Experimental study on curved flame characteristics under longitudinal ventilation in a subway tunnel

Zhang, S, Cheng, X, Zhu, K, Yao, Y, Shi, L and Zhang, H 2017, 'Experimental study on curved flame characteristics under longitudinal ventilation in a subway tunnel', Applied Thermal Engineering, vol. 114, pp. 733-743.


Document type: Journal Article
Collection: Journal Articles

Title Experimental study on curved flame characteristics under longitudinal ventilation in a subway tunnel
Author(s) Zhang, S
Cheng, X
Zhu, K
Yao, Y
Shi, L
Zhang, H
Year 2017
Journal name Applied Thermal Engineering
Volume number 114
Start page 733
End page 743
Total pages 11
Publisher Elsevier
Abstract Curved flame is one of the determining aspects in evaluating the risk of tunnel fire. In this study, a series of experiments are carried out to investigate the characteristics of fires in a reduced-scale tunnel model, including the center-line trajectory, length and tilt angle of curved flame. It can be known from the experiments that the total flame length in the tunnel without longitudinal ventilation is almost equal to that in open space. For the flame in the tunnel with longitudinal ventilation, a third-power relationship is shown in the center-line trajectory equation of the curved flame. Meanwhile the length of curved flame can be obtained by the method of calculus. Based on the experimental data from this study, an empirical model is developed to predict the tilt angle of the curved flame, which is based on Oka's model but with much improved accuracy for the curved flames in the tunnel.
Subject Construction Engineering
Keyword(s) Flame length
Longitudinal ventilation
Subway tunnel
Tilt angle
Trajectory equation
DOI - identifier 10.1016/j.applthermaleng.2016.12.023
Copyright notice © 2016 Published by Elsevier Ltd.
ISSN 1359-4311
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