侧泄爆口数量对受限空间内氢气甲烷爆炸特性的影响

Effect of the Number of Side Vents on the Explosive Characteristics of Hydrogen-Methane in Confined Spaces

摘要: 为了减少受限空间内氢气甲烷爆炸的危害，采用实验的方法在方形管100 mm × 100 mm × 1000 mm中开展爆炸试验，借助高速摄像技术和压力采集技术，研究了侧泄爆口数量对掺氢甲烷爆炸特性影响。结果表明：当第一个泄爆口开设在距离点火源200 mm时，随着泄爆口数量的增加，火焰在传播至第一个泄爆口的速度不受泄爆口数量的影响，火焰经过泄爆口后，火焰结构被破坏失去加速的基础。火焰在两个泄爆口之间时，在流场的作用下会略微加快火焰速度。但增加泄爆口的数量，下游的超压越来越小，但上游超压双口泄爆和三口泄爆的相差不大。

Abstract: In order to reduce the hazards of hydrogen methane explosion in the confined space, using experimental methods in the square tube 100 mm × 100 mm × 1000 mm to carry out explosion tests, with the help of high-speed camera technology and pressure acquisition technology, the study of the number of side relief ports on the hydrogen-doped methane explosion characteristics. The results show that: when the first vent opened in the distance from the ignition source 200 mm, with the increase in the number of vents, the flame propagation to the first vent speed is not affected by the number of vents, the flame through the vent, the flame structure is destroyed to lose the basis of acceleration. Flame propagation is slightly accelerated by the action of the flow field when the flame is between two vents. However, increase the number of vents, the downstream overpressure is getting smaller, but the upstream overpressure double-ported relief and three-ported relief is not much difference.