Research on Blast Extinguishment of Pool Fire by Using Micro Explosive

用叠氮化银球团微爆药对甲烷-空气扩散火焰的爆炸扑灭进行了实验研究。为了阐明爆炸扑灭的特性，将火焰高度、爆炸能量和爆炸点到火焰底部的距离作为参数进行变化。结果发现，叠氮化银爆炸产生的爆炸波有效距离决定了离爆炸点的灭火距离，其爆炸熄灭概率始终一致，且灭火距离除以爆炸能量的三分之一次方的值为常数。

Investigation of blast extinguishment of a methane-air diffusion flame by using micro-explosive charges (silver azide pellets) has been performed experimentally. In order to clarify the characteristics of blast extinguishment, the flame height, explosion energy and distance from the explosion point to the flame base were varied as a parameter. As a result, it is found that the flame extinguishing distance from the explosion point, in which the blast extinguishment probability shows always unity, depends on the effective distance of blast wave produced by silver azide explosion, and the value of the flame extinguishing distance divided by explosive energy to the power of one third becomes constant.