受限空间内脉冲细水雾灭木垛火试验  

Experimental study on wood crib fire in confined space suppression performance of water mist under cycling discharge mode

作　　者：戈剑[1] 

机构地区：[1]中国人民武装警察部队学院,河北廊坊065000

出　　处：《消防科学与技术》2016年第4期540-543,共4页Fire Science and Technology

摘　　要：为研究循环动作时间对细水雾扑灭木垛火效果的影响,搭建了脉冲细水雾灭火试验平台,改变细水雾循环动作时间,在1.5m×1.5m×1.5 m的受限空间内进行了灭火试验,分析了脉冲细水雾作用过程中温度场及氧含量的变化。研究表明,脉冲细水雾对木垛火有很好的抑制作用,能够在较短的时间内熄灭木垛表面明火,但无法彻底扑灭木垛内部火;针对试验中的木垛尺寸及形式,喷10s、停10s是一个最佳的脉冲时间参数,在该工况下灭火效率最高、灭火效果最好。In order to study the effect of cycling time for wood crib fire extinction performance with water mist under cycling discharge modes, we conducted a series of experiments in a 1.5 m×1. 5 m×1.5 m confined spaco by changing the cycling time and recording the changes of temperature and oxygen concentra- tion before and after the application of water mist. The results show that the water mist, under cycling discharge modes, can well restrain the wood crib fire and effectively extinguish the surface fire, but not so effective for the inner fire in wood cribs. For the wood crib fire of the given scale in the study, on 10 s and off 10 s are the optimal cycling time and under this condition the water mist presents the best fire suppression performance.

关 键 词：细水雾 脉冲喷洒 木材堆垛火 最佳脉冲时间 

分 类 号：X924.4[环境科学与工程—安全科学] TU892[建筑科学]