摘要
地铁站台发生火灾时,会产生大量的有毒高温烟气.一旦烟气通过站台与站厅间的楼梯向站厅扩散,将会给人员疏散和救援工作带来极大的困难.在分析了地铁站台火灾时烟气流场变化规律的基础上,提出了临界通风速度的概念.利用FDS场模拟软件,对不同条件下站台与站厅间所必需的临界通风速度进行了计算机模拟研究.研究表明:临界通风速度与火灾热释放速率成正比,与站台和站厅间楼梯口处的挡烟垂壁高度成反比.
When a fire starts in the subway platform, a lot of poisonous and high-temperature smoke will be produced. Once the smoke diffuses over the stairs between platform and concourse into the subway concourse, it is difficult to evacuate and rescue people. Based on the analysis of the variation law of smoke flow in subway platform fire, a concept about critical ventilation speed from platform to concourse was presented. By using FDS software, the critical ventilation speed from platform to concourse was studied in the different conditions. The results indicate that the critical ventilation speed is direct ratio to the heat release rate and reverse ratio to the height of the smoke barrier which lies in the stairs＇ access between platform and concourse.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2006年第1期7-10,共4页
Journal of China University of Mining & Technology
基金
国家自然科学基金项目(50174052)
关键词
地铁
烟气
火灾
临界通风速度
subway
smoke
fire
critical ventilation speed
