摘要
采用FDS对地铁隧道火灾时不同的横向火源位置以及不同竖井长宽比情况下自然排烟的效果进行数值模拟研究,分析了隧道内的烟气扩散特性及温度和能见度的分布状况。结果表明,火源位于隧道的不同横向位置只影响近火源区的烟气温度,不会对竖井的排烟效果产生影响;竖井长宽比越大,排烟效果相对越好。结果可为地铁工程排烟设计提供参考。
Using FDS, the numerical simulation was made on effi?ciency of natural ventilation under different fire location and differ?ent length to width ratio of shaft, and the smoke spread characteris?tics, temperature and visibility was analyzed. The results showed that different fire location could affect the temperature near the fire location, the effect of smoke exhausting would not be affected; the larger the length to width ratio of shaft was, the better the smoke exhausting. The results can give references for the smoke exhaust design of subway project.
出处
《消防科学与技术》
北大核心
2017年第6期768-771,共4页
Fire Science and Technology
关键词
地铁隧道
通风竖井
自然排烟
火源位置
数值模拟
subway tunnel
ventilation shaft
natural smoke exhaust
fire location
numerical simulation
作者简介
史玉晓(1991-),女,西安建筑科技大学材料与矿资学院安全工程专业硕士研究生,主要从事建筑防火性能化设计的研究,陕西省西安市碑林区雁塔北路13号,710055。
