A study on ceiling jet characteristics in an inclined tunnel

被引：47
作者：
Huo, Y. [1 ]
Gao, Y. [1 ]
Chow, W. K. [2 ]
机构：
[1] Harbin Engn Univ, Coll Aerosp & Civil Engn, Harbin, Heilongjiang, Peoples R China
[2] Hong Kong Polytech Univ, Res Ctr Fire Engn, Dept Bldg Serv Engn, Kowloon, Hong Kong, Peoples R China
来源：
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2015年 / 50卷
关键词：
Inclined tunnel; Large eddy simulation; Data fitting; FDS; SMOKE TEMPERATURE; FIRE; VELOCITY; FLOW; VENTILATION; MOVEMENT; CHANNEL;
D O I：
10.1016/j.tust.2015.06.009
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The characteristics of a ceiling jet of an inclined tunnel in a fire will be studied and reported in this paper. Scale modeling experiments on a ceiling jet in a model tunnel of length 3.0 m, width 0.8 m and height 1.0 m inclined at different angles of 0 degrees, 10 degrees, 20 degrees and 30 degrees were carried out. Numerical studies by large eddy simulation were then performed. Both experimental observation and numerical simulation indicated that the characteristics of the temperature and velocity fields near the upper tunnel are different from those obtained using the empirical equations reported in the literature. Another set of empirical equations for gas temperature and flow velocity along the tunnel were fitted by experimental data. These derived empirical equations are useful for estimating the temperature and flow velocity patterns for the ceiling jet in an inclined tunnel with an angle within the range 0-30 degrees. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：32 / 46
页数：15
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