Experimental investigation on the operating characteristics in a multi-tube two-phase valveless air-breathing pulse detonation engine

Experimental investigation on the operating characteristics in a multi-tube two-phase valveless air-breathing pulse detonation engine
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多管两相无阀吸气式脉冲爆震发动机工作特性试验研究

DOI:
10.1016/j.applthermaleng.2014.07.018
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发表时间:
2014-12
影响因子:
6.4
通讯作者:
Longxi Zheng
Longxi Zheng
中科院分区:
工程技术2区
文献类型:
--
作者:
Jie Lu;Jingjing Huang;Changxin Peng;Longxi Zheng

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为了研究多管吸气式脉冲爆震发动机的工作特性,设计了一台四管汽油/空气两相流无阀吸气式脉冲爆震发动机。PDE以每管30 Hz的最大频率操作,总最大频率为120 Hz。成功地进行了四种不同的点火模式:单管点火、双管同时点火、三管同时点火和四管同时点火。对多管点火方式下爆轰波和后向传播压力波的同步性进行了定量分析和比较。讨论了充气室内反向传播压力波的平均峰值压力。实验结果表明,四管脉冲爆震发动机可以在四种点火模式下成功工作,并可以从一种点火模式转换到另一种点火模式。爆震波到达时间的差异在所有多管点火模式中均表现出来,导致后向传播压力波到达时间差异较大。在多管点火方式下,气室中反向传播压力波的平均峰值压力具有相同的变化趋势。单管点火模式导致空气增压室中的压力峰值最小,并且压力峰值在增加点火管处增加。
A four-tube two-phase gasoline/air valveless air-breathing pulse detonation engine (PDE) was designed and tested to investigate the operating characteristics of multi-tube air-breathing PDE. The PDE was operated at a maximum frequency of 30 Hz per tube with a total maximum frequency of 120 Hz. Four different firing patterns were successfully carried out: single tube firing, dual tubes firing simultaneously, three tubes firing simultaneously, and four tubes firing simultaneously. The synchronicity of the detonation waves and back-propagation pressure waves under multi-tube firing patterns were quantified and compared. The averaged peak pressure of back-propagation pressure waves in the air plenum chamber was discussed. The experimental results indicated that the four-tube PDE could be operated successfully under the four firing patterns and transformed from one firing pattern to another. The time of arrival differences of detonation waves showed up in all multi-tubes firing patterns, which led to greater arrival differences of back-propagation pressure waves. The averaged peak pressure of back-propagation pressure waves in the air plenum chamber had the same change trend under multi-tube firing patterns. Single tube firing pattern resulted in the smallest pressure peak in the air plenum chamber and the pressure peak increased at the increased fired tubes.
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