• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

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

Research Project

Project/Area Number 09450080
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

MATSUO Kazuyasu  Kyushu University, Interdisciplinary Graduate School of Engineering Sciences, Professor, 大学院・総合理工学研究科, 教授 (30037759)

Co-Investigator(Kenkyū-buntansha) HANDA Taro  Kyushu University, Interdisciplinary Graduate School of Engineering Sciences, Assistant, 大学院・総合理工学研究科, 助手 (30284566)
MIYAZATO Yoshiaki  Kyushu University, Interdisciplinary Graduate School of Engineering Sciences, Assistant Professor, 大学院・総合理工学研究科, 助教授 (30253537)
AOKI Toshiyuki  Kyushu University, Interdisciplinary 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) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 1999: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 1998: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 1997: ¥5,200,000 (Direct Cost: ¥5,200,000)
Keywordsshock wave / supersonic flow / aerodynamic noise / supersonic jet / supersonic nozzle
Research Abstract

1. The oscillations of the normal shock waves in supersonic nozzles and supersonic diffusers were investigated using a supersonic wind tunnels, and a strong correlation were found among the shock oscillation, the static pressure fluctuation on the wall, and the generated aerodynamic noise.
2. Small pressure disturbances which are generated and propagated upstream from downstream portion of the shock wave were observed, and it was found that these disturbances induce the shock oscillation. At the downstream portion, the boundary layer behaves unsteadily and violently. Also, vortices generated by the shock oscillation were observed to be convected downstream. Based on these results, the shock oscillation was explained to be sustained by the upstream-propagating disturbances and the downstream-convected vortices.
3. The response of a normal shock wave to a white small pressure disturbance having the same power spectral density in the supersonic diffuses was analyzed, and it was shown that the shock displacement spectral density distributions obtained by the analysis agree very well with those measured in the present and previous experimental data.
4. Theoretical and experimental investigations were performed on the structures of correctly-expanded and under-expanded supersonic laminar and turbulent jets, and the distributions of the Pivot impact pressure and flow turbulence in the jets, the length of the potential core, the condition of the generation of shock waves and their locations in the jets were made clear.
5. The flow mechanism on the distributions of the Pitot impact pressure along the center line of the jet was well explained, and the correlation between the aerodynamic noise level and the correctly and under expanded supersonic jets.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 樫谷 賢士: "軸対称ノズルからの適正膨張超音速層流噴流の構造"日本機械学会論文集. 63・616. 3905-3912 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masashi Kashitani: "Numerical and experimental investigations of supersonic jets from sootblower nozzles"JSMA International Journal. 41・2. 375-380 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 片野田 洋: "軸対称超音速自由噴流の数値シミュレーション"九州大学総合理工学研究科報告. 20・1. 13 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Taro Handa: "Fine structure on shock oscillation in supersonic nozzle"Proc. of 4th KSME-JSMA Fluid Eng. Conf.. 445-448 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 則松 康文: "スートブロア用超音速ノズル噴流の可視化計測とピトー圧分布"九州大学総合理工学研究科報告. 21・3. 289-294 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masashi Kashitani, et.al.: "Structure of a Correctly Expanded Supersonic Laminar get from Axisymmetric Nozzles"Transactions of the Japan Society of Mechanical Engineers. 63-616. 3905-3912 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Masashi Kashitani, et.al.: "Numerical and Experimental Investigations of Supersonic Jets from Sootblower Nozzle"JSME International Journal. 41-2. 375-380 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hiroshi Katanoda, et.sl.: "Numerical Simulation of Axisymmetric Supersonic"Engineering Science Report, Kyushu University. 20-1. 13-18 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Taro Handa, et.al.: "Fine Structure on Shock Oscillation in Supersonic Nozzle"Proceedings of the KSME-JSME Fluids Engineering Conference. 445-448 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Yasufumi Norimatsu, et.al.: "Visualization and Pitot Pressure Measurements of Supersonic Jets for Sootblowers"Engineering Sciences Report, Kyushu University. 21-3. 289-294 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 樫谷 賢士: "軸対称ノズルからの適正膨張超音速層流噴流の構造"日本機会学会論文集. 63・616. 3905-3912 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Masashi kashitani: "Numerical and experimental investigations of supersonic jets from cootblower nozzles"JSME International Joumal. 41・2. 375-380 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 片野田 洋: "軸対称超音速自由噴流の数値シュミレーション"九州大学総合理工学研究科報告. 20・1. 13-18 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Taro Handa: "Fine structure on shock oscillation in supersonic nozzle"Proc,of 4th KESM-JSME Fiuid Eng,Conf.. 445-448 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] 則松 康文: "スートブロア用超音速ノズル噴流の可視化計測とピトー圧分布"九州大学総合理工学研究科報告. 21・3. 289-294 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 片野田 洋: "不足膨張超音速自由噴流の可視化と数値シミュレーション" 可視化情報. 17・2. 85-86 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] 樫谷 賢士: "軸対称ノズルからの適性膨張超音速層流噴流の構造" 日本機械学会論文集. 63・616. 3905-3912 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Masashi Kashitani: "Numerical and experimental invsetigations of supersonic jets from sootblower nozzles" JSME International Journal. 41・2. 375-380 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 片野田 洋: "軸対称超音速自由噴流の数値シミュレーション" 九州大学総合理工学研究科報告. 20・1. 13-18 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Taro Handa: "Fine structure on shock oscillation in supersonic nozzle" Proc.of 4th KSME-JSME Fluid Eng.Conf.445-448 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 片野田 洋: "不足膨張音速自由噴流の可視化と数値シミュレーション" 可視化情報. 17・2. 85-86 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 樫谷 賢士: "軸対称ノズルからの適正膨張超音速層流噴流の構造" 日本機械学会論文集. 63・616. 3905-3912 (1997)

    • Related Report
      1997 Annual Research Report

URL: 

Published: 1997-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi