细水雾系统参数对有障碍物液体火灾灭火效果的影响

利用FDS数值模拟软件,采取控制变量法设置4组数值模拟,分别研究细水雾系统水滴粒径、雾化角度、喷水强度、喷头高度对火源周围存在无法燃烧或尚未开始燃烧的障碍物情况下灭火效果的影响。研究发现,当火源设置为乙醇池火时,存在障碍物条件下,细水雾系统水滴粒径设置在250~400μm,雾化角度设为120°,喷水强度设为2.0~2.5 L/(min·m²),喷头高度距障碍物1 m时灭火效果较为理想。

Influence of water mist system parameters on liquid fire extinguishing effect with obstacles

FDS was used toset up four groups of numerical simulation by the control variable method tostudy the influence of water droplet size, atomization angle, spray intensityand nozzle height on the fire extinguishing effect of fire with obstacles thatcannot burn or has not yet begun to burn. It is found that when the fire sourceis ethanol pool fire and there are obstacles, the fire extinguishing effect isbetter; when the water droplet size of the water mist system is set at 250~400 μm,the atomization angle is set at 120° , the spray intensity is set at 2.0~2.5 L/(min·m2), and the sprinkler height is 1 m from the obstacle.