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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.11 No.4
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Experimental study on vehicle-induced unsteady flow in tunnel

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2009, v.11 no.4, pp.411-417


& (2009). Experimental study on vehicle-induced unsteady flow in tunnel. (사)한국터널지하공간학회, 11(4), 411-417.
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Abstract

The thermo-flow field in road tunnel is influenced by some facts such as piston effect of vehicle's move, operation of ventilation facilities, natural wind and buoyancy effect of fire plume. Among those, piston effect is one of primary causes for formation of air flow in road tunnel and has an effect on initial direction of smoke flow in tunnel fire. In this study to analyze the unsteady flow in the tunnel caused by the run of vehicle, the experimental study of vehicle-induced unsteady flow on a reduced-scale model tunnel is presented. While the three types of vehicle shape such as basic type of rectangular shape, diamond-head type and stair-tail type are changed, the pressure and air velocity variations with time are measured. The rising ratio of pressure and velocity are in order of “basic type of rectangular shape > stair-tail type > diamond-head type”. The experimental results would be good data for development of a numerical method on the vehicle-induced unsteady tunnel flow.

keywords
도로터널, 피스톤 효과, 터널유동, 차량형상, 축소모형실험, Road tunnel, piston effect, tunnel flow, vehicle shape, model experiment

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