黑龙江科技大学学报2018，Vol.28Issue(1)：113-119,7.DOI:10.3969/j.issn.2095-7262.2018.01.022
天窗对中庭商厦火灾烟气流动与安全疏散时间的影响
Influence of skylight on fire smoke flow characteristics and safe evacuation time in atrium building
摘要
Abstract
This paper is concerned with a study building on Harbin new first department store as the re-search object.The research involves using the large eddy numerical simulation by FDS(Fire Dynamics Simula-tor) to analyze the law underlying the smoke diffusion in atrium fire and platform fire, when skylights are open and closed.The numerical results show that keeping the skylights open allows most of the high temperature gas and high concentration toxic gas to be discharged in time out of the commercial buildings, with the result that the smoke could only affect visibility above the third floor;keeping skylights open could provide a reduction by as many as 252, 157, 82 and 64 s respectively in the safety evacuation time from floor 3 to 6 in atrium fire and by as many as 23.9,62.8,94.4,181.0 s respectively in platform fire;leaving the skylights open could pro-vide a more effective control both for the atrium fire in the floor 3 and 4 and the platform fire in the floor 5 and 6;the dangerous critical value occurs faster in the boundary of fire source floor in atrium fire than in platform fire and the opposite is found to be the case with the other floors;and the diffusion rates of smoke in all direc-tions ranging from large to small are defined as vertical upward, horizontal, and vertical downward.The study may provide a theoretical basis for the fire performance and evacuation plan design of atrium buildings.关键词
火灾烟气/中庭商厦/天窗/安全疏散/大涡模拟Key words
fire smoke/atrium commercial building/skylight/safe evacuation/large eddy simulation分类
资源环境引用本文复制引用
刘新蕾,孙威,沈斌..天窗对中庭商厦火灾烟气流动与安全疏散时间的影响[J].黑龙江科技大学学报,2018,28(1):113-119,7.基金项目
国家自然科学基金项目(51504088) （51504088）
瓦斯等氢气输送管网安全基础研究国家级专业中心实验室开放课题( HKDGH-20140008) （ HKDGH-20140008）
