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A Study of Smoke Movement in a Short Tunnel  

Kim, Sung-Chan (Department of Mechanical Engineering, Chungang University)
Ryou, Hong-Sun (Department of Mechanical Engineering, Chungang University)
Kim, Chung-Ik (Department of Mechanical Engineering, Chungang University)
Hong, Ki-Bae (Department of Thermal Engineering, Chungju National University)
Publication Information
Tunnel and Underground Space / v.12, no.1, 2002 , pp. 31-36 More about this Journal
Abstract
This paper concerns smoke propagation in tunnel fires with various size of fire source. Experiments carried out in model tunnel and those results were compared with numerical results. The Froude scaling law was used to scale model tests for comparison with larger scale tests. In order to validate for numerical analysis, temperature distribution of predicted data was compared with measured data. Examining the temperature distribution, we found that smoke layer does not come down under 50% of tunnel heights for a short tunnel heights for a short tunnel firs without ventilation. Front velocity of smoke layer is proportional to the cube root of heat release rate. And it is in good agreement with existing empirical expression and numerical prediction. In a short tunnel fire, horizontal propagation of smoke layer is more important than vertical smoke movement for evacuation plan.
Keywords
Fire safety; Buoyant flow; Heat and mass transfer; numerical analysis; Fire experiment;
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