摘要
自然排烟隧道火灾烟气排放效果与竖井高度密切相关。文章利用火灾模拟软件FDS对7种不同高度竖井的排烟效果进行模拟计算,分析了烟气蔓延长度、烟气层高度、2 m高处温度、2 m高处能见度、2 m高处CO浓度的变化规律。模拟结果表明:7种隧道排烟竖井高度均满足人员疏散要求,考虑地面美观和施工成本,推荐竖井高度值为4.5 m。
Smoke exhausting effect during natural ventilation tunnel fires are closely related to the shaft height.This paper adopted a fire simnlation software FDS to simulate the effect of smoke exhausting under seven different shaft heights.Comparative analysis were made on the variation of smoke spread length,smoke layer height, 2 m high temperature,2 m high visibility, 2m high CO concentration.The results showed that seven kinds of tunnel exhaust shaft height meet evacuation requirements, considering ground aesthetics and construction costs, recommend optimization of the shaft height was 4.5 m.
出处
《企业技术开发》
2015年第8期13-15,共3页
Technological Development of Enterprise
基金
湖北省自然科学基金计划面上项目"集中排烟隧道火灾烟气层吸穿及失稳特性"(2015CFB200)
湖北省教育厅科学研究计划重点项目"隧道点式排烟模式下火灾烟气控制机制研究"(D20151207)
关键词
自然排烟
竖井高度
数值模拟
natural smoke exhaust
shaft height
numerical simulation
