Effects of vent shaft location on the ventilation performance in a subway tunnel |
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Authors: | Jung-Yup Kim Kwang-Yong Kim |
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Affiliation: | aConstruction Quality Policy Department, Korea Institute of Construction Technology, Koyang 411-712, Republic of Korea;bDepartment of Mechanical Engineering, Inha University, Incheon 402-751, Republic of Korea |
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Abstract: | A computational analysis of a ventilation system in a subway tunnel is carried out by solving 3D Reynolds-averaged Navier–Stokes equations for train-induced unsteady flow using the sharp interface method as the model for the moving boundary of an immersed solid. The ventilation performance is evaluated depending on the location of the vent shaft by analyzing the ventilating flow rate through the shaft and the feature of the flow field in the subway tunnel around the shaft. It is found that the optimum location of the vent shaft with respect to maximizing ventilation performance lies near the station. |
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Keywords: | Subway tunnel Ventilation performance Vent shaft Train-induced flow Numerical analysis Moving boundary Sharp interface method |
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