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2006 Fiscal Year Final Research Report Summary

Turbulent Boundary Layer Control by Plasma Synthetic Jet Actuator aiming Engineering Application

Research Project

Project/Area Number 17360107
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Dynamics/Control
Research InstitutionYamaguchi University

Principal Investigator

OGAWARA Kakuji  Yamaguchi University, Dept.of Science and Engineering, Professor, 大学院理工学研究科, 教授 (70211125)

Co-Investigator(Kenkyū-buntansha) MOCHIZUKI Shinsuke  Yamaguchi University, Dept.of Science and Engineering, Professor, 大学院理工学研究科, 教授 (70190957)
Project Period (FY) 2005 – 2006
KeywordsFluid Dynamics / Aero Space Engineering / Control Theory / Instrumentation / Micro Machine
Research Abstract

Several Plasma Synthetic Jet Actuators (PSJA) were made and tested to examine flow induction characteristics affected by their geometry. We found that optimal width ratio of Anode and Cathode exists in order to maximize the flow velocity induced by the actuator. Effects of PSJA on plane turbulent boundary layer were measured by Direct Shear Stress Sensor and Hot-wire Anemonetry in low speed and low turburence wind tunnel. As results, we proved that PSJA reduces shear stress at the downstream of the actuator. This shear stress reduction phenomenon is measured directly at the first time in this study, and is significant for engineering applications. However, the shear stress reduction effects observed only in the vicinity of the actuator. Shear stress was increased as goes downstream from the actuator.
Computational Fluid Dynamics (CFD) studies conducted to investigate the flow fields induced by the PSJA. Compressible flow analysis considering dielectric body force clearly showed how PSJA … More induces jet flow. And we also found that vacuum dielectric coefficient can be used to simulate induced flow in sufficient quantitative accuracy.
Closed loop feedback control was tested in order to improve the effectivity of the flow separation control on NACA012 airfoil. Delayed feedback control (DFC) method, using hotwire as a downstream sensor, was chosen because of its robustness to the control parameters. We found that DFC can reduce the power consumption needed to activate PSJA in half as compared to open loop control.
Image Thermograph measurements were conducted to know how PSJA induces heat along with flow. In this study, glow discharge was generated using high voltage transformer and audio power amplifier. Because of significant phase shift between anode voltage and current, efficiency of the PSJA was not in satisfactory condition, in the sense that small portion of supplied electrical power as transformed into fluid flow. Temperature at downstream of PSJA often raised by 30 degree Celsius.
Relative humidity effects also investigated in small channel using mass flow meter. The height of the channel was set to several times higher than the PSJA height. In conclusion, mass flow induced by PSJA tends to be decreased as relative humidity increases.
We are planning to develop micro pumps and swirlers using PSJA. Less

  • Research Products

    (13 results)

All 2007 2006

All Journal Article (12 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] プラズマシンセティックジェットアクチュエータのPWM制御による翼周り流れ制御2007

    • Author(s)
      小河原加久治, 他3名
    • Journal Title

      日本機械学会論文集B編 72・724

      Pages: 3030-3036

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of DFC Parameter on Flow Control Around Wings with PSJA2007

    • Author(s)
      M.Ohishi, 他4名
    • Journal Title

      AIAA Paper 45th AIAA Aerospace Sciences Meeting and Exhibit 2007-110(CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] PWM Control of Flow and an Airfoil Using Plasma Synthetic Jet Actuator2007

    • Author(s)
      K.Ogawara
    • Journal Title

      Transaction of Japan Society of Mechanical Engineers Ser.B vol.72, No.724

      Pages: 3030-3036

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of DFC Parameter on Flow Control Around Wings with PSJA2007

    • Author(s)
      M.Ohishi
    • Journal Title

      45th AIAA Aerospace Sciences Meeting and Exhibit AIAA Paper 2007-110

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 流路内でのプラズマシンセティックジェットアクチュエータの流れ制御特性2006

    • Author(s)
      小河原加久治, 他1名
    • Journal Title

      日本機械学会論文集B編 72・717

      Pages: 1214-1219

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Direct Measurement of Wall-Shear Stress of Plane Shear Layer with Plasma Synthetic Jet Actuator2006

    • Author(s)
      K.Ogawara, 他2名
    • Journal Title

      ICAS-2006 3.5S(CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Delayed Feedback Control for Flow around Wing using Plasma Synthetic Jet Actuator2006

    • Author(s)
      K.Ogawara 他3名
    • Journal Title

      AIAA-Paper N0. 2006-1406 44th AIAA Aerospace Sciences Meeting and Exhibit 2006-1406(CD-ROM)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] スピーカー型シンセティックジェットによる浮き上がり火炎の能動制御2006

    • Author(s)
      小河原加久治 他4名
    • Journal Title

      日本機械学会論文集 B編 72・715

      Pages: 901-908

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Flow Control Characteristics of Plasma Synthetic Jet Actuator in Channel2006

    • Author(s)
      K.Ogawara
    • Journal Title

      Transaction of Japan Society of Mechanical Engineers Ser.B vol.72, No.717

      Pages: 1214-1219

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Active Control for Lifted Flame using a Speaker-Driven Synthetic Jet2006

    • Author(s)
      K.Ogawara
    • Journal Title

      Transaction of Japan Society of Mechanical Engineers Ser.B vol.72, No.715

      Pages: 901-907

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Direct Measurement of Wall-Shear Stress of Plane Shear Layer with Plasma Synthetic Jet Actuator2006

    • Author(s)
      K.Ogawara
    • Journal Title

      ICAS-2006 3.5s

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Delayed Feedback Control for Flow around Wing using Plasma Synthetic Jet Actuator2006

    • Author(s)
      K.Ogawara
    • Journal Title

      44th AIAA Aerospace Sciences Meeting and Exhibit AIAA-Paper No.2006-1406

    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] 機械的稼動部を持たない旋回流発生装置2007

    • Inventor(s)
      小河原加久治
    • Industrial Property Rights Holder
      山口大学
    • Industrial Property Number
      特願2007-69991
    • Filing Date
      2007-03-19
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2008-05-27  

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