纵向排烟和高压细水雾耦合对隧道火灾的抑制作用

Suppression on the Tunnel Fire by Coupling the Longitudinal Smoke Discharge and High Pressure Water Mist

利用长宽高为6 m×1.5 m×2 m的隧道模型,进行了纵向排烟和高压细水雾灭火实验.通过对火源附近各测点温度的测试,分析了不同工作压力高压细水雾对柴油池火的控制效果,以及纵向排烟和细水雾不同的开启时间对控火效果的影响.结果表明:对于油面尺寸为250 mm×200 mm的柴油池火,在没有纵向排烟情况下,6 MPa细水雾就可以有效扑灭柴油池火;在纵向排烟和高压细水雾同时开启的情况下,15 MPa细水雾的控火和灭火效果最好;在高压细水雾启动之前30 s优先开启纵向排烟的话,可以达到很好的灭火效果.

Abstract： The tunnel model （6 m×1.5 m×2 m） was used to the fire-suppression experiment under the combined effect of the longitudinal smoke discharge and water mist. The temperatures near the fire source were measured to analyze the fire-suppression effect under the different pressure of water mist, as well as the different start time of high pressure water mist and longitudinal smoke discharge. The results showed that to the 250 mm × 200 mm diesel pool fire, the 6MPa water mist can effectively extinguish the diesel pool fire without the longitudinal smoke discharge. If the longitudinal smoke discharge and high pressure water mist was started at the same time, 15MPa water mist can control fire the best. When the longitudinal smoke discharge is started 30 seconds earlier than the water mist, fire can be extinguished more effectively.