期刊
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
卷 43, 期 -, 页码 204-212出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tust.2014.05.008
关键词
Subway station; Fire-induced smoke flow; Temperature distribution; Smoke screen; Reduced-scale experiments
资金
- National Nature Foundation of China [51176180]
- National Key Technology R&D Program of China [2011BAK031302]
- Fundamental Research Funds for the Central Universities
This paper presents experimental study on the effect of smoke screen height on temperature distribution of fire-induced flow beneath platform ceiling of subway station. A reduced-scale (1:10) subway station experimental model including the lobby, platform and tunnel is developed. The temperature beneath the platform ceiling is measured by K-type thermocouples at different fire heat release rates (HRR) simulated by using a LPG gas burner for different smoke screen heights at the stairs connecting the platform and the lobby. Results show that the temperature profile can be well correlated by an exponential decay function. The temperature decays faster generally as indicated by a higher exponential power index (K), which increases with increase in smoke screen height or decreases with increase in HRR of the fire. Based on scaling analysis, a global formula is proposed (W+2H)(1/5)/Q(1/15) (Z(0) - H)(1/3), to correlate the value of K proportionally, as well verified by the experiments. (C) 2014 Elsevier Ltd. All rights reserved.
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