T型地下综合管廊电缆火灾数值模拟

Numerical simulation on cable fire in T-shaped underground pipe gallery

针对特殊结构的T型地下综合管廊,运用FDS软件模拟不同火源位置及风速条件下管廊内电缆火灾的蔓延情况,分析火灾发生后管廊温度场以及烟气蔓延情况。对T型管廊内不同位置处起火的火灾危险性进行排序,得到管廊内部风速为1.5m/s且电缆处于稳定燃烧期时,交叉口处的烟气层高度最低,发现T型交叉口处的烟气特性,为T型地下综合管廊消防设计提供参考。

This paper focuses on the T-shaped underground pipe gallery.FDS software was used to simulate the spread of cable fire in the pipe gallery under different fire source locations and wind speed conditions.The temperature field of the pipe gallery and the spread behavior of smoke after the fire were analyzed.The fire hazards at different locations in the T-shaped pipe gallery were sorted.When the wind speed inside the pipe corridor is 1.5 m/s and the cable is in a stable burning period,the height of the smoke layer at the intersection is the lowest.The characteristics of smoke at the intersection of T-shaped pipe gallery were obtained.The results of this work can provide some reference for fire safety design of Tshaped underground pipe gallery.