等泄压比条件下连通容器泄爆实验研究

通过开展单个容器和连通容器内预混气体的泄爆实验,分析连通条件下容器泄爆的压力变化和火 焰传播过程。实验结果表明:连通容器内气体爆炸湍流燃烧,容器的最大泄爆压力和最大压力上升速率均超 过单容器,特别是最大压力上升速率更高,差别更大;在等泄压比条件下,连通容器中传爆容器的最大泄爆压 力比起爆容器高,且当传爆容器为小容器时,最大泄爆压力更高;随着管长的增加,传爆容器的最大泄爆压力 增加,起爆容器的最大泄爆压力变化不大;连通容器泄爆过程,火焰在管道中加速传播。在相同管长条件时, 小球容器向大球容器传爆的火焰传播速率高于大球容器向小球容器传爆的火焰速率。

Experimental study on premixed flammable gas explosion venting in linked vessels under the same effictive vent area

Explosion venting was carried out in both linked and single vessels under the same dimensionless effective vent area conditions to study flame propagation and explosion pressure evolution.It is shown that the maximum reduced explosion pressure and the maximum pressure rise rate in the linked vessels exceed those in the single vessels,especially,the difference of the maximum pressure rise rates is much greater between the linked vessels and the single vessels.At the same dimensionless effective vent area,the maximum reduced explosion pressure in the receiving vessel of the linked vessels,is higher than that in the releasing vessel.When the receiving vessel is smaller than the releasing vessel,the maximum reduced explosion pressure in the receiving vessel is much higher.With the increase of the pipe length,the maximum reduced explosion pressure in the receiving vessel increases,and the maximum reduced explosion pressure in the releasing vessel changes unconspicuously.During the explosion venting in the linked vessels,the flame propagates acceleratively in the pipe.And at the same pipe lengths,the flame propagation speed from a small vessel to a big vessel is higher than that from a big vessel to a small vessel.