地铁车站火灾排烟模式仿真研究

基于对地铁车站火灾产物影响的分析,以广州地铁13号线白江站为研究对象,使用PyroSim软件构建地铁车站火灾排烟模式仿真模型,对地铁车站火灾烟气扩散特性、火灾产物发展趋势等进行仿真分析。在此基础上,提出以加快烟气消散速度、减缓温度上升速度和增加能见度距离为优化目标的6种优化方案,并进行仿真对比分析。结果表明:当火源位于站台中部时,在站台加设排风机可有效提升火灾排烟效率,同时在部分区域设置有效高度的挡烟垂壁可对烟气控制起到有效的辅助作用。

Simulation study on smoke exhaust mode of subway station fire

Based on the analysis of the influence of the fire products of the subway station,taking Baijiang station of Guangzhou metro line 13 as the study case,this paper uses PyroSim software to establish the simulation model of the fi re smoke exhaust mode of the subway station,and carries on the simulation analysis of the fire smoke diffusion characteristics and the development trend of the fire products of the subway station.On this basis,it proposes six optimization schemes to accelerate the smoke dissipation speed,slow down the temperature rise speed and increase the visibility distance.The results show that when the fire source is located in the middle of the platform,adding exhaust fan in the platform effectively improves the efficiency of fire smoke extraction,and at the same time,setting the effective height of smoke baffle wall in some areas plays an effective auxiliary role in smoke control.