两波爆震波在燃烧室内稳定传播。喷射拉瓦尔喷嘴沿着头端的阻塞比不受总压力、传播模式或爆震波数目的影响。因此，RDE的质量流量可以通过喷射拉瓦尔喷嘴的最大质量流量来估计。随着总压的增加，RDE的比冲和推力总体上呈增长趋势。然而，在高总压下，它们在单波RDE中与不稳定爆轰波一起振荡。
As the injection total pressure increases, the flow field in the combustion chamber of rotating detonation engine (RDE) becomes complicated and the detonation wave becomes unstable. When the total pressure is high enough, the detonation oscillates periodically and alternates between strong and weak. Under the same injection conditions, no oscillation is observed in two-wave RDE, and the two detonation waves propagate stably in the combustion chamber. The choking ratio of the injection Laval nozzle along the head end is not influenced by the total pressure, the mode of propagation, or the number of detonation waves. And thus the mass flux of RDE can be estimated using the maximum mass flux of the injection Laval nozzle. The specific impulse and thrust of RDE show overall growth as total pressure increases. However, they oscillate with the unstable detonation wave in one-wave RDE at high total pressure.