车门状态对地铁车厢火灾烟气浓度的影响

摘要

利用 FDS(Fire Dynamics Simulator)火灾动力学模拟软件对北京地铁 B 型车厢进行火灾模拟，得到车厢顶部烟气浓度随时间的变化规律。在不同火源类型、火源位置、送风口速度情况下，车门开启时车厢顶部各测点的烟气浓度均高于车门关闭时。车厢顶部烟气浓度随车厢送风口速度增大而减小。%The FDS (Fire Dynamics Simulator) software was used to simulate the fire model for the type B carriage of subway in Beijing. The temporal variation laws of smoke concentration was given through experiments. Under different conditions of fire types, fire location and air outlet wind velocity, the level of smoke concentration on the top of subway was higher when the subway door was opened than closed. It was found out that the smoke concentration on the top of subway decreased with air outlet wind velocity increased.