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Aerodynamic Drag Reduction on High-performance EMU Train by Streamlined Shape Modification

유선형 형상 개선을 통한 고성능 EMU 열차의 공기저항 저감 연구

  • Received : 2012.11.09
  • Accepted : 2013.04.27
  • Published : 2013.06.30

Abstract

The effect of modifying the shape of a high-performance EMU train on the aerodynamic drag is studied here using Computational Fluid Dynamics(CFD) based on three dimensional Steady-state Navier-Stokes equation and two equation turbulence modeling. FLUENT 12 and Gambit 2.4.6 are employed for a numerical simulation of the aerodynamic drag of a streamlined-shape train as well as a proto type train. The characteristics of the aerodynamic drag of trains in tunnels are analyzed in a comparison with these characteristics in an open space. The contribution of the aerodynamic drag of each case is also investigated to establish principal pertaining to drag reduction for urban trains in tunnels. The aerodynamic drag of a streamlined train was reduced to 9.8% relative to a proto-type train with a blunt nose and a protruding roof facility and underbody shape: the running resistance is expected to be reduced by as much as 4% at a running speed of 80km/h.

Acknowledgement

Supported by : 국토해양부

References

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  1. A STUDY ON THE AERODYNAMIC DRAG REDUCTION OF HIGH-SPEED TRAIN USING BOGIE SIDE FAIRING vol.19, pp.1, 2014, https://doi.org/10.6112/kscfe.2014.19.1.041
  2. A Study on the Contribution of Exterior Devices to Running Resistance in High-Speed Trains vol.18, pp.4, 2015, https://doi.org/10.7782/JKSR.2015.18.4.309
  3. Assessment of the Running Resistance of a High-speed Train Using a Coasting Test vol.17, pp.3, 2014, https://doi.org/10.7782/JKSR.2014.17.3.165