The feasibility of mode control in rotating detonation engine

The feasibility of mode control in rotating detonation engine
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旋转爆震发动机模态控制的可行性

DOI:
10.1016/j.applthermaleng.2017.10.146
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发表时间:
2018-01
影响因子:
6.4
通讯作者:
Zhou Changsheng
Zhou Changsheng
中科院分区:
工程技术2区
文献类型:
--
作者:
Deng Li;Ma Hu;Xu Can;Liu Xiao;Zhou Changsheng

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在不同的空气流量、燃烧室长度和出口堵塞率条件下,通过调节试验过程中的总当量比,研究了旋转爆震发动机模式控制的可行性,包括单波与两个同向旋转波、两个反向旋转波与纵向脉冲爆震、两个同向旋转波与纵向脉冲爆震的模式转换。对单波模式下旋转爆轰波在燃料浓度梯度混合物中的传播进行了实验研究。结果表明,旋转爆轰波具有自适应当量比变化的能力。当量比的减小导致混合物反应性变差,从而降低了单波模式下的波速,导致两个同向旋转波向单波转变。随着燃烧室长度的增加,纵向脉冲爆轰波出现的临界当量比减小。增加燃烧室长度导致在较低当量比下从两个反向旋转波向纵向脉冲爆轰的转变。本文论证了模态控制在旋转爆震发动机中的可行性,促进了旋转爆震发动机的应用。
The feasibility of mode control in rotating detonation engine is investigated through regulating the global equivalence ratio during the test under different air mass flow rates, chamber lengths, and blockage ratios at the exit, including the mode transitions between the single wave and two co-rotating waves, two counter-rotating waves and longitudinal pulsed detonation, two co-rotating waves and longitudinal pulsed detonation. The rotating detonation wave propagating in the mixture with fuel concentration gradients under single wave mode is also tested. The results show that, the rotating detonation wave has the ability to adapt itself to the changing of equivalence ratio. The decreasing of the equivalence ratio leads to the poor reactivity of mixtures, which decreases the wave speed under the single wave mode, and results in the transition from two co-rotating waves to single wave. The increasing of the chamber length decreases the critical equivalence ratio for the emergence of longitudinal pulsed detonation. Increasing the chamber length leads to the transition from two counter-rotating waves to longitudinal pulsed detonation at relatively low equivalence ratio. This paper demonstrates the feasibility of mode control in rotating detonation engine, and promotes the application of rotating detonation engine.
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