基于FDS的公路隧道大型客车火灾数值模拟及分析

Numerical Simulation and Analysis of Bus Fire in Highway Tunnel Based on FDS

公路隧道大型客车火灾严重威胁隧道结构和司乘人员的安全。考虑座椅、内饰、行李、轮胎等不同材料的燃烧属性,建立精细化的大客车模型,对其在隧道中燃烧时的烟雾场和温度场进行了模拟研究,并与20 MW平方增长火源对比。结果表明:大型客车在隧道内燃烧时,50 s后烟雾开始从车体向隧道内扩散;火灾热释放率峰值为45 MW,最高温度可达1040℃;与20 MW恒定火源相比,FDS大客车燃烧模型更接近实际情况。

Bus fires in highway tunnels pose a huge threat to tunnel structure and personnel safety.Considering the combustion properties of different materials,such as seats,decorations,luggage and tires,an elaborate numerical model of a bus is established.Through the simulation of bus fire in the tunnel,The smoke Field and temperature field are studied,and a 20 MW fire source is set up to compare with them.The results show that smoke begins to diffuse into the tunnel after 50 seconds,the peak heat release rate of bus fire is 45 MW,and the maximum burning temperature reaches 1040℃.It is closer to the actual working condition when simulating the tunnel fire with FDS burning model.