Experimental Study on Effect of Longitudinal Ventilation Velocity and Slope on Smoke Movement in Tunnels

Abstract:

The slope effects on the movement of internal smoke cannot be ignored. Fire experiments in a small scale tunnel are conducted in order to observe the smoke movement in a tunnel with three kinds of slope (0%, 3% and 5%) under different longitudinal ventilation velocity, then find the correlation between smoke diffusion velocity and longitudinal ventilation velocity, and slope in tunnel by numerical fitting and dimensional analyses, finally conclude:(1) as longitudinal ventilation velocity increases, smoke diffusion velocity gradually decreases; (2) when longitudinal ventilation velocity is smaller, with the increase of slope, smoke diffusion velocity is gradually increasing; (3) when longitudinal ventilation velocity is large, slope to smoke diffusion velocity is not affected. These quantitative conclusions provide fire Prevention of the tunnel in city with a reference.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 1381-1387
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.1381
• Online since: December 2012
• Authors: Xue Fei Xing, Jing Yan Zhang, Yan Feng Li
• Keywords: Slope, Smoke, Tunnel, Velocity

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