细水雾抑制瓦斯爆炸的实验研究

Experimental Investigation on Suppression of Gas Explosion with Water Mist

对内径68 mm,长1 200 mm的密闭管内甲烷爆炸的细水雾抑制效果进行了实验研究,分析了不同喷雾量对瓦斯爆炸最大爆炸压力及最大压力上升速率的影响。实验结果表明,喷雾量较小时,瓦斯爆炸的最大爆炸压力及最大压力上升速率都出现增大,达到压力峰值的时间缩短。随着喷雾量的增加,最大爆炸压力及最大压力上升速率会随着下降,达压力峰值的时间延长。这表明细水雾的喷雾量较大时,对瓦斯爆炸的抑制作用比较明显。

In this paper,the suppression of gas explosion by water mist was experimented in a closed vessel of 68 mm in diameter and 1 200 mm in length,and the effects of different amount of water mist on the maximum gas explosion pressure and the maximum pressure increase rate were analyzed.The results show that the maximum gas explosion pressure and maximum pressure increase rate increase,and the time of explosion pressure reaching the peak value decreases,at the situation of a small amount of water mist.With the increase of the amount of water mist,the maximum explosion pressure and maximum pressure increase rate decrease,and then the time of explosion pressure achieving at the peak value increases.This shows that a large amount of water mist may have more obvious influence on gas explosion.