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利用FDS对典型卧室火灾场景进行模拟,对比不同室外环境风速对火灾发展及热环境的影响。研究表明,热释放速率峰值随着风速增大而增大,达到最大值后保持不变,有风情况下的轰燃时间和到达热释放速率峰值时间提前,风对火场起到助燃和冷却作用,较低的风速即可驱动热烟气向下风向蔓延,使上风向及下风向的温度存在明显差别,风速越高流向下风向的热流量越大,火灾蔓延出起火房间的可能性增大。
FDS was used to simulate the typical bedroom fire scene and compare the effects of different outdoor wind speeds on fire development and thermal environment. The results show that the peak value of heat release rate increases with the increase of wind speed and remains unchanged after reaching the maximum value. The time of the flashover and the arrival of the peak heat release rate in windy time are earlier, and the wind plays a role of supporting combustion and cooling in the fire field , The lower the wind speed can drive hot flue gas downwind spread, so that the upwind and downwind temperatures are significantly different, the higher the wind speed the greater the amount of heat flow to the downwind, the greater the likelihood of the fire spread out of the fire room .