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An Experimental Study of Smoke Movement in Tunnel Fires with a Vertical Shaft  

이성룡 (중앙대학교 기계공학부 대학원)
유홍선 (중앙대학교 기계공학부)
김충익 (중앙대학교 기계공학부)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.16, no.2, 2004 , pp. 135-141 More about this Journal
Abstract
The present paper concerns a smoke movement in a tunnel fire with a vertical shaft. The model tunnel measured 13.4m long, 0.4m wide and 0.4m high. The cross section is 1： 20 of a full scale tunnel. Ethanol was used as a fuel. The fire size in model tests varied from 1.35 kW to 13.37 kW, which corresponds to full scale fires of 2.41 to 23.91 MW. Smoke front velocity and temperatrue were decreased due to the vertical shaft install. Temperature was reduced maximum about 2$0^{\circ}C$ at ceiling and about 23$^{\circ}C$ at vertical position. CO concentration was reduced as the vent width widened. When vent width was more than 15 cm, CO concentration was not reached 100 ppm. Descent degree of the smoke layer was confirmed through the visualization.
Keywords
Tunnel fire; Smoke movement; Natural ventilation; Vertical shaft;
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  • Reference
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