摘要
为研究管道结构对氢-空预混气体爆炸特性影响,采用实验与数值模拟相结合的方法,分析不同管道结构内氢-空预混气体燃爆时火焰传播进程、爆炸压力、湍流动能变化及流场分布。结果表明:90°弯管对氢-空预混气体爆炸强度增强作用明显高于T型分岔管和直管。火焰阵面在结构突变处褶皱变形较明显,并出现大尺度强湍流和涡团,气团脉动速度与湍流燃烧速率不断增大,氢-空预混气体质量扩散速率与热量扩散速率增大,湍流动能呈迅速上升趋势。
In order to reveal the flame propagation process,change of explosion pressure,change of turbulent kinetic energy and the distribution of flow field during the explosion of hydrogen-air premixed gas in the pipes with different structures,the explosion processes of hydrogen-air premixed gas in the closed straight pipe,90°elbow pipe and T-shaped bifurcation pipe were studied by means of experiment and numerical simulation.The results showed that the enhancement effect of 90°elbow pipe on the explosion intensity of hydrogen-air premixed gas was obviously stronger than that of T-shaped bifurcation pipe and straight pipe.The flame front presented the obvious fold deformation at the location with the sudden change of pipe structure,and the large-scale strong turbulence and vortex mass appeared.The pulsation velocity of air mass and the turbulent combustion rate increased continuously,then the mass diffusion rate and heat diffusion rate of hydrogen-air premixed gas increased,and the turbulent kinetic energy showed a rapid rise trend.
作者
周宁
倪鹏飞
李雪
李徐伟
袁雄军
赵会军
ZHOU Ning;NI Pengfei;LI Xue;LI Xuwei;YUAN Xiongjun;ZHAO Huijun(Jiangsu Key Laboratory of Oil & Gas Storage and Transportation Technology,Changzhou University,Changzhou Jiangsu 213164,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2021年第4期65-71,共7页
Journal of Safety Science and Technology
基金
国家重点研发计划项目(2017YFC0805100)
江苏省高校自然科学研究重大项目(17KJA440001)
中国安全生产科学研究院基本科研业务费专项资金项目(2019JBKY08)。
关键词
氢-空预混气体
直管
90°弯管
T分岔管
火焰结构
hydrogen-air premixed gas
straight pipe
90°elbow pipe
T-shaped bifurcation pipe
flame structure
