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3-Dimensional Structure of Eddy in Free Turbulence Flow

Research Project

Project/Area Number 61550710
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 化学工学
Research InstitutionKyushu Institute of Technology

Principal Investigator

YUU Shinichi  Faculty of Engineering, Kyushu Institute of Technology, 工学部, 教授 (30026215)

Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1987: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1986: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsDeveloping Turbulence / Large Scale Vortices / Free Jet / Velocity Vector Diagram / 2点間速度相関 / 自由乱流 / 乱流の遷移 / 渦の合一 / 大規模流れの干渉
Research Abstract

A series of measurements was made simultaneously by using arrays of hot-wire anemometers with X-probes. The data show the rows consisted of doughnut-type large-scale vortices and their frequent pairing which results in larger vortices. The interaction of these vortices beyond the jet centrline breaks the doughnut-type large-scale vortices and forms three-dimensional medium and small-sized vortices. The flow is randomized through this process. Some large scale vortices continue to pair and form the configuration of counter-rotating vortices approximately alternating on opposite sides of the jet centerline in the region far from the nozzle.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] 湯晋一: 日本機機学会論文集B編. 54. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinichi Yuu: "Developing Process of Turbulence in a Round Nozzle Air Jet" 54. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinichi Yuu;Akinori Toyoda: Physics of Fluids. 31. (1988)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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