高压细水雾灭火系统抑制古建筑轰燃的试验研究

Experimental study of high⁃pressure fine water mist fire extinguishing system to suppress flashover ignition in ancient buildings

为探明高压细水雾对古建筑火灾轰燃的抑制效果,通过Pyrosim软件模拟与搭建试验平台的方式进行试验,测定了火灾联动报警下细水雾的自启动时间,以及不同喷雾强度下古建筑火灾烟气层温度、火场热释放速率,并结合综合轰燃预测法分析了开启细水雾时古建筑内轰燃发生状况。结果表明,当火灾发生后103 s时开启细水雾,喷雾强度1.3 L/(min.m2)的高压细水雾能抑制古建筑火灾轰燃,喷雾强度2.0 L/(min.m2)的高压细水雾能熄灭古建筑火灾;试验证明了高压细水雾能够有效地抑制古建筑火灾轰燃,为高压细水雾灭火系统应用于古建筑消防设计提供参考。

In order to investigate the effect of high-pressure fine water mist on the suppression of ancient building fires,this paper simulates and builds an experimental platform through Pyrosim software to determine the the self starting time of fire water mist under fire linkage alarm,temperature of the smoke layer of ancient building flashover under different spray intensities,the rate of heat release from the fire,combined with a comprehensive fire prediction method to analyse the occurrence of flashover in an-cient buildings when the fine water mist is turned on.The results show that the fine water mist turned on 103 s after the fire oc-curred;the high-pressure water mist with a spray intensity of 1.3 L/(min·m2)can suppress the ancient building flashover,and the high-pressure water mist with a spray intensity of 2.0 L/(min·m2)can extinguish the ancient building flashover.High-pressure fine water mist can effectively inhibit the ancient building flashover,the study can provide reference for high-pressure fine water mist fire extinguishing system applied to the ancient building fire de-sign.