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http://dx.doi.org/10.9711/KTAJ.2015.17.3.341

A numerical study on the ventilation characteristics of rainfall in road tunnel  

Lee, Ho-Hyung (Kangwon National University Graduate School of Disaster Prevention)
Lee, Seung-Chul (Kangwon National University Dept. of Fire Protection Engineering)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.17, no.3, 2015 , pp. 341-351 More about this Journal
Abstract
When rainfall occurred on road tunnel, that is likely to have influence upon ventilation force in the tunnels but the tunnels ventilation system did not consider factors of rainfall. Thus, this study investigated effects of rainfall upon ventilation force in the tunnels at no rainfall and changing of rainfall by 3 dimensional numerical method. Flow rate into road tunnels decreased as many as 52.34% at rainfall of 150 mm/hr, and pressure drop of road tunnel between entrance and exit decreased as many as 22.22%, so that rainfall had influence upon ventilation force in the tunnel. The number of necessary jet fan in road tunnels is 12 at no rainfall but, when rainfall of 80 mm/hr on road tunnels, the number of necessary jet fan in road tunnels is 16, when rainfall of 150 mm/hr on road tunnels, the number of necessary jet fan in road tunnels is 17. So, factor of rainfall should be considered at estimation of ventilation system of road tunnel.
Keywords
Road tunnel; Rainfall; Ventilation force; Ventilation system; Jet fan;
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Times Cited By KSCI : 3  (Citation Analysis)
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