华南理工大学学报(自然科学版) ›› 2010, Vol. 38 ›› Issue (3): 25-30,36.doi: 10.3969/j.issn.1000-565X.2010.03.005

• 力学 • 上一篇    下一篇

地铁列车着火后在隧道内行驶的安全速度的实验研究

郗艳红毛 军樊洪明赵耀华朱升1   

  1. 1.北京交通大学 土木建筑工程学院,北京 100044;2.北京工业大学 建筑工程学院,北京10002
  • 收稿日期:2009-06-01 修回日期:2009-09-08 出版日期:2010-03-25 发布日期:2010-03-25
  • 通信作者: 郗艳红(1980-),女,博士生,主要从事流体力学和安全工程研究. E-mail:06121404@bjtu.edu.
  • 作者简介:郗艳红(1980-),女,博士生,主要从事流体力学和安全工程研究.
  • 基金资助:

    国家重大基础研究前期专项研究项目(2005CA04700);JL京市自然科学基金资助项目(8101004)

Safety Velocity of On-Fire Train Moving in Subway Tunnel

Xi Yan-hong1  Mao JunFan Hong-ming2  Zhao Yao-hua2  Zhu Sheng1   

  1. 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. College of Architecture and Civil Engineering,. Beijing University of Technology, Beijing 100022, China
  • Received:2009-06-01 Revised:2009-09-08 Online:2010-03-25 Published:2010-03-25
  • Contact: 郗艳红(1980-),女,博士生,主要从事流体力学和安全工程研究. E-mail:06121404@bjtu.edu.
  • About author:郗艳红(1980-),女,博士生,主要从事流体力学和安全工程研究.
  • Supported by:

    国家重大基础研究前期专项研究项目(2005CA04700);JL京市自然科学基金资助项目(8101004)

摘要: 地铁列车着火后在隧道内行驶的安全性对火灾应急救援具有重要意义,而行驶速度是决定着火列车安全性的关键因素.文中以热释放速率为0~10MW的火灾为原型,在1:8的隧道模型内进行列车火灾模型实验.经过相似变换的模型火灾的热释放速率为0—55kW.采用正庚烷为燃料,利用变频风机提供的流场模拟列车在隧道中的运动情况.通过测定不同行驶速度、着火部位及火源位置时,风速与火灾热释放速率的关系、列车周围的温度场以及火灾烟气蔓延规律,并以北京地铁为例,得到着火列车在隧道内行驶的最佳速度为41.83km/h.

关键词: 地铁, 列车火灾, 热释放速率, 烟气流动, 模型实验, 安全速度

Abstract:

The safety of on-fire trains moving in subway tunnel is important to emergency rescue, and the train velocity is the key to the train safety. This paper adopts a fire prototype with a heat release rate of 0 - 10 MW to perform a model experiment of train fire in a 1 : 8 subway tunnel model. After a similar transformation, the heat release rate of the model fire reaches 0 - 55 kW. By using n-heptane as the fuel and by adopting a frequency conversion fan to form a flow field, the motion of the train in the model tunnel is simulated, and the relationship between the wind velocity and the heat release rate, the temperature field around the train and the flame/smoke pervasion rule are in- vestigated in the conditions of variable train velocity, fire location and fire source location. Finally, by taking Beijing

Key words: subway, train fire, heat release rate, flue gas flow, model test, safety velocity