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http://dx.doi.org/10.7474/TUS.2017.27.1.050

A Study on the Determination of Shock Loss Coefficient on the Branch in the Double-deck Road Tunnel for Small Car  

Rho, Jang-hoon (Dept. of Energy Resources Engineering, Inha University)
Lee, Seung-jun (Dept. of Energy Resources Engineering, Inha University)
Kim, Jin (Dept. of Energy Resources Engineering, Inha University)
Publication Information
Tunnel and Underground Space / v.27, no.1, 2017 , pp. 50-57 More about this Journal
Abstract
In this study, the experiment for determining shock loss at the branch is conducted for the design of network double-deck road tunnel ventilation. The shock loss coefficient that determines the quantity of shock loss has been considered only regarding the constant aspect ratio of circular or rectangular section. However the suggestion of shock loss coefficient is needed since the aspect ratio of double-deck road tunnel for small vehicle is considered around 1:3 with the low height in Korea. The experiment model was made with the scale of around 1:23 applying Reynolds similarity law, so that the shock loss coefficient on the branch of the large aspect ratio was measured. The result of the study showed that shock loss coefficients of both split branch and straight branch were measured two to three times higher than those calculated from the theoretical equation or design values of previous studies. Therefore the study resulted the effect of large aspect ratio on shock loss coefficient was huge, and it is expected that precise design value can be suggested for the design of network double-deck tunnel ventilation.
Keywords
Network double-deck road tunnel; Small car; Aspect ratio; Shock loss coefficient;
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Times Cited By KSCI : 1  (Citation Analysis)
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