双重异性障碍物下掺氢甲烷的燃爆压升效应  

Pressure Rise Effect of Hydrogen-Methane Mixture Combustion under Dual Heterogeneous Obstacles

作　　者：徐阳 李冕 李元兵 龙凤英 XU Yang;LI Mian;LI Yuanbing;LONG Fengying(Safety Supervision and Management School,Chongqing Vocational Institute of Safety&Technology,Chongqing 404121,China;Safety Vocational Education Research Institute,Chongqing Vocational Institute of Safety&Technology,Chongqing 404121,China;School of Architecture and Environmental Safety,Chongqing Vocational Institute of Safety&Technology,Chongqing 404121,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)

机构地区：[1]重庆安全技术职业学院安全监督管理学院,重庆404121 [2]重庆安全技术职业学院安全职业教育研究所,重庆404121 [3]重庆安全技术职业学院建筑与环境安全学院,重庆404121 [4]南京理工大学机械工程学院,江苏南京210094

出　　处：《高压物理学报》2025年第5期76-84,共9页Chinese Journal of High Pressure Physics

基　　金：中国高校产学研创新基金-新一代信息技术创新项目(2021ITA08007);重庆市职业教育教学改革研究项目(Z2241166)。

摘　　要：气体燃爆灾害特性是国内外研究的热点和重点,研究复杂约束条件下的燃爆特性极具意义。针对刚性障碍物和柔性障碍物,通过实验探究了长直形管道中双重异性障碍物下掺氢甲烷气体的燃爆过程。结果表明:较无障碍物环境,双重障碍物对火焰速度、爆炸压力以及爆炸强度指数的影响表现为随柔性障碍物阻塞率的提高和掺氢的置入而提升,并且爆炸压力和爆炸强度指数的增幅高于火焰速度的增幅。在掺氢和双重障碍物的共同作用下,火焰接触速度增幅可达176.51%,最大速度增幅达316.40%。双重障碍物导致上游区域出现压力先升后降现象,下游区域的压力振荡明显;掺氢后,与无障碍环境相比,管内最大爆炸压力增幅可达1280.9%,最大爆炸强度指数提升至167.65倍。在约束设施布局工程项目中,应首选较小阻塞率的柔性障碍物,以有效减轻爆炸危害。The disaster characteristics of gas combustion and explosion are hot and key topics in domestic and international research.Studying the combustion and explosion characteristics under complex constraint conditions is of great significance.Regarding rigid and flexible obstacles,the combustion and explosion process of hydrogen-doped methane gas in a long straight pipeline with double heterogeneous obstacles was explored through experiments.The results show that,compared with the obstacle-free environment,the influence of double obstacles on the flame speed,explosion pressure,and explosion intensity index increases with the increase in the blockage ratio of the flexible obstacle and the addition of hydrogen.Moreover,the increase in explosion pressure and explosion intensity index is greater than that of the flame speed.Under the combined action of hydrogen addition and double obstacles,the flame contact speed can increase by up to 176.51%,and the maximum speed can increase by up to 316.40%.The double obstacles cause the pressure in the upstream region to rise first and then fall,and the pressure oscillation in the downstream region is obvious.After hydrogen addition,compared with the obstacle-free environment,the maximum explosion pressure in the pipeline can increase by up to 1280.9%,and the maximum explosion intensity index can increase to 167.65 times.In the layout engineering projects of constraint facilities,flexible obstacles with a smaller blockage ratio should be preferred to effectively mitigate the consequences of explosion hazards.

关 键 词：气体燃爆 双重障碍物 火焰速度 爆炸压力 爆炸强度指数 

分 类 号：O382.1[理学—流体力学] O521.9[理学—力学]