受限空间N_2对CH_4最大爆炸压力的影响实验与模拟研究  

Influence Experiment and Simulation Study of N_2 on the Maximum Explosion Pressure of CH_4 in the Limited Space

作　　者：贾宝山[1,2] 肖明慧[1,2] 王连聪 李守国 JIA Baoshan;XIAO Minghui;WANG Liancong;LI Shouguo(College of Safety Science and Engineering,Liaoning Technical University,Fuxin 123000,China;Key Laboratory of Mine Thermodynamic Disaster&Control of Ministry of Education(Liaoning Technical University),Fuxin 123000,China;State Key Laboratory of Coal Mine Safety Technology,CCTEG Shenyang Research Institute,Shenyang 113112,China)

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]矿山热动力灾害与防治教育部重点实验室(辽宁工程技术大学),辽宁阜新123000 [3]煤科集团沈阳研究院有限公司煤矿安全技术国家重点实验室,辽宁沈阳113112

出　　处：《矿业安全与环保》2018年第2期11-14,20,共5页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51174109);国家"十二五"科技支撑计划项目(2011ZX05041-003)

摘　　要：为了研究N_2对CH_4最大爆炸压力的影响,选取单组分N_2,根据CH_4燃烧化学动力学原理,利用20 L球形定容弹实验研究了N_2对一定浓度的CH_4最大爆炸压力的影响;应用CHEMKIN模拟软件,选取相同的工况条件,对混合气体爆炸进行了数值模拟,并将实验数据与数值模拟数据进行对比。研究结果表明:在邻近CH_4爆炸界限浓度时,随着CH_4浓度的升高,起爆时间也随之增加;在CH_4爆炸上限浓度附近,最大爆炸压力随CH_4浓度升高而降低,在CH_4爆炸下限浓度附近,最大爆炸压力随CH_4浓度升高而升高;最大爆炸压力实验数据与数值模拟数据的变化趋势相似,但数值上偏差较大,并对产生偏差的原因进行了分析。A single component N2 was selected in order to study the effect of N2 on the maximum explosion pressure of CH4,according to the chemical kinetics principle of CH4 combustion,the effect of N2 on the maximum explosive pressure of CH4 was studied by using 20 L spherical constant volume bomb,a numerical simulation of the mixed gas explosion was carried out by using CHEMKIN simulation soft ware that under the same working conditions,the experimental data were compared with the numerical simulation data and the results showed that near the concentration of the CH4 explosion,the detonation time increases with the increase of CH4 concentration;the maximum explosive pressure decreases with the increase of CH4 concentration near the upper limit of methane explosion,the maximum explosive pressure increases with the increase of CH4 concentration near the lower limit of methane explosion;the experimental data and simulation data of the maximum explosion have similar change trend,but the numerical deviation is large,and the reason for it was analyzed.

关 键 词：氮气 甲烷 受限空间 瓦斯爆炸 最大爆炸压力 数值模拟 

分 类 号：TD712.7[矿业工程—矿井通风与安全]