论文:2013,Vol:31,Issue(2):283-288
引用本文:
彭畅新, 王治武, 郑龙席, 陈星谷, 卢杰. 吸气式脉冲爆震发动机反传数值研究[J]. 西北工业大学
Peng Changxin, Wang Zhiwu, Zheng Longxi, Chen Xinggu, Lu Jie. Numerical Investigation of Backpropagation of Air-Breathing Pulse Detonation Engine[J]. Northwestern polytechnical university

吸气式脉冲爆震发动机反传数值研究
彭畅新, 王治武, 郑龙席, 陈星谷, 卢杰
西北工业大学 动力与能源学院, 陕西 西安 710072
摘要:
采用小能量点火方法,对吸气式脉冲爆震发动机的反传现象进行了数值研究。获得了反传现象的形成及传播特性。结果表明,吸气式脉冲爆震发动机的反传可以分为压力反传和燃气反传两部分。两者都是由缓燃和回传爆震引起的,回传爆震占主导作用。反传燃气的影响区域小于反传压力,由于尾部膨胀波的作用,反传燃气在一定位置会停止向上游进气道流动。反传压力会一直向进气道上游传播,并且迫使流道内的流体也向上游流动。等截面流道内反传压力减小的速度较慢,应对进气道进行优化设计。
关键词:    爆震    发动机    反传    数值模拟   
Numerical Investigation of Backpropagation of Air-Breathing Pulse Detonation Engine
Peng Changxin, Wang Zhiwu, Zheng Longxi, Chen Xinggu, Lu Jie
Department of Aero-Engines,Northwestern Polytechnical University,Xi'an 710072,China
Abstract:
Using spark ignition model,the phenomenon of backpropagation of air-breathing pulse detonation enginewas numerically investigated. The formation and propagation characteristics of the backpropagation phenomenonwere obtained. The results showed that the backpropagation can be divided into two parts: the pressure and the hotgas. Both the backpropagation of pressure and that of hot gas were induced by the deflagration wave and the retona-tion wave. The retonation wave played a dominant role for the backpropagation. The hot gas covered a smaller re-gion than the backpropagation pressure. The hot gas would stop traveling to the upstream inlet at a certain locationowing to the effects of the expansion waves. The backpropagation pressure would keep traveling upstream and makethe fluid in the inlet flow toward upstream. The magnitude of the backpropagation pressure decreased relativelyslowly and an optimization design for the inlet should be performed.
Key words:    backpropagation    computer simulation    mathematical models    numerical methods    pressure    pulsedetonation engines    waves;detonation   
收稿日期: 2012-05-03     修回日期:
DOI:
基金项目: 教育部博士点基金(20116102120027);陕西省自然科学基金(S2010JC3660)资助
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作者简介: 彭畅新(1985-),西北工业大学博士生,主要从事燃烧学和新概念发动机应用基础研究。
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