Effect of guide vanes on recovering uniform flow in a ventilation duct in an existing twin-track subway tunnel

Title
Effect of guide vanes on recovering uniform flow in a ventilation duct in an existing twin-track subway tunnel
Author(s)
류경진정상현[정상현]송동주막슈다쥬래바
Keywords
PERFORMANCE; SIMULATION
Issue Date
201501
Publisher
KOREAN SOC MECHANICAL ENGINEERS
Citation
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.29, no.1, pp.251 - 258
Abstract
The steady three-dimensional airflow in a subway tunnel was analyzed using ANSYS CFX software by solving Reynolds-averaged Navier-Stokes equations. A ventilation system in a model subway tunnel was developed by analyzing the mass flow rate through the ventilation shafts and the airflow in the tunnel. The airflow in the tunnel and mass flow rate in the shafts were investigated with a guide vane, porous zone, and air-curtain installed in the subway model tunnel. A mechanical shaft of an existing subway tunnel in Seoul was analyzed to apply the developed ventilation system to the tunnel. The ducts of the mechanical shaft were connected in two different ways, and guide vanes were installed in the shafts. An emergency duct between the ducts of the mechanical shaft was used to connect the ducts and install the precipitator. An axial flow fan in the duct was used to induce swirling flow. Guide vanes were installed at one side and both sides of the shaft before the electric precipitator to obtain uniform flow, which enhances the performance of the precipitator. A proper duct connection for higher mass flow rate was obtained. The installation of guide vanes on both sides led to more uniform flow in the duct. The developed ventilation system was applied to the actual subway tunnel by connecting ducts and installing the guide vanes on both sides of the ducts.
URI
http://hdl.handle.net/YU.REPOSITORY/33709http://dx.doi.org/10.1007/s12206-014-1231-y
ISSN
1738-494X
Appears in Collections:
중앙도서관 > rims journal
공과대학 > 기계공학부 > Articles
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