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矿井乏风瓦斯点火延迟时间的数值模拟
引用本文:余明高,刘欣华,邓权威.矿井乏风瓦斯点火延迟时间的数值模拟[J].河南理工大学学报(自然科学版),2012,31(2):130-135.
作者姓名:余明高  刘欣华  邓权威
作者单位:1. 河南理工大学安全科学与工程学院,河南焦作,454000
2. 河南理工大学安全科学与工程学院,河南焦作454000 中国科学技术大学热科学与能源工程系,合肥230026
基金项目:国家自然科学基金资助项目,河南省基础与前沿技术研究计划项目
摘    要:运用Chemkin程序和GRI-Mech3.0机理,对入射激波诱导下矿井乏风瓦斯点火延迟时间进行数值模拟.首先,根据乏风瓦斯燃烧基元反应敏感性分析,定义CH,峰值出现的时刻为乏风瓦斯的点火延迟时间,然后分别研究瓦斯体积分数、入射激波速度、乏风瓦斯初始温度、初始压力对点火延迟时间的影响.研究结果表明,入射激波速度、乏风瓦斯初始温度、初始压力的增加均会使燃烧温度增加,CH3峰值增加,点火延迟时间缩短,其中入射激波速度的增加缩短点火延迟时间的效果最为显著,乏风瓦斯体积分数变化(0.1%-1.0%)对点火延迟时间的影响较小.

关 键 词:乏风瓦斯  入射激波  数值模拟  点火延迟时间

Numerical simulation on the ignition delay time of ventilation air methane in coal mining
YU Ming-gao,Liu Xin-hua,Deng Quan-wei.Numerical simulation on the ignition delay time of ventilation air methane in coal mining[J].JOURNAL OF HENAN POLYTECHNIC UNIVERSITY,2012,31(2):130-135.
Authors:YU Ming-gao  Liu Xin-hua  Deng Quan-wei
Institution:1,2(1.School of Safety Science and Engineering,Henan polytechnic University,Jiaozuo 454000,Henan,China;2.Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230026,China)
Abstract:The ignition delay time of ventilation air methane in coal mining induced by incident shock was numerically studied by Chemkin code and GRI-Mech 3.0 mechanisms.Initially,according to the sensitivity analyzing of elementary reactions,the ignition delay time of ventilation air methane was defined by the topic value of the mole fraction of CH3.Then,main attentions were paid to the effects of the ventilation air methane concentration,initial temperature and initial pressure,and the incident shock velocity on the ignition delay time.It is found that,with the increment of the incident shock velocity,the initial temperature and initial pressure of ventilation air methane,the temperature and the topic value of the mole fraction of CH3 were increased,and the ignition delay time would be shortened.The incident shock velocity play an important role of shortening the ignition delay time.The ventilation air methane concentration,during 0.1%~1.0%,however,has no significant effect on the ignition delay time.
Keywords:ventilation air methane  incident shock  numerical simulation  ignition delay time
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