吸气式脉冲爆震发动机反传数值研究  

Numerical Investigation of Backpropagation of Air-Breathing Pulse Detonation Engine

作　　者：彭畅新[1] 王治武[1] 郑龙席[1] 陈星谷[1] 卢杰[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《西北工业大学学报》2013年第2期283-288,共6页Journal of Northwestern Polytechnical University

基　　金：教育部博士点基金(20116102120027);陕西省自然科学基金(S2010JC3660)资助

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。Using spark ignition model, the phenomenon of backpropagation of air-breathing pulse detonation engine was numerically investigated. The formation and propagation characteristics of the backpropagation phenomenon were obtained. The results showed that the backpropagation can be divided into two parts： the pressure and the hot gas. Both the backpropagation of pressure and that of hot gas were induced by the deflagration wave and the retonation wave. The retonation wave played a dominant role for the backpropagation. The hot gas covered a smaller region than the backpropagation pressure. The hot gas would stop traveling to the upstream inlet at a certain location owing to the effects of the expansion waves. The backpropagation pressure would keep traveling upstream and make the fluid in the inlet flow toward upstream. The magnitude of the backpropagation pressure decreased relatively slowly and an optimization design for the inlet should be performed.

关 键 词：爆震 发动机 反传 数值模拟 

分 类 号：V231.22[航空宇航科学与技术—航空宇航推进理论与工程]