隧道火灾过程的动态数值模拟

为了解某特长隧道发生火灾后,隧道内烟雾及温度的分布情况,利用地下工程火灾原理建立了计算隧道内空气温度、壁面温度及火灾烟雾浓度的火灾模型,并编制了动态仿真程序.对隧道内不同位置发生火灾时,隧道内空气温度、壁面温及火灾烟雾浓度随时间、空间的分布情况进行了模拟计算,给出了隧道内不同位置发生火灾时不发生烟气回流的通风控制要求,并分析了火灾时高温烟气对风机损坏的情况.

Dynamic Numerical Simulation of the Tunnel Fire Process

In order to study the situation of tunnel smog and temperature after the fire in Tunnel, this paper established a fire model for calculating air temperature, the temperature of cliff side and calculating the concentration of fire smog in the tunnel with the fire principle of the underground project. Also, the calculation procedure of emulation has been worked out. Above-mentioned model and fire smog concentration with the time in different location had been simulated when the fire takes place in different positions, the requirement of ventilation without the backset current of exhaust gas was obtained for the fire in different positions of the tunnel. At last, the situation that the jet fans were damaged by the high- temperature exhaust gas is analyzed.