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2012 Fiscal Year Final Research Report

Explortion of the linear disturbance modes in a wall-bounded turbulent shear flow and bridging the gap between their structures and the turbulent statistics

Research Project

  • PDF
Project/Area Number 22560161
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

MATSUBARA Masaharu  信州大学, 工学部, 准教授 (10324229)

Project Period (FY) 2010 – 2012
Keywords乱流
Research Abstract

In this study, artificial pulse jet disturbance from to a wall surface is introduced to a flat-plate turbulent boundary layer using a small speaker and development of the disturbancewas investigated using hot wire anemometry. The velocity signals were ensemble-averaged with phase of the initial disturbance. This averaging enables extraction of disturbance components related to the artificial disturbance. The result shows that their disturbance structure does not depend on strength of the initial disturbance and that amplitude of these disturbances are proportional to that of the initial disturbance. This is evidence that there exist linear disturbances in a turbulent boundary layer. This linear disturbance would be greatly utilized in analysis and prediction of turbulence statistics in not only the turbulent jet but also wide-ranging turbulent shear flows.

  • Research Products

    (8 results)

All 2013 2012 2011 2010

All Presentation (8 results)

  • [Presentation] 平板乱流境界層内での線形撹乱の構造について2013

    • Author(s)
      松本幸之輔,長崎将成,松原雅春
    • Organizer
      日本機械学会北陸信越支部第50期総会・講演会
    • Place of Presentation
      福井
    • Year and Date
      2013-03-09
  • [Presentation] Influence of tripping on spatiotemporal correlation between velocity and wall pressure in a turbulent boundary layer2012

    • Author(s)
      Masaharu Matsubara, Yasuyuki Sendai, Konosuke Matsumoto and Taiki Mishiba
    • Organizer
      iTi CONFERENCE ON TURBULENCE V
    • Place of Presentation
      Bertinoro, Italy
    • Year and Date
      2012-10-02
  • [Presentation] Experimental Study of Linear Disturbance in a Turbulent Boundary Layer2012

    • Author(s)
      Konosuke Matsumoto, Taiki Mishiba, Yasuyuki Sendai and Masaharu Matsubara
    • Organizer
      Ninth International Conference on Flow Dynamics
    • Place of Presentation
      Sendai
    • Year and Date
      2012-09-20
  • [Presentation] Linear Disturbance Excited by a Finite Initial Disturbance in a Turbulent Boundary Layer2011

    • Author(s)
      Kounosuke Matsumoto, YasuyukiSendai, Taiki Mishiba, Masaharu Matsubara
    • Organizer
      Eighth International Conference on Flow Dynamics
    • Place of Presentation
      Sendai
    • Year and Date
      2011-11-10
  • [Presentation] 乱流境界層における壁からのパルス噴流により励起された撹乱の成長と線形性について2011

    • Author(s)
      松本幸之輔,松原雅春
    • Organizer
      日本流体力学会学会年会2011
    • Place of Presentation
      東京・八王子
    • Year and Date
      2011-09-08
  • [Presentation] 周期パルス加熱式熱線を用いた乱流測境界層計測2011

    • Author(s)
      三柴大輝, 仙台康之, 松本幸之輔,松原雅春
    • Organizer
      日本流体力学会学会年会2011
    • Place of Presentation
      東京・八王子
    • Year and Date
      2011-09-07
  • [Presentation] Influence of Tripping on Spatiotemporal Correlation Between Velocity and Wall Pressure in a Turbulent Boundary Layer2011

    • Author(s)
      Yasuyuki Sendai, Masaharu Matsubara
    • Organizer
      Seventh International Symposium on Turbulence and Shear Flow Phenomema
    • Place of Presentation
      Ottawa, Canada
    • Year and Date
      2011-07-29
  • [Presentation] 平板乱流境界層におけるトリッピングの影響2010

    • Author(s)
      仙台康之,松本幸之輔,松原雅春
    • Organizer
      日本流体力学会年会2010
    • Place of Presentation
      札幌
    • Year and Date
      2010-09-09

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Published: 2014-08-29  

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