不同类型射流起爆爆震波特性的数值研究  

Numerical Research of the Different Types of Jet Effect on Detonation Initiation Characteristics

作　　者：王治武[1] 陈星谷[1] 郑龙席[1] 彭畅新[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》2014年第4期618-623,共6页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(51306153);陕西省自然科学基金(2014JM7258);高等学校博士学科点专项科研基金新教师类资助课题(20116102120027);西北工业大学基础研究基金(NPU-FFR-JCY20130129)资助

摘　　要：为了研究不同类型射流对起爆特性的影响,对3种不同类型射流起爆主爆震室中丙烷/空气可燃混合气体的过程进行了数值模拟。结果表明,现有计算条件下,亚声速射流不能在主爆震室中起爆爆震波,而超声速射流和爆震射流能够成功起爆;爆震射流的起爆时间和距离都比超声速热射流的要小;在爆震射流的起爆过程中,爆震射流的形成占用了绝大多数的时间,因此对形成爆震射流这一阶段进行有效的改进将可以减少主爆震管的总起爆时间。In order to investigate the effect of different types of hot jet on detonation initiation characteristics, the detonation initiation process was simulated by employing CFD software. The processes for detonation initiation with jets of different types, including subsonic jet, supersonic jet and detonation jet, were analyzed. Stoichiometric pro-pane-air mixture was used as the fuel-oxidant of the pre-detonator and main detonation tube. The simulation results and their analysis indicated preliminarily that：（1） the propane-air mixture in the main detonation tube could not be initiated with the subsonic jet, but could be initiated with the supersonic jet and detonation jet under the current simulation conditions;（2） the initiation distance and time with the detonation jet were both shorter than those with supersonic jet;（3） the generation of the detonation jet took up most of the time in the detonation initiation process with detonation jet, hence, acceleration of the generation of the detonation jet would reduce the total initiation time of the propane/air in the main detonation tube.

关 键 词：爆震波 起爆 射流 数值研究 脉冲爆震发动机 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]