摘要
利用数值模拟软件建立某地铁站台公共区的部分区域模型,根据不同形式镂空率吊顶设置了多种工况,对该区域的火灾烟气扩散以及点型感烟火灾探测器响应时间进行模拟,结果表明:小镂空率格栅吊顶对烟气上升过程影响明显,烟气沿着垂直格栅的方向扩散,格栅镂空率和格栅方向直接影响到点型感烟火灾探测器的响应时间;不同格栅间隙对于烟气扩散影响则较小。
Model for partial platform level public area of certain metro station is established by using numerical simulation software.Multiple working conditions are set up according to drop ceilings with various hollowing rates,thus fire smoke diffusion and response time of point-type smoke detector in the area are simulated.The results show that low hollowing rate grid drop ceiling has obvious impact on the rising process of smoke,and the smoke diffuses along direction perpendicular to the grid.Response time of point-type smoke detector is directly affected by hollowing rate and direction of grid drop ceiling.The size of grid gap has less impact on smoke diffusion.
作者
刘苏敏
LIU Sumin(China Railway Siyuan Survey and Design Group Co.,Ltd.,430063,Wuhan,China)
出处
《城市轨道交通研究》
北大核心
2021年第12期121-124,共4页
Urban Mass Transit
关键词
城市轨道交通
地下车站
消防
urban rail transit
underground station
fire protection
