Temperature characteirsitics of flame ceiling jet generated by fire on train in subway tunnel

被引：0
|
作者：
Mao J. [1 ]
Xi Y.-H. [1 ]
Fan H.-M. [2 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University
[2] College of Architecture and Civil Engineering, Beijing University of Technology
来源：
Huanan Ligong Daxue Xuebao/Journal of South China University of Technology (Natural Science) | 2010年 / 38卷 / 03期
关键词：
Ceiling jet; Model experiment; Numerical simulation; Subway; Train fire;
D O I：
10.3969/j.issn.1000-565X.2010.03.004
中图分类号：
学科分类号：
摘要：
In this paper, 1:8 scale model experiments and numerical simulations were performed to analyze the temperature characteristics of flame ceiling jet generated by a fire at the head and the tail of a train in a subway tunnel. The results were then compared with those at the train center. It is found out that, if the fire occurs at the train head and tail, the maximum temperature of the flame ceiling jet appears at the location of δ=0.25H away from the tunnel roof, while it appears at the location of δ=0.18H if the fire occurs at the train center, all these being diffe-rent from that of the gas ceiling jet appearing at the location of 0.01H away from the tunnel roof; that the vertical temperature along the tunnel changes piecewise under a stable combustion state, so the maximum temperature at the fire on the train head and tail reduces parabolically, while that at the fire on the train center reduces linearly; and that, being a certain distance away from the train, the flame significantly weakens, and the maximum temperature of the flame ceiling jet exhibits an exponential decay.
引用
收藏
页码：17 / 24
页数：7
相关论文
共 12 条
  • [1] Hasemi Y., Tokunaga T., Some experimental aspects of turbulent diffusion flames and buoyant plumes from fire sources against a wall out in a corner of walls, Combustion Science and Technology, 40, pp. 1-17, (1984)
  • [2] Alpert R., Flows C.-J., SFPE Hand-Book Of Fire Protection Engineering, pp. 233-246, (1995)
  • [3] Hitoshi K., Yasushi O., Hiroomi S., Et al., Fire properties in near field of square fire source with longitudinal ventilation in tunnels, Fire Safety Journal, 38, pp. 319-340, (2003)
  • [4] (2007)
  • [5] Hu L.H., Huo R., Wang H.B., Et al., Experimental studies on fire-induced buoyant smoke temperature distribution along tunnel ceiling, Building and Environment, 42, 11, pp. 3905-3915, (2007)
  • [6] Hu L.H., Huo R., Li Y.Z., Et al., Tracking a ceiling jet front for hot smoke tests in tunnels, Journal of Fire Sciences, 25, 2, pp. 99-108, (2007)
  • [7] Hu L.H., Huo R., Wang H.B., Et al., Experimental and numerical studies on longitudinal smoke temperature distribution upstream and downstream from the fire in a road tunnel, Journal of Fire Sciences, 25, 1, pp. 23-43, (2007)
  • [8] Wang Y.-F., Gong Y.-F., Jiang J.-C., Et al., Fire test of tunnel with openings on roof, Journal of PLA University of Science and Technology: Natural Science Edition, 9, 3, pp. 248-254, (2008)
  • [9] Hinkley P.L., Wraight H.G.H., Theobald C.R., The contribution of flames under ceilings to fire spread in compartments, Fire Safety Journal, 7, pp. 227-242, (1984)
  • [10] Mao J., Xi Y.-H., Fan H.-M., Analysis of the characteristics of the flame ceiling jet temperature due to train fire in subway tunnels, China Civil Engineering Journal, 43, 2, pp. 119-126, (2010)
12