Effect of high-pressure detonation products on fuel injection and propagation characteristics of detonation wave

IF 5.4 2区工程技术 Q1 ENGINEERING, AEROSPACE Propulsion and Power Research Pub Date : 2022-03-01 DOI:10.1016/j.jppr.2021.12.003

Gaoyang Ge , Li Deng , Hu Ma , Zhenjuan Xia , Xiao Liu , Changsheng Zhou

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引用次数: 1

Abstract

The effect of high-pressure detonation products on fuel injection and propagation characteristics of detonation wave has been investigated in the form of ion voltage by varying the equivalence ratio (ER), air mass flux, and operation duration with hydrogen-air mixtures. It has been shown experimentally that the ion voltage decays gradually during the initial stage of rotating detonation wave (RDW). The attenuation of ion voltage is a general phenomenon, and the decay rate of ion voltage and its peak value of the trough state are related to the equivalence ratio and air mass flux. The analysis of interaction between the combustor and hydrogen plenum indicates that the feedback of high-pressure detonation products leads to the attenuation of ion voltage. In addition, the long-duration tests show that the ion voltage will recover to a steady state with the extension of reaction time, when the purgation (products leaving plenums) of detonation products is greater than feedback (products entering plenums) of detonation products in the hydrogen plenum. The recovery of ion voltage starts earlier at the higher equivalence ratio and air mass flux, and the peak value of ion voltage in the steady state also increases with the increase of equivalence ratio and air mass flux. A low frequency oscillation about 10–12 Hz occurs in the RDW at some operation conditions. This low frequency oscillation is related to the interaction between the combustor and hydrogen plenum, and can be eliminated by either increasing the equivalence ratio or decreasing the air mass flux.

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高压爆轰产物对燃油喷射及爆轰波传播特性的影响

通过改变氢气混合气的当量比、空气质量通量和运行时间，研究了高压爆轰产物对燃料喷射和爆轰波以离子电压形式传播的影响。实验表明，在旋转爆震波初始阶段，离子电压逐渐衰减。离子电压衰减是一种普遍现象，槽态离子电压衰减速率及其峰值与等效比和空气质量通量有关。燃烧室与氢气充气室的相互作用分析表明，高压爆轰产物的反馈导致离子电压的衰减。此外，长时间试验表明，随着反应时间的延长，当爆轰产物的净化(产物离开充气腔)大于爆轰产物的反馈(产物进入充气腔)时，离子电压将恢复到稳定状态。当当量比和空气质量通量越高时，离子电压的恢复开始得越早，稳态离子电压峰值也随着当量比和空气质量通量的增加而增大。在某些工作条件下，RDW会出现约10 - 12hz的低频振荡。这种低频振荡与燃烧室和氢气充气室之间的相互作用有关，可以通过增加等效比或减小空气质量通量来消除。

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来源期刊

Propulsion and Power Research Multiple-

CiteScore

7.50

自引率

5.70%

发文量

期刊介绍： Propulsion and Power Research is a peer reviewed scientific journal in English established in 2012. The Journals publishes high quality original research articles and general reviews in fundamental research aspects of aeronautics/astronautics propulsion and power engineering, including, but not limited to, system, fluid mechanics, heat transfer, combustion, vibration and acoustics, solid mechanics and dynamics, control and so on. The journal serves as a platform for academic exchange by experts, scholars and researchers in these fields.