基于数值模拟的空调客车火灾特性研究

Characteristics research on air-conditioned coach fire based on numerical simulation

以某空调客车在隧道内的火灾为例,通过描述火源、大巴车的结构以及可燃物的属性,利用FDS模拟再现火灾过程。设定车窗未开、车窗打开两种火灾场景,模拟包括温度场、烟气密度、能见度以及速度场等在内的火灾参数,得到两种场景下火灾不同的发展规律。结果表明,如果在火灾发生初期,车窗就被打开,车内温度和烟气密度峰值相对较小,但上升较快。

Taking an accident of air-conditioned coach fire in tunnel as an example, by describing the fire, bus structure and properties of fuel, the bus fire process was reconstructed using FDS. Two conditions of windows being open / closed were set,and the temperature distribution, smoke density, visibility and the velocity field, etc. were simulated, to get the fire development law in 2 scenes. Results showed that, if at the early stage of the fire, the windows were opened, the peak value of temperature and smoke density would be smaller, while increase faster.