安全、健康和环境2025，Vol.25Issue(5)：17-23,7.DOI:10.3969/j.issn.1672-7932.2025.05.003
障碍物和泄放开启时间耦合作用下氢气火焰传播特性数值模拟研究
Numerical Simulation Study of Hydrogen Flame Propagation Under the Coupling of Obstacle and Release Opening Time
摘要
Abstract
In the field of industrial safety and explosion protection,the interaction between obstacles and the opening time of relief is a key factor affecting the efficiency of explosion relief and disaster consequences.To solve the problem of unclear hydrogen flame propagation mechanism under the coupling effect of obstacles and blowdown opening time,a numerical detonation model was established based on OpenFOAM platform.A pipe with a size of 70 mm×70 mm×500 mm was adopted,and the obstacles were located in the middle of the pipe,with blocking ratios of 0,35.7%and 64.3%,respectively.The opening time of detonation was 3,5,7,9 ms,the mesh size was 5 mm,and the flame propagation characteristics of hydrogen detonation in the pipeline were studied.The results showed that the maximum overpressure in the pipeline increased with the increase of the o-pening time.When there was an obstacle in the pipeline,the obstacle will accelerate the turbulent combustion,creating a greater peak pressure.Several vortex structures were formed near the obstacles,and the vortex struc-tures in front of them promoted the flame to spread upward and downstream.Under the action of the rear vortex structure,the flame accelerated downward and backward propagation,and obvious cavities appeared near the obstacles.At the same time,due to the existence of obstacles,the flame flow area decreased,forming a strong jet effect.The larger the blockage ratio,the stronger the jet effect,and the faster the flame acceleration.Under the combined action of vortex structure and jet effect,flame propagation speed increased and overpressure in-creased.The research results showed important guiding significance for the design of hydrogen blowout in pipe-line.关键词
障碍物/开启时间/氢气泄爆/射流效应/涡旋结构Key words
obstacles/opening time/hydrogen vented explosion/jet effect/vortex structure分类
安全科学引用本文复制引用
刘锐..障碍物和泄放开启时间耦合作用下氢气火焰传播特性数值模拟研究[J].安全、健康和环境,2025,25(5):17-23,7.基金项目
国家重点研发计划项目(2023YFE0199100),氢能工厂和车辆应用过程中氢气释放扩散研究及安全标准规范构建 （2023YFE0199100）
中国石化科技部项目(KL324001),氢气燃爆事故后果的高精度数值求解方法研究. （KL324001）
