地铁车站敞开楼梯口空气幕挡烟效果测试  

Experiment on the smoke blockage by air curtains installed at the front opening of stairs in subway station

作　　者：吴振坤[1] 张和平[2] 盛业华 陈震[1] 翁韬[1] 胡隆华[2] 张孝春[2] 

机构地区：[1]安徽省消防总队,安徽合肥230000 [2]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026 [3]合肥城市轨道交通有限公司,安徽合肥230000

出　　处：《消防科学与技术》2013年第3期257-260,共4页Fire Science and Technology

基　　金：公安部消防局科研计划项目(2011XFCX007);国家"十二五"科技支撑计划项目(2011BAK03B02)

摘　　要：通过在某真实的地铁站台开展的全尺寸空气幕挡烟效果实验,研究了不同火源距离下,空气幕出口射流速度和角度对挡烟效果的影响。实验发现,当火源距离楼扶梯口较远时,较小的射流速度和竖直向下的射流角度能起到很好的挡烟效果;当火源距离楼扶梯口较近时,适当增加角度可以有效延长挡烟时间;空气幕出口射流风速取5～7m/s、倾角取15°～30°时挡烟效果较好;排烟系统开启对烟气蔓延的控制作用优于空气幕,但空气幕并不妨碍排烟系统的排烟效果。Full-scale experiment of smoke blockage of air curtains were carried out in a real subway station. The smoke blockage effect of air curtain exit jet velocities and angles on scenarios of different fire source distances were studied. It was found that moderate and straight downward exit jet velocity can prevent the smoke movement very well when the fire source relative far from stairs; the smoke blockage ability of air curtain can be ef- fectively improved by increasing the air curtain exit jet angle properly when the fire source is close to stairs; when the veloci- ty is 5-7 m/s, and the angle is 15°-30°, the effect is the best; the smoke exhausting system is better than the air cur- tain, but the air curtain won＇t influence the smoke exhausting system.

关 键 词：空气幕 楼扶梯口 射流速度 射流角度 挡烟效果 

分 类 号：X913.4[环境科学与工程—安全科学] U231.96[交通运输工程—道路与铁道工程]