管道中瓦斯爆炸过程的数值模拟

利用AutoReaGas软件对封闭的长直管道内瓦斯爆炸进行了数值模拟，研究了瓦斯的浓度对爆炸超压影响的规律. 在此基础上，进一步研究了障碍物个数和阻塞比对瓦斯爆炸超压和火焰传播速度的影响. 数值结果表明，在无障碍物的管道中，当瓦斯浓度为化学当量浓度时，爆炸超压值最大；在带有障碍物的管道中，火焰速度值随着障碍物数量的增加先增大后减小；当障碍物个数一定时，最大爆炸超压和火焰速度随阻塞比增大而增加.

Numerical Simulation of Methane Explosion Propagation in the Pipe

The propagation of methane explosion in a long closed pipe was simulated by the AutoReaGas software and the effect of methane concentration on explosion overpressure was studied. The effect of the number of obstacles and the blocking rate on the explosion overpressure and law of flame propagation were investigated. The numerical simulation results show that in the pipe without obstacles, the overpressure of the methane explosion is maximal when the gas concentration is stoichiometric; in the pipe with obstacles, the flame velocity initially increases and then decreases with the number of obstacles increasing. When the number of obstacles is fixed, the maximum explosion overpressure and the flame velocity increase with the blocking ratio increasing.