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Research on Aeroacoustic Control using Direct Numerical Simulation.

Research Project

Project/Area Number 07455085
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionOsaka University

Principal Investigator

MIYAKE Yutaka  Faculty of Eng., Osaka University, Professor, 工学部, 教授 (50029005)

Co-Investigator(Kenkyū-buntansha) BANDO Kiyoshi  Faculty of Eng., Kansai Univ., Asst.Professor, 工学部, 助教授 (70156545)
OHTA Takashi  Faculty of Eng., Osaka University, Asst.Research., 工学部, 助手 (10273583)
TSUJIMOTO Koichi  Faculty of Eng., Osaka University, Asst.Research., 工学部, 助手 (10243180)
KAJISHIMA Takeo  Faculty of Eng., Osaka University, Asst.Professor, 工学部, 助教授 (30185772)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1996: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1995: ¥3,200,000 (Direct Cost: ¥3,200,000)
KeywordsDNS / Aeroacoustics / Turbulence / Round Jet / Turbulence Control / Wing / Aeroacoutics / LES / DNS / Round-Jet / Wing / Vortex
Research Abstract

To establish a technique for the reduction of aerodynamic noise, we investigated a cooperative analysis of flow and sound fields to predict the effect of flow control on the acoustic field. The difficulty is caused by the facts that these two fields have significantly different scales and that the acoustic pressure is some order of magnitude less than that of flow field. In this project, the following approach has been developed. First, the unsteady incompressible Navier-Stokes equations are solved by the Direct Numerical Simulation (DNS) or Large-eddy Simulation (LES) technique to obtain the sound source. Next, the acoustic component is separated from the flow field using the method of Hardin and Pope in the interfacial field. The far-filed sound-pressure is then calculated based on the acoustically approximated equation. The flow fields considered are turbulent round jet and the unsteady flow around a blade. The accuracy for reproducing the sound source by DNS and LES has been improved by introducing the higher-order and consistent finite-difference method. For the acoustic field, the application of the Hardin-Pose's method on the curvilinear coordinate system with higher-order accuracy has been developed. In addition, the mechanism of quasi-streamwise vortices near a flat plate and a numerical experiment of their control were carried out by the DNS.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] 三宅 裕: "壁近傍の縦渦の数値シミュレーション" 日本流体力学会誌. 14. 418-426 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 三宅 裕: "壁近傍の縦渦の再生について" 日本機械学会論文集B編. 1272-1278 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Ohnishi, T.: "Pseduo-Compressiblity Method Applied for the Flow around a 2D Thin Airfoil for Air-Conditioner" ASME-FED. 215. 97-104 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miake, Y.: "On the Mechanism of Attenuation of Turbulence by Spanwise Wall Oscillation" Proc. 2nd ERCOFTAC Workshop on DNS and LES, Grenoble. 2. F. 3.1-F. 3.2 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 三宅 裕: "壁近傍乱流の縦渦の維持・再生機構" 日本機械学会論文集B編. 62・598. 2172-2179 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miyake, Y: "Numerical Simulation of Quasi-Streamwise Eddies in the Near-Wall Region" J.Japan Soc.Fluid Mech.14. 418-426 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miyake, Y,et.al: "On Regeneration of Quasi-Streamwise Vortices of Near-Wall Turbulence" Trans.JSME., serB. 61・584. 1272-1278 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Ohnishi, T., et.al: "Pseduo-Compressiblity Method Applied for the Flow around a 2D Thin Airfoil for Air-Conditioner" ASME-FED. 215. 97-104 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Miyake, Y., et.al: "On the Mechanism of Attenuation of Turbulence by Spanwise Wall Oscillation" Proc.2nd ERCOFTAC Workshop on DNS and LES,Grenoble. 2. F.3.1-F.3.2 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] MIYAKE,Y., et.al: "Mechanism of Self-Sustenance and Regeneration of Quasi-Streamwise Vortices of Near-Wall Turbulence" Trans.JSME., ser B. 62・598. 2172-2179 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 三宅 裕: "壁近傍乱流の縦渦の維持・再生機構" 日本機械学会論文集 B編. 62-598. 2172-2179 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 三宅 裕: "On the Mechanism of Attenuation of Turbulence by Spanwise Wall Oscillation" Proc.2nd ERCOFTAC Workshop on Direct and Large Eddy Simulation. F.3.1-F.3.2 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 三宅 裕: "溝乱流場での縦渦群の挙動の解析" 日本流体力学会 '96年会講演論文集. 285-286 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 三宅 裕: "壁の面内振動による壁乱流の抵抗低減機構" 日本機械学会論文集 B編. 63-605. 16-23 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 三宅 裕: "縦渦群の同定と挙動に関する数値シミュレーション" 第12回NSTシンポジウム講演論文集. 19-26 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 青木 誠司: "円形ノズルからの乱流噴流の空間発展直接シミュレーション" 日本機械学会講演論文集. 974-1. (発表予定) (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 片岡浩之,三宅裕,辻本公一: "単独翼のまわりの音のDNS" 関西支部第71期定時総会講演会講演論文集. (発表予定). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 梶島岳夫: "平板間乱流のDNSの精度と渦の再現性" 第27回乱流シンポジウム講演論文集. 27-30 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 梶島岳夫,太田貴士,三宅裕: "高次中心差分法による乱流の直接シミュレーション-格子系・差分形式の検討と一般曲線座標系への拡張-" 第9回数値流体力学シンポジウム講演論文集. 161-162 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 梶島岳夫,永翁龍一,三宅裕: "平行平板間乱流のLES" 第11回東大生研NSTシンポジウム講演論文集. 207-210 (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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