Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (3): 25-30，36.doi: 10.3969/j.issn.1000-565X.2010.03.005

• Mechanics • Previous Articles     Next Articles

Safety Velocity of On-Fire Train Moving in Subway Tunnel

Xi Yan-hong1  Mao Jun1  Fan 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)

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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