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Study of Aerodynamic Noise induced by Shock Waves in Supersonic Flows and Development of a Method for Reducing the Noise

Research Project

Project/Area Number 11650177
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, Faculty of Engineering Sciences, Associate Professor, 大学院・総合理工学研究院, 助教授 (20150922)

Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2000: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsHigh Speed Train / Tunnel / Noise Reduction / Ballast Track / Pressure Wave / Micro-Pressure Wave / Porous Material / Boundary Layer
Research Abstract

1. To accomplish the railway tunnel simulator, a fast opening gate valve was developed. we analyzed the performance of the fast opening gate valve by using a super high-speed video camera. The results show that the opening time of the gate valve decreases when the initial pressure in the actuating chamber increases. And the relation between the initial pressure in the actuating chamber and the characteristics of the compression wave such as the maximum pressure gradient was made clear.
2. To study the ballast effect on distortion of pressure wave propagating in high-speed railway tunnel, we made a high-speed railway tunnel simulator using a fast opening gate valve. An experimental investigation was carried out to clarify the distortion of a propagating compression wave in a model tunnel with various porous material wall. Experimental data shows the possibility of the present alleviative method, and the effects of the porous material wall is clear.
3. The compression waveform in the propagating process are studied numerically by second-order symmetric TVD method scheme, taking both fluid friction on the flat wall and the effect of the ballasted track into consideration. The waveform of the compression wave in the tunnel calculated by the present two-layer method is in good agreement with that of the field test data on both track tunnels, so that the present numerical method of calculation seems to be reasonable.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] 仲尾晋一郎 他4名: "トンネル波動シミュレーター用急速開口弁の試作と性能"可視化情報. 19・s2. 263-266 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 松尾一泰,青木俊之: "新幹線トンネルの低周波音"騒音制御. 23・5. 339-343 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Aoki, 他2名: "Ballast effect on distortion of propagating compression wave in high-speed railway tunnel"Proc.22nd Int.Symp.on Shock Waves. 1. 1-6 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Aoki,K.Matsuo: "Impuse sound emitted from high-speed raiway tunnel exit"Proc.6th AIAA/CEAS Aeroacoustics Conference. 1. 1-6 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 青木俊之 他2名: "管開口端からの圧力波の放出により発生するパルス音"可視化情報. 20・s1. 447-450 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shinichoro Nakao, et.al.: "The performance of a fast-opening gate valve for a railway tunnel simulator"Journal of the Visualization Society of Japan. 19-s2. 263-266 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kazuyasu Matsuo and Toshiyuki Aoki: "Low Frequency Sound Generated from Shinkansen Railway Tunnels"Journal of INCE/J. 23-5. 339-343 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Toshiyuki Aoki, et.al.: "Ballast effect on distortion of propagating compression wave in high-speed railway tunnel"Proc. 22nd Int.Symp. on Shock Waves. 1. 1-6 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Toshiyuki Aoki and Kazuyasu Matsuo: "Impulse sound emitted from high-speed railway tunnel exit"Proc. 6th AIAA/CEAS Aeroacoustics Conference. 1. 1-6 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Toshiyuki Aoki, et.al.: "Impulsive Sound Caused by Discharging Pressure Wave from an Open End of a Tube"Journal of the Visualization Society of Japan. 20-s1. 447-450 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Aoki, 他2名: "Ballast effect on distortion of propagating compression wave in high-speed railway tunnel"Proc.22nd Int.Symp.on Shock Waves. 1. 1-6 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Aoki,K.Matsuo: "Impuse sound emitted from high-speed raiway tunnel exit"Proc.6th AIAA/CEAS Aeroacoustics Conference. 1. 1-6 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 青木俊之 他2名: "管開口端からの圧力波の放出により発生するパルス音"可視化情報. 20-s1. 447-451 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 仲尾晋一郎,ほか4名: "トンネル波動シミュレーター用急速開口弁の試作と性能"可視化情報. 19・S2. 263-266 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 松尾一泰,青木俊之: "新幹線トンネルの低周波音"騒音制御. 23・5. 339-343 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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