L型管廊电缆舱火灾模拟分析

Fire Simulation Analysis of the Cable Cabin in L-shaped Tunnel

针对L型管廊电缆舱,通过PyroSim软件,模拟研究不同火源位置、火源功率、出口风速对管廊温度、能见度及CO浓度的影响。结果表明:L型管廊拐点处易造成烟气聚集,导致火灾危险性增加;火源位于L型管廊一侧中部时,对管廊温度、烟气浓度和CO浓度的影响较大;火源功率增大时,管廊火灾危险性增大;出口风速为5 m·s^(-1)时,对管廊火灾烟气控制较为有利。

On the cable cabin in L-shaped tunnel,a simulation was conducted with the use of PyroSim software to study the influence of different locations and power of fire source and the wind speed of the tunnel’s outlet on the temperature,visibility and CO concentration inside the tunnel.The results show that the inflection point of L-shaped tunnel is likely to cause smoke to accumulate,leading to increased fire risk;when the fire source is located in the middle of one side of L-shaped tunnel,it has greater impact on the temperature,smoke concentration and CO concentration;when the fire source power increases,the fire risk of the tunnel increases;when the outlet wind speed is 5 m·s^(-1),it is more beneficial to fire smoke control of the tunnel.