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Experimental investigation on the characteristics and propagation of fire inside subway train
Tunnelling and Underground Space Technology ( IF 6.7 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.tust.2020.103632
Min Peng , Xudong Cheng , Wei Cong , Hui Yang , Long Shi , Richard Yuen , Heping Zhang

Abstract With the rapid development of subway systems, the related fundamental knowledge is critically needed to benefit their designs and fire hazard assessment. The experimental study was performed in a 1/5th scale subway train model to characterize the fire inside subway train, and the experiment in open space was also conducted as a control group. Results show that in the case where the ceiling flame has not yet propagated to the sidewalls of the subway train, the normalized ceiling flame length varies as 1/4 power of the non-dimensional ceiling heat release rate. In addition, the temperature distributions at different transverse distances from the fire source follow the exponential decay law effectively, the decay rate is indeed a function of normalized transverse distance from the longitudinal centerline. An empirical model involving dimensionless transverse and longitudinal coordinates is proposed to predict the two-dimensional temperature underneath the ceiling, which is reasonably well fitting with experimental results from this study and literatures.

中文翻译:

地铁列车内火灾特性及蔓延的实验研究

摘要 随着地铁系统的快速发展,急需相关的基础知识来帮助其设计和火灾危险评估。实验研究在 1/5 比例的地铁列车模型中进行,以表征地铁列车内部的火灾,并在开放空间中进行实验作为对照组。结果表明,在天花板火焰尚未传播到地铁列车侧壁的情况下,标准化的天花板火焰长度以无量纲天花板热释放率的1/4次方变化。此外,距火源不同横向距离处的温度分布有效地遵循指数衰减规律,衰减率确实是距纵向中心线的归一化横向距离的函数。
更新日期:2021-01-01
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