한국철도학회논문집 (Journal of the Korean Society for Railway)

  • 제16권3호
  • /
  • Pages.169-174
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  • 2013
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  • 1738-6225(pISSN)
  • /
  • 2288-2235(eISSN)
한국철도학회 (The Korean Society for Railway)
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유선형 형상 개선을 통한 고성능 EMU 열차의 공기저항 저감 연구

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

  • 투고 : 2012.11.09
  • 심사 : 2013.04.27
  • 발행 : 2013.06.30
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초록

고성능 EMU 열차의 형상 개선을 통한 공기저항 저감 효과를 알아보기 위하여 3차원정상 Navier-Stokes 방정식과 2방정식 난류 모델을 이용한 전산유체역학을 이용하여 수치해석을 수행하였다. 전산시뮬레이션에는 FLUENTTM ver.13과 Gambit 2.4.6이 사용되었으며, 기본 형상과 유선형으로 개선된 형상에 대하여 계산을 수행하였다. 또한, 터널 내 주행 시의 공기저항 특성을 살펴보기 위하여 개활지에서의 공기저항 계산도 수행하였으며, 차량 별 공기저항 기여도에 대한 분석도 수행되었다. 유선형으로 개선된 형상의 열차는 절편형 전두부와 돌출된 상부 및 하부구조를 가진 기본 형상 열차에 비하여 약 9.8%의 공기저항이 저감된 것을 확인하였으며, 공기저항 저감에 따른 주행저항의 저감은 시속 80km/h에서 약 4%에 이르는 것으로 나타났다.

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.

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참고문헌

  1. S.W. Kim, H.B. Kwon, Y.G. Kim, T.W. Park (2006) Calculation of resistance to motion of a high-speed train using acceleration measurements in irregular coasting conditions, Proc. IMechE, 220, pp. 449-459.
  2. H.B. Kwon, B.B. Kang, B.Y. Kim, D.H. Lee, H.J. Jung (2010) Parametric study on the aerodynamic drag of ultra high-speed train in evacuated tube - part 1, Journal of the Korean Society for Railway, 13(1), pp. 44-50.
  3. H.B. Kwon, S.W. Nam, D.H. Kim, Y.J. Jang, B.B. Kang (2010) Parametric study on the aerodynamic drag of ultra high-speed train in evacuated tube - part 2, Journal of the Korean Society for Railway, 13(1), pp. 51-57.
  4. Hyundai-Rotem (2011) Test procedure of next generation EMU.
  5. H.B. Kwon, J.H. Kwak (2007) A study on the improvement of nose shape of KTX-II train using CFD technique, Proceedings of KASA fall Conference (1), Jeju, pp. 156-160.
  6. H.B. Kwon, S.H. Yun, H.W. Lee (2011) Target and implementation of aerodynamic drag reduction for high-speed train to reach up to 500km/h running speed, Proceeding of KSR fall Conference, Jeju, pp. 1320-1326.

피인용 문헌

  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