Abstract:

FDS was used to set up four groups of numerical simulation by the control variable method to study the influence of water droplet size, atomization angle, spray intensity and nozzle height on the fire extinguishing effect of fire with obstacles that cannot burn or has not yet begun to burn. It is found that when the fire source is ethanol pool fire and there are obstacles, the fire extinguishing effect is better; 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. 

Key words: water mist, FDS, numerical simulation, fire extinguishing effect, obstacle