Research on Blast Extinguishment of Pool Fire by Using Micro Explosive

用微爆药(叠氮化银药丸)对甲烷-空气扩散火焰进行了爆炸灭火实验研究。为了弄清爆炸灭火的特性，以火焰高度、爆炸能量和爆炸点到火焰底部的距离为参数。结果表明，离爆炸点的灭火距离取决于叠氮银爆炸产生的冲击波的有效距离，且灭火距离除以爆炸能量的1/3次方的值趋于恒定。

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.