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封闭空间瓦斯爆炸过程的反应动力学分析
引用本文:梁运涛.封闭空间瓦斯爆炸过程的反应动力学分析[J].中国矿业大学学报,2010,39(2).
作者姓名:梁运涛
作者单位:煤炭科学研究总院沈阳研究院煤矿安全技术国家重点实验室,辽宁,沈阳,110016
基金项目:科技部科研项目,国家自然科学基金 
摘    要:为了获取瓦斯爆炸过程中反应动力学参数,通过修改化学动力学计算软件CHEMKINIII中的SENKIN程序包,采用甲烷燃烧的化学动力学详细反应机理(包括16种组分、41个反应),建立了定容弹中瓦斯爆炸过程的计算模型.利用该模型对瓦斯爆炸过程中温度、压力及反应物浓度的变化趋势进行了模拟分析,同时通过对瓦斯爆炸详细反应机理的敏感性分析,找出了影响瓦斯爆炸以及爆炸后部分致灾性气体生成的关键反应步.结果表明:瓦斯爆炸后温度、压力将分别达到2800K,0.24MPa左右;促进瓦斯爆炸的关键反应步为CH3+O2=CH3O+O,CH4+HO2=CH3+H2O2;促进CO与CO2生成的关键反应步为CH3+O2=CH3O+O,CH4+O2=CH3+HO2,CH4+HO2=CH3+H2O2,CH3+HO2=CH3O+OH,H+O2=OH+O.

关 键 词:瓦斯爆炸  化学动力学模型  数值模拟  敏感性分析  致灾性气体

Analysis of Reaction Kinetic for Gas Explosion in Enclosed Space
LIANG Yun-tao.Analysis of Reaction Kinetic for Gas Explosion in Enclosed Space[J].Journal of China University of Mining & Technology,2010,39(2).
Authors:LIANG Yun-tao
Affiliation:LIANG Yun-tao(State Key Laboratory of Coal Mine Safety Technology,Shenyang Branch of China Coal Research Institute,Shenyang,Liaoning 110016,China)
Abstract:The SENKIN code of the CHEMKIN III chemical kinetics package was modified to include a computational gas-explosion model within a constant volume. The code was used to analyze reaction kinetics during a gas explosion. The detailed reaction mechanism included 16 reactive species and 41 reaction steps. The effect of temperature,pressure and mole-fraction was examined. Sensitivity analysis indicated the key steps that affect gas explosions and which gas mixtures were most prone to explosion. After explosion th...
Keywords:gas explosion  chemical reaction kinetics model  numerical simulation  sensitivity analysis  catastrophic gases
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