七氟丙烷对狭长受限空间油气爆炸抑制实验研究

Experimental study on suppression of gasoline- air mixture explosion in narrow and long confined space by heptafluoropropane

为研究七氟丙烷对油气爆炸的抑制作用,研制了主动式油气爆炸抑制装置,搭建了狭长受限空间油气爆炸抑制实验系统,进行了油气爆炸抑制实验,并与无抑爆介质条件进行了对比,分析了爆炸超压值、火焰传播速度和火焰强度等特性参数变化情况。实验结果表明:当以3、4和5 kg七氟丙烷作为抑爆介质时,最大超压值分别下降34.05%、50.78%和55.87%,平均火焰传播速度分别下降72.15%、79.87%和89.23%,火焰持续时间明显缩短,火焰强度减弱;随着七氟丙烷质量的增加,抑爆效果越显著。

In order to study the suppression effect of heptafluoropropane on gasoline -air mixture explosion , an active suppres-sion equipment of gasoline-air mixture explosion was developed .The experimental system for suppression of gasoline-air mix-ture explosion in narrow and long confined space was established , and the experiments on suppression of gasoline-air mixture explosion were carried out .Compared with the results under the condition of without explosion suppression medium , the change of characteristic parameters such as the explosion overpressure , the flame propagation velocity and the flame strength were analyzed .It showed that when adopting heptafluoropropane with the weight of 3 kg, 4 kg and 5 kg respectively as the explosion suppression medium , the maximum overpressure decreased by 34.05%, 50.78%and 55.87%respectively, and the average flame propagation velocity decreased by 72.15%, 79.87%and 89.23%respectively.Meanwhile, the duration time of flame shortened obviously , and the flame strength weakened .The more the weight of heptafluoropropane , the better the explosion suppression effect .