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A numerical study on smoke movement in longitudinal ventilation tunnel fires for different aspect ratio
- Issue Date
- Jun-2006
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- tunnel fire; ventilation; smoke movement; aspect ratio; critical velocity
- Citation
- BUILDING AND ENVIRONMENT, v.41, no.6, pp 719 - 725
- Pages
- 7
- Journal Title
- BUILDING AND ENVIRONMENT
- Volume
- 41
- Number
- 6
- Start Page
- 719
- End Page
- 725
- ISSN
- 0360-1323
1873-684X
- Abstract
- In this study, numerical simulation was carried out to analyze the effect of the aspect ratio on smoke movement in tunnel fires using FDS 3.0. Temperature distribution under the ceiling showed a relatively good agreement with experimental results within 10 degrees C. It confirmed the possibility of application of FDS code to tunnel fires. Results from varying of the aspect ratio showed good agreement with experimental data. Temperature near the fire source decreased with the increase of the aspect ratio. But, the rate of the temperature decrease was reduced by the decrease of the heat loss in the spanwise direction. Clear height of the simulation by the analysis of the velocity distribution was about 3% higher than that of the experimental result. Numerical results predicted the back-layering distance and the critical velocity reasonably. (C) 2005 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > School of Mechanical Engineering > 1. Journal Articles
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