机械科学与技术2018，Vol.37Issue(7)：1125-1131,7.DOI:10.13433/j.cnki.1003-8728.20180120
突扩微管中二次起爆的数值研究
Numerical Study of Detonation Re-initiation Inside a Sudden Expansion Micro-tube
摘要
Abstract
To investigate the characteristics of detonation re-initiation when the detonation wave go through a sudden expansion micro-tube,numerical study was carried out in different sudden expansion ratio tubes with the stoichiometric ratio of ethylene and oxygen (or the stoichiometric ratio of hydrogen and oxygen).Simulation results showed that,both the fuel and the sudden expansion ratio would affect the detonation re-initiation,and the larger the sudden expansion ratio is,the longer the detonation distance and the time are within a certain range of sudden expansion ratio.For the same sudden expansion ratio,the time of deflagration-to-detonation transition (DDT) was shorter for C2H4/O2 mixture,but the H2/O2 mixture has a wider expansion ratio range of the sudden expansion ratio for successfully detonation re-initiation.When the sudden expansion ratio was more than 7 for H2/O2 mixture,and the sudden expansion ratio was more than 5 for C2H4/O2 mixture,the chemical reaction zone and shock wave will not be able to couple again to form a detonation wave.关键词
微尺度/爆震/恰当比/突扩比Key words
micro-scale/detonation/stoichiometric ratio/sudden expansion ratio分类
航空航天引用本文复制引用
马鹏飞,何建男,张启斌,张建华..突扩微管中二次起爆的数值研究[J].机械科学与技术,2018,37(7):1125-1131,7.基金项目
陕西省自然科学基金项目(2016JQ1043)、西北工业大学博士创新基金项目(CX201714)及西安航空学院基金项目(2018KY1117)资助 （2016JQ1043）
