Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
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Parametric Study on the Aerodynamic Drag of Ultra High-speed Train in Evacuated Tube - Part 1

진공튜브 내 초고속열차의 공기저항 파라메타 연구 - 1

  • 권혁빈 (한국철도기술연구원 초고속열차연구실) ;
  • 강부병 (한국철도기술연구원 초고속열차연구실) ;
  • 김병윤 ((주)넥스트이엔에스, 중공업/건설그룹) ;
  • 이두환 ((주)넥스트이엔에스, 중공업/건설그룹) ;
  • 정현주 ((주)넥스트이엔에스, 중공업/건설그룹)
  • Published : 2010.02.26
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Abstract

This study is devoted to understand the basic characteristics of the flowfield around a train in evacuated tube and to suggest an efficient numerical method to calculate the flowfield. To get steady-state solution in minimum calculation domain, various boundary condition have been tried for steady calculation and have been compared to the solution of unsteady calculation. At the train velocity of 300km/h, the aerodynamic drag results of both calculation method agreed very well. The drag ratio between on the open filed and in the tube from the calculation result by the suggested numerical method lied in the same fitting curve with that from the filed test of high-speed trains running in the line.

본 연구에서는 튜브-열차 시스템의 기본적인 유동장의 특성을 파악하고, 튜브열차의 공기저항을 계산할 수 있는 보다 효율적인 수치 해법을 제시하고 계산 결과에 대한 타당성을 논하였다. 최소한의 계산 영역 내에선 정상상태의 해를 찾기 위하여 비정상 해석의 결과를 기준으로 하여 경계조건의 부여 방법을 변화시킨 정상 해석의 결과를 비교한 결과, 열차속도가 300 km/h일 경우에는 공기저항의 값이 정상해석 결과와 비정상해석 결과가 잘 일치하였으며, 동일 속도 대역에서의 고속열차 현장시험 결과와 비교한 결과 열차/터널 단면적비에 따라 공기저항의 비가 동일한 추세를 나타나는 것으로 나타났다.

Keywords

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