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1996 Fiscal Year Final Research Report Summary

Study of Aerodynamic Drag/Pressure Transients Induced by High-Speed Train Passing in a Tunnel

Research Project

Project/Area Number 07650211
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

AOKI Toshiyuki  Kyushu University, Graduate School of Engineering Sciences, Associate Professor, 大学院・総合理工学研究科, 助教授 (20150922)

Project Period (FY) 1995 – 1996
KeywordsHigh Speed Train / Tunnel / Choking phenomenon / Pressure Transients / Compression Wave / Boundary Layr / Unsteady Flow / Pressure Wave
Research Abstract

1.The first project was carried out to develop an open-ended shock tube with a fast opening gate valve instead of a diaphragm. The results show that the opening of a gate valve decreases with an increasing the initial pressure of the actuating chamber.
2.The strength, maximum rate of pressure rise and length of wavefront are strongly dependent on the initial pressue of the actuating chamber and the opening speed of a gate valve.
3.The second project was carried out to investigate experimentally the transition of unsteady boundary layr. The experimental data were compared with the theoretical results for a weak shock wave.
4.It was found that the laminar-to-turbulent transition in unsteady boundary layr flow, which describes the density profiles at strength of the initial compression wave from 9 kPa, exists.
5.The final project was carried out to investigate experimentally and numerically the pressure transients in the high-speed train/tunnel systems and the formation mechanism of pressure transients. The experimental data were compared with the numerical results by the characteristic method and TVD differential method.
6.It was shown that the strength of the pressure transients are strongly dependent on the velocity of each train and the the formation mechanism of pressure transients is clarified.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 青木俊之: "高速列車のトンネル内すれ違い時に生じる圧力変動" 可視化情報. 15. 31-34 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 眞下伸也: "高速鉄道トンネル内を伝ぱする圧縮波の減衰と変形" 日本機械学会論文集B編. 62・596. 169-176 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Kashimura: "Emission of a Propagating Compression Wave from an Open End of a Tube" JSME International Journal,Series B. 39・3. 475-481 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Matsuo: "Numerical study of attenuation and distortion of a compression wave propagating in a high-speed railway tunnel" Proc.of the 5th Int.Symp.on Computers and Railways. 2. 23-32 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Aoki: "Transition of unsteady boundary layer induced by propagating compression wave" Proc.of the 20th Int.Symp.on Shock Waves. 1. 723-728 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] AOKI,T., MASHIMO,S., FUNASAKI,K., and MATSUO,K.: "Pressure Transients Induced by High-Speed Trains Passing Each Other Inside a Tunnel" Journal of The Visualization Society of Japan. 15-52. 31-34 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] MASHIMO,S., NAKATSU,E., AOKI,T., and MATSUO,K.: "Attenuation and Distortion of a Compression Wave Propagating in a High-Speed Railway Tunnel" Transactions of the Japan Society of mechanical Engineers. 62-597. 169-176 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] KASHIMURA,H., YASUNOBU,T., AOKI,T., and MATSUO,K.: "Emission of a Propagating Compression Wave from an Open End of a Tube" JSME International Journal B. 39-3. 475-481 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] MATSUO,K., AOKI,T., KASHIMURA,H., MASHIMO,S., and NAKAO,S.: "Numerical Study of Attenuation and Distortion of a Compression Wave Propagating in a High-Speed Railway Tunnel" Proc.of the 5th Int.Symp.on Computers and Railways. 2. 23-32 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] AOKI,T., KONDOH,N., MATSUO,K., and MASHIMO,S.: "Transition of Unsteady Boundary Layr Induced by Propagating Compression Wave" Proc.of the 20th Int.Symp.on shock Waves. 1. 723-728 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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