受限空间初始压力对瓦斯爆炸反应动力学特性的影响  

Effect of initial pressure on kinetic characteristics of gas explosion in enclosed space

作　　者：李艳红[1] 贾宝山[1] 曾文[2] 温海燕[1] 宋维源[3] 

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]沈阳航空工业学院动力与能源工程学院,辽宁沈阳110136 [3]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第5期697-701,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50674055);辽宁省普通高等学校创新团队资助项目(2008T081)

摘　　要：为了探求不同初始压力下瓦斯爆炸的动力学特性,采用详细的瓦斯爆炸链式反应机理(包括53种组分,325个反应),利用软件CHEMKINⅢ,对其中的SENKIN子程序包进行修改,通过数值计算和模拟,得出了在受限空间中不同初始压力对瓦斯爆炸动力学特性的影响。对不同初始压力条件下瓦斯爆炸压力和温度的变化趋势,反应物摩尔分数的变化趋势,致灾性气体的生成及变化趋势做了详细的模拟和分析。计算结果表明:初始压力对瓦斯爆炸温度影响较少,对爆炸压力影响较大;初始压力越大,瓦斯爆炸的引爆时间越短,爆炸强度越大,链式反应中自由基的摩尔分数就越小,所产生的CO摩尔分数越少,而所产生的CO2、NO和NO2摩尔分数就会越多。In order to study the effect of initial pressure on the kinetic characteristics of gas explosion,the detailed mechanisms of chain reaction（including 53 composites,325 reactions） are investigated for gas explosion process in this study.The SENKIN subprograms of CHEMKINⅢ chemical kinetics package is used and improved for modeling the chain reaction.The kinetic characteristics of gas explosion are simulated under different initial pressures in enclosed space.Under different initial pressure conditions,the gas explosion pressure and temperature,reactant concentration,generation of hazardous gases after gas explosion are simulated and analyzed.The results show that the initial pressure has little effect on gas explosion temperature while it has significant effect on gas explosion pressure.The larger the initial pressure is,the shorter the detonating time of gas explosion becomes.The greater the explosion intensity is,the lower the concentrations of free radical are.Thus,the concentration of CO produced is lower after gas explosion,and the concentrations of CO2,NO and NO2 are higher.

关 键 词：瓦斯爆炸 初始压力 链式反应 动力学特性 受限空间 自由基 瓦斯爆炸温度 瓦斯爆炸压力 

分 类 号：TD712[矿业工程—矿井通风与安全]