泄爆面积对连通容器预混气体泄爆影响的实验研究

在大小两个体积不等的球形容器和圆形管道组成的连通容器中,开展连通容器泄爆实验,研究连通容器等泄爆面积条件下的火焰传播和压力变化情况。结果表明：火焰从起爆容器加速传播到传爆容器,但由于容器的开口泄爆,火焰传播速率小于密闭爆炸的火焰传播速率;随泄爆面积的减小,连通容器的泄爆压力和压力上升速率均增加;连通容器爆炸受管道火焰加速和压力累积作用,在相同泄爆面积条件下,容器的最大泄爆压力和最大压力上升速率高于单个容器爆炸时的最大泄爆压力和最大压力上升速率,特别是当小容器为传爆容器时,差别更加明显,不能用单个容器的泄爆设计方法来指导连通容器的泄爆。

Experimental study on effect of venting area on premixed flammable gas explosion venting in linked vessels

Linked vessels explosion venting experiment was carried out in two different-volume spherical vessels connected by cylindrical pipes.Flame propagation and pressure development trend were studied under different venting areas.It is shown that flame accelerates during its propagation from the first vessel to the second vessel,but its speed is low compared with closed explosion＇s.Explosion pressure and maximum rate of pressure rise increase with the decrease of venting area.Both maximum pressure and maximum rate of pressure rise are greater than the values of single vessle explosion due to the effects of flame acceleration in pipe and pressure piling and the the effect is more obvious especially when small vessel is used as the second vessel.Results of this study indicate that explosion venting design standards,codes and guidance of single vessel can not be used for linked vessels.