细水雾喷射角度对公路隧道火灾灭火效果的分析  

Analysis on Fire Suppression Effects with Different Spray Angles of Water Mist in Highway Tunnel

作　　者：张培红[1] 李楠[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第4期756-761,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：住房和城乡建设部研究开发项目(2007-K3-5);沈阳市大型科学仪器设备共享服务专项基金项目(2007GX-45)

摘　　要：目的研究不同油盆空间位置条件下,细水雾不同喷射角度对公路隧道油火的灭火效果,为受限狭长空间内细水雾灭火设计提供依据.方法采用FDS软件,建立公路隧道内细水雾灭油火模型,对比分析了燃料表面平均温度、油盆正上方4m处温度变化曲线,烟气层高度,隧道内1.5m高度CO体积分数.结果当火源处于细水雾喷头正下方时灭火最为有效,细水雾喷头喷射角度增加为30°～90°时灭火效果改善.结论当隧道内火源处于不同位置时,细水雾灭火效果不同,随着细水雾喷头与火源水平距离不断增大灭火效果越差.通过改变细水雾喷头喷射角度,扩大细水雾喷头保护范围,有利于扑灭火源距离细水雾喷头较远的火灾.This paper is aimed to study fire suppression effects in highway tunnel by water mist when the pool fire is set at different location and it can provide technical basis for design of water mist in the construction of long and narrow spaces. FDS（ Fire Dynamics Simulator）is applied to establish the model of oil fire in highway tunnel, following parameters are discussed to analyze the fire suppression effects, i. e. , the heat release rate of pool fire, the distribution of temperature and CO concentration, the height of smoke and other parameters in the tunnel. By means of comparison method, this paper analyzes the average temperature over the oil surface, the temperature curve at the height of 4 meters above pool fire, the volume percentage of CO in the air at 1.5 meters high in the tunnel, It is found that the fire suppression effect with water mist is quite different with the different location of fire. The most effective situation occurs when the fire is located just below the nozzle. Additionally, the effect becomes worse when the distance between the nozzle and the fire is increased. It＇s effective to expand the protecting scope of the nozzle by increasing the spray angle,which is helpful to fight against the worse case when the nozzle is far from the fire.

关 键 词：公路隧道 细水雾 火源位置 烟气蔓延 喷头角度 

分 类 号：U458.1[建筑科学—桥梁与隧道工程]