中梁山隧道火灾通风排烟的数值模拟

Numerical simulation of ventilation and smoke exhaust of Zhongliangshan tunnel fire

根据中梁山地铁区间隧道的实际情况确定最不利的通风排烟模式,利用FDS对火灾时的通风排烟进行模拟,分析隧道内不同时刻、不同截面位置的烟流特性参数。模拟结果显示,射流风机作用下火区上游通风风速为2.5 m/s,没有产生回流,起火列车人员能够安全疏散。烟流前锋面到达非起火列车的时间超过850 s,大于非起火列车人员疏散完成时间。

The worst ventilation and smoke exhaust mode was determined according to the actual situation of Zhongliangshan metro tunnel.FDS was used for ventilation and smoke exhaust simulation,in order to analyze smoke flow property parameters at different time and on different cross sections.The simulation results showed that there was no recirculation when ventilation velocity of upper fire area was 2.5 m/s under the action of jet fan and on that case people on the flaming train could evacuate safely.The arrival time of smoke flow front surface to the train not on fire,longer than the time for people to evacuate,was over 850 s.