中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (5): 80-85.doi: 10.16265/j.cnki.issn1003-3033.2018.05.014

• 安全工程技术科学 • 上一篇    下一篇

地下换乘大厅火灾烟气温度分布研究

郝彧露1, 陈俊敏1 副教授, 陈柯衡1, 李航2 工程师, 杨明2, 李雪2   

  1. 1 西南交通大学 地球科学与环境工程学院,四川 成都 610031;
    2 重庆城市综合交通枢纽开发投资有限公司,重庆 400015
  • 收稿日期:2018-02-09 修回日期:2018-03-23 出版日期:2018-05-28 发布日期:2020-11-25
  • 作者简介:郝彧露(1991—),女,四川成都人,博士研究生,研究方向为消防工程。E-mail:hyl0919@my.swjtu.edu.cn。

Study on temperature distribution ofunderground transfer hall fire smoke

HAO Yulu1, CHEN Junmin1, CHEN Keheng1, LI Hang2, YANG Ming2, LI Xue2   

  1. 1 Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;
    2 Chongqing City Comprehensive Transportation Hub Development and Investment Co. Ltd,Chongqing 400015,China
  • Received:2018-02-09 Revised:2018-03-23 Online:2018-05-28 Published:2020-11-25

摘要: 为合理设置城市综合交通枢纽地下换乘大厅排烟口高度,基于Froude准则,搭建比例为1∶10的地下换乘大厅机械排烟-补风试验平台。利用平台和数值模拟方法,试验研究地下换乘大厅火灾烟气在3种不同热释放速率(HRR)及4种不同排烟量条件下的温度分布,并探究排烟口高度的5个数值所对应的排烟效率。结果表明:HRR是影响地下换乘大厅烟气温度的主要因素,HRR越高,顶棚烟气温度越高;排烟口高度对大空间排烟效率影响较小;烟气竖向温度分布在6 m高度处出现明显分层现象,就净空高度为10 m的换乘大厅而言,排烟口宜设置于顶棚以下2~3 m处,此工况下排烟效率较高。

关键词: 地下换乘大厅, 机械排烟, 热释放速率(HRR), 火灾烟气, 温度分布, 烟气层高度, 排烟口高度

Abstract: In order to ascertain the height of the smoke vent for an underground transfer hall in an urban comprehensive transportation hub,based on the Froude criterion,a 1∶10 ratio underground transfer hall mechanical exhaust-air-supply experimental platform was built,and experiments were carried out with the platform and the numerical simulation method.Effects of two variables being HRR and smoke extraction rate on the smoke temperature distribution were studied.The effect of the smoke vent height on smoke extraction efficiency was investigated.The results show that for an underground transfer hall fire,HRR is the most important factor affecting the smoke temperature and there is a positive correlation between the temperature of ceiling smoke and the HRR,and the smoke vent height has no apparent effect on the smoke extraction efficiency.For 10 m height transfer hall the smoke vent should be arranged at the 2-3 meters below the ceiling.

Key words: underground transfer hall, mechanical smoke exhaust, heat release rate(HRR), flue-gas, temperature distribution, smoke layer height, height of smoke vent

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