纵向风速对隧道中细水雾灭火效果的影响研究

Application of water mist fire extinguishing system in highway tunnel

隧道作为交通的咽喉要道,一旦发生火灾,给人员逃生带来很大的困难。利用隧道火灾模拟平台,分别对车顶和车底两个位置进行了细水雾灭火的模拟实验,研究不同风速对隧道火灾的温度、气体组分浓度和热辐射等参量的影响,据此研究细水雾灭火系统在隧道火灾中抑制、扑灭火灾,降低火场温度、净化火源附近空气以及隔绝热辐射的能力。结果表明:当风速增大时,火场烟气平均温度逐渐减小,CO浓度的峰值显著降低,热辐射强度也有效降低。在实验条件下,隧道纵向通风作用有利于保障火场安全。

Because of the relatively closed environment, highway tunnel as traffic choke points, in the event of fire, will bring people great difficulties in escape. So a tunnel fire simulation platform is presented of in this paper, so as to make water mist fire extinguishing experiments. Under the condition of different wind speed, the influence of fire temperature, gas concentration, thermal radiation and other parameters is investigated. And then the water mist fire extinguishing system in tunnel fire suppression is examined to evaluate its ability of putting out fire, reducing fire temperature, purifying fire near the air and isolating heat radiation.