大连理工大学学报Issue(4)：413-417,5.DOI:10.7511/dllgxb201404007
初始压力对爆轰波在管道内传播的影响
Effect of initial pressure on propagation of detonation wave in round tube
摘要
Abstract
Detonation tube was built to investigate the effect of initial pressure on the propagation of detonation wave in round tube.The premixed gas of CH4+2O2 was selected as experimental gas. Optical fiber probe was used to measure the local velocity of detonation wave.Smoked foils were used to register the cellular structure of detonation wave in tubes.The experimental results show that there are five distinct modes during the propagation of detonation wave in tubes,which are stable mode,rapid fluctuation mode,stuttering mode,galloping mode and failure mode.Under the mode of stable detonation,the fluctuations of the local velocity of detonation wave are generally small and the averaged velocity of detonation wave is close to the theoretical CJ value.The detonation wave has multi-headed cellular structure.With decreasing of the initial pressure,the fluctuations of the local velocity of detonation wave increase,and the averaged velocity of detonation wave decreases.For the galloping detonation,at the decoupled position,cellular structure disappears.Cellular structure forms again when overdriven detonation occurs.If the initial pressure is further decreased till the detonation failure,no cellular structure is observed.关键词
爆轰波/初始压力/爆轰速度/胞格结构Key words
detonation wave/initial pressure/detonation velocity/cellular structure分类
化学化工引用本文复制引用
喻健良,高远,闫兴清,高伟..初始压力对爆轰波在管道内传播的影响[J].大连理工大学学报,2014,(4):413-417,5.基金项目
辽宁省科学技术计划资助项目(2012231008) （2012231008）
