刚性障碍物对含尘瓦斯爆炸的激励效应  

Effect of rigid obstacles on the excitation of methane-coal dust explosions

作　　者：徐景德 卢鸿玉[1] 卢森涛 刘钧海 汪志萼 荣晶晶 XU Jingde;LU Hongyu;LU Sentao;LIU Junhai;WANG Zhie;RONG Jingjing(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China;School of Safety Engineering,North China Institute of Science and Technology,Yanjiao 065201,Hebei,China;School of Management Engineering,Capital University of Economics and Business,Beijing 100070,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南232000 [2]华北科技学院安全工程学院,河北燕郊065201 [3]首都经济贸易大学管理工程学院,北京100070

出　　处：《安全与环境学报》2025年第4期1330-1338,共9页Journal of Safety and Environment

基　　金：国际自然科学基金项目(51874134);华北科技学院科技基金项目(3142018018)。

摘　　要：为探究刚性障碍物对含尘瓦斯爆炸的激励效应,通过使用中尺度爆炸激波管试验系统,结合激光纹影技术,设置不同数量的刚性障碍物以及是否有煤尘参与的工况,通过分析火焰传播、爆炸压力以及流场变化情况,探讨刚性障碍物对爆炸的影响。结果表明:障碍物的存在显著增加了湍流强度,加速火焰传播,提升爆炸压力。在障碍物的参与下,单一瓦斯爆炸的最大爆炸压力为323.681 kPa,增加了23.75%,而在含尘瓦斯爆炸中,最大爆炸压力为365.645 kPa,增加了21.82%,煤尘的参与进一步加剧了爆炸强度,障碍物引发的湍流促进了煤尘的悬浮与再燃。刚性障碍物对爆炸的激励效应随着刚性障碍物数量的增加而增强,尤其在含尘瓦斯爆炸中更加明显。This study aims to investigate the excitation effect of rigid obstacles on methane-coal dust explosions by exploring how these obstacles influence the flow field,flame propagation,and pressure variations during such explosions.The research simulates the impact of varying numbers of obstacles in underground tunnels on methane and coal dust explosions,utilizing laser schlieren technology to observe how these obstacles affect the explosion flow field and flame propagation.Sensor data was integrated to analyze the maximum explosion pressure and flame propagation speed.The study found that obstacles significantly heightened turbulence and accelerated flame propagation,particularly in methane-coal dust explosions,where the excitation effect of the obstacles was notably more pronounced.By disturbing the gas flow field,generating vortices,and facilitating the reburning of coal dust,obstacles significantly heightened explosion intensity and flame propagation speed.In scenarios without coal dust,the maximum explosion pressure increased by 23.75%as the number of obstacles rose.Conversely,in methane-coal dust explosions,the maximum explosion pressure increased by 21.82%.When both rigid obstacles and coal dust contributed to the excitation effect of the explosion,their combined influence exhibited a phenomenon of mutual inhibition.The coupling effect of the two was less than the linear superposition of their individual effects,yet remained greater than the impact of either factor alone.The excitation effect of rigid obstacles on explosions primarily impacts the adjacent areas.As the number of obstacles increases,the shock waves generated by the explosion reflect,oscillate,and superimpose between the obstacles.The stretching and deformation of the flame enlarge the flame front area,thereby accelerating the chemical reactions.This paper presents a comprehensive study on the excitation effect of obstacles in methane-coal dust explosions using laser schlieren technology.It provides new experimental data and theoretical insights t

关 键 词：安全工程 含尘瓦斯爆炸 刚性障碍物 激励效应 

分 类 号：X932[环境科学与工程—安全科学]