摘要
通过开展大型火灾试验,分析火灾蔓延途径和火灾情况下商铺内温度分布,研究相对封闭的地下空间内的火灾燃烧特性。将火源位置设置于房间中部和墙角处,分析火源位置对火蔓延特性的影响。试验结果表明,使用机械排烟和自然补风时,商铺内未发生轰燃,只出现了燃烧相对缓慢的火蔓延现象。燃料的摆放方式可削弱火蔓延趋势。火源位于商铺中间时,火蔓延只持续了较短时间后熄灭,其蔓延路径与前人提出的一维线性蔓延假设不一致。火源位于墙角时,火焰沿着墙面附近快速蔓延,火灾持续时间是火源位于商铺中间时的两倍以上。
Based on the large-scale fire experiments, the combus- tion characteristics of underground shop fires was studied by analyzing the fire spread and temperature distribution. The firesource was set in the middle and corner of the room to analyze the influence of fire location on the fire spread characteristics. The results showed that in the case of mechanical smoke ex hausting and natural air feeding, no flashover but fire spreading with slow burning occurred. The display mode of fuel changed the trend of fire spreading. When the source of ignition was played in the middle of shops, the fire died out after a short time spreading. Its spreading path was different from the one dimensional linear spread proposed by predecessors. And when the source of ignition was played at the corner of wall. the flame spread rapidly along with the wall surface. The duration of fire spreading was two times and more of that with the source of ignition played in the middle of shops.
出处
《消防科学与技术》
CAS
北大核心
2016年第12期1666-1669,共4页
Fire Science and Technology
关键词
地下商铺
火灾试验
燃烧特性
火蔓延
蔓延路
径
温度分布
underground shop
fire experiment
combustion charae-teristic
fire spread
spread path
temperature distribution
