磁场对瓦斯爆炸及其传播的影响  

Effects of magnetic field on methane explosion and its propagation

作　　者：叶青[1,2,3] 林柏泉 菅从光[2] 贾真真 

机构地区：[1]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221008 [3]义马煤业集团股份有限公司,河南义马472300

出　　处：《爆炸与冲击》2011年第2期153-157,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(51004048);国家重点基础研究发展计划(973计划)项目(2005cb221506);煤炭资源与安全开采国家重点实验室开放研究基金项目(09KF05);中国博士后基金项目(20100470998);湖南省教育厅基金项目(09C409)~~

摘　　要：为了弄清煤矿井下巷道中变电站、大型机电设备等产生较强的磁场对瓦斯爆炸的影响机理和影响程度,实验研究了外加磁场对瓦斯爆炸过程中爆炸应力波和火焰传播速度的影响,并从磁场影响瓦斯爆炸及其传播的传质、传热、反应过程等进行了理论分析。研究结果表明:外加磁场能增加瓦斯爆炸强度和火焰传播速度以及增大压力波超压峰值和火焰传播速度峰值,并且随着磁场强度的增大,磁场效应对瓦斯爆炸的作用增强。外加磁场能增大瓦斯爆炸反应及其传播过程的传质作用、传热作用、对流作用、反应物的扩散系数和改变反应系统的熵,以致增大湍流,增大火焰燃烧速率、加快火焰传播速度、释放更多的能量并增强爆炸波能量,从而促进瓦斯爆炸及其传播。To master the effect of the magnetic fields produced by the giant mechanical and electrical equipments in coal mines on methane explosion,experimental investigations were conducted to explore the influences of the magnetic fields on explosion wave pressure and flame propagation velocity of methane explosion.And theoretical analysis was carried out to discuss the effect of the magnetic fields on heat transportation,mass transportation and reaction process of methane explosion and its propagation.It shows that the magnetic field can enhance methane explosion intensity and increase flame propagation velocity,explosion pressure.The more the magnetic field intensity,the more markedly the magnetic field affects methane explosion.The magnetic fields can increase turbulence by increasing mass transfer action,heat transfer action,convection effects,diffusion coefficient and entropy of the reaction system,so the magnetic fields can increase flame combustion velocity,flame propagation velocity,release more energy and increase shock wave energy,and then promote the methane explosion and its propagation.

关 键 词：爆炸力学 爆炸强度 磁场 瓦斯爆炸 传热 传质 熵 

分 类 号：O36[理学—流体力学]