Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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A comparative study of field measurements of the pressure wave with analytical aerodynamic model for the high speed train in tunnels

고속철도 터널내 압력파 측정과 공기압 해석모델에 대한 기초연구

  • Received : 2015.04.17
  • Accepted : 2015.04.30
  • Published : 2015.05.31
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Abstract

The pressure wave formed by the piston effects of the train proceeds within the tunnel when a train enters the tunnel with a high speed. Depending on the condition of tunnel exit, the compression waves reflect at a open end, change to the expansion waves, transfer to tunnel entrance back. Due to interference in the pressure waves and running train, passengers experience severe pressure fluctuations. And these pressure waves result in energy loss, noise, vibration, as well as in the passengers' ears. In this study, we performed comparison between numerical analysis and field experiments about the characteristics of the pressure waves transport in tunnel that appears when the train enter a tunnel and the variation of pressure penetrating into the train staterooms according to blockage ratio of train. In addition, a comparative study was carried out with the ThermoTun program to examine the applicability of the compressible 1-D model(based on the Method of Characteristics). Furthermore examination for the adequacy of the governing equations analysis based on compressible 1-D numerical model by Baron was examined.

열차가 고속으로 터널내를 진입할 때 열차의 피스톤 작용에 의해 형성되는 압력파는 터널내를 진행하고, 출구에 도달한 압축파는 터널 출구면의 개구단 조건에 따라 팽창파로 터널입구로 다시 전파된다. 이에 따른 터널내 주행열차와의 간섭현상으로 인해 차량내 승객은 심한 압력변동을 느끼게 되며, 이러한 압력파는 열차의 설계와 운행에 영향을 미치고, 에너지 손실과 소음, 진동, 승객의 이명현상의 원인이 된다. 본 연구에서는 열차가 고속으로 터널내부를 진입시 나타나는 터널내 압력파의 전파특성과 열차의 기밀도에 따른 객실내로 침투하는 압력 변화량을 현장 실험내용과 비교분석을 수행하였다. 또한, 압축성 1-D 모델(MOC)의 적용 가능성을 살펴보기 위해 ThermoTun 프로그램과의 비교연구를 수행하였고, Baron의 압축성 1-D 수치모델에 기초한 지배방정식 해석의 적정성을 검토하기 위해 비교연구도 병행하였다.

Keywords

References

  1. Anderson (2011), Fundamentals of aerodynamics, 5th Edition, McGraw-Hill, pp. 572-575.
  2. Baron, A., Molteni, P., Viegevano, L. (2006), "High-speed trains: Prediction of micro-pressure wave radiation from tunnel portals", Journal of Sound and Vibration, No. 296, pp. 59-72.
  3. Choi, J.K., Jeong, S.M., Kim, K.H. (2013), "Pressure change inside the train according to an increase in speed of the train travelling in tunnels", Conference of THE KOREAN SOCIETY FOR RAILWAY, KSR2013A130.
  4. Hara, T. (1960), "Aerodynamic problems when train is running into tunnel with large velocity", Railway Technical Research Report(In Japanese), No. 153(12), pp. 1-20.
  5. Hong, S.W., Yun, S.H., Cho, T.H., Kwon H.B. (2014), "Study on the required Air-tightness performance of passenger train operated in the a line of GTX network", Conference of THE KOREAN SOCIETY FOR RAILWAY, KSR2014A387.
  6. Howe, M.S. (1998), "Mach number dependence of the compression wave generated by a highspeed train entering a tunnel", Journal of Sound and Vibration, No. 212(1), pp. 23-36. https://doi.org/10.1006/jsvi.1997.1348
  7. International Union of Railways (2005), "Determination of railway tunnel cross-sectional areas on the basis of aerodynamic considerations", International Union of Railways (UIC), 2nd edition, pp. 11-16.
  8. Kaoua, J.N., Pope, C.W., Henson, D.A. (2006), "A parametric study into the factors affecting the development and alleviation of micro-pressure waves in railway tunnels", 12th AVVT, pp. 789-804.
  9. Miyachi, T., Ozawa, S., Fukuda, T., Iida, M., Arai, T. (2011), "A new simple equation governing distortion of compression wave propagating through shinkansen tunnel with slab tracks", Japan Society of Mechanical Engineers, Vol. 79, No. 785, pp. 60-73.
  10. Oh, H.J., Shin, D.Y., Lee, S.G., Kim, D.H. (2012), "Numerical study of pressure wave in underground station with vent shaft position", Conference of THE KOREAN OF COMPUTATIONAL FLUIDS ENGINEERING, No. 11, pp. 306-313
  11. Ozawa, S. (1979), "Studies of micro-pressure wave radiated from a tunnel exit", Railway Technical Research Report(In Japanese), No. 1121(7), pp. 1-92.
  12. Palmero, N.M., Vardy, A. (2014), "Tunnel gradients and aural health criterion for train passengers, proceedings of the institution of mechanical engineers part F-journal of rail and rapid transit", No. 228(7), pp. 821-832. https://doi.org/10.1177/0954409713490684
  13. Sibilla, S., Baron, A., Mossi, M. (2001), "The alleviation of the aerodynamics drag and wave effects of high-speed trains in very long tunnels", Journal of Wind Engineering and Industrial Aerodynamics, No. 89, pp. 365-401.
  14. Tollmien, W. (1927), "Der luftwiderstand und druckverlauf bei der fahrt von zugen in einem tunnel", VDI-Zeitschrift Vol. 71, pp. 199-203.
  15. Vardy, A., Brown, J. (2002), "An overview of wave propagation in tunnels", TRANSAERO - A European Initiative on Transient Aerodynamics for Railway System Optimisation, Notes on Numerical Fluid Mechanics, Vol. 79, pp. 249-266. https://doi.org/10.1007/978-3-540-45854-8_21
  16. Yamamoto, A. (1983), "Aerodynamics of train and tunnel", Railway Technical Research Report(In Japanese), No. 1230(3), pp. 1-70.

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