运动车辆对隧道火灾顶棚射流温度分布的影响

以公路隧道内小轿车着火、客车驶经火源的场景为例，依托某隧道工程建立火灾计算模型，利用重叠网格技术和火灾数值模拟方法，研究了车辆运动速度对隧道火灾温度分布的动态影响规律.结果表明:当车辆以11.11m/s的速度经过火源时，火源中心横、纵截面隧道顶部的烟气温度最低；当车辆诱导气流对温度分布的影响达到最大时，横断面烟气温度呈现出由着火车道至车辆经过车道先降低、后升高的规律；在最高温度点上游15m范围内纵向烟气温度平稳衰减，且在车速为11.11m/s时衰减速率最大.

Influence of Moving Vehicles on Temperature Distribution of Tunnel Fire Ceiling Jet

Taking the scene of car fire and bus driving through fire source in highway tunnel as an example， a fire calculation model was established based on a tunnel project， and the dynamic influence law of vehicle motion speed on temperature distribution of tunnel fire was studied by using overset mesh technology and fire numerical simulation method. The results show that when the vehicle passes through the fire source at the speed of 11.11m/s， the smoke temperature at the top of the cross and longitudinal sections of the fire source is the lowest. When the influence of vehicle-induced airflow on the temperature distribution reaches the maximum， the cross sectional smoke temperature from the ignition lane to the vehicle passing through the lane shows a pattern of first decrease and then increase.In the range of 15m upstream of the highest temperature point， the longitudinal smoke temperature decays steadily， and the decay rate reaches maximum when the vehicle speed is 11.11m/s.