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Real Time Instrumentation of Unsteady Flow Phenomena based upon Color Image Information

Research Project

Project/Area Number 61490023
Research Category

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

Allocation TypeSingle-year Grants
Research Field 広領域
Research InstitutionKobe University

Principal Investigator

TAKAMORI Toshi  Professor, Faculty of Engineering, Kobe University, 工学部, 教授 (10031098)

Co-Investigator(Kenkyū-buntansha) YAMASAKI Yoshiharu  Research Assistant, Faculty of Negineering, Kobe University, 工学部, 教務職員 (90174648)
TADOKORO Satoshi  Research Associate, Faculty of Engineering, Kobe University, 工学部, 助手 (40171730)
KIMURA Ichiro  Associate Professor, Faculty of Engineering, Kobe University, 工学部, 助教授 (60031134)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1987: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1986: ¥3,900,000 (Direct Cost: ¥3,900,000)
KeywordsColor image processing / Flow visualization / Velocity vecotr distribution / Simultaneous measurement / Liquid crystal / 温度計測 / 感温液晶粒子懸濁法 / トレーサ粒子注入法 / 非定常流 / 相互相関法 / 圧力分布 / 乱れ強さ分布
Research Abstract

The original purposes of this study were to improve the accuracy of flow velocity measurement and to obtain a potential field by Moire method and a velocity vector field by a tracer method at the same time by using color image information. On the latter purpose, however, it was turned out that the visualization method for measuring the above two quantities at the same time was technically difficult on investigation. Therefore, we directed our attention to a free convection in which the temperature and flow fields coexist. The two fields were visualized by using the liquid crystal tracer. From the visualized color images, simultaneous measurements of the velocity vector and temperature distributions were completed. Furthermore, the image processing instrumentation system of velocity vector distributions in three dimensional flow fields was developed.
Consequently, the following results were specifically confirmed. 1) The image processing instrumentation system of velocity vector distributions by using correlation method was established. It was proved that this system was very useful for even an unsteady flow field. And, the algorism for correcting erroneous velocity vectors was developed.
2) The velocity vector distributions in different water depths of a three dimensional flow were simultaneously obtained by the color separation of the image.
3) The changes of temperature and velocity vector distributions with time were obtained by applying the system to the dynamic behavior of a thermal stratification. In this color image processing instrumentation system, however, the spatial resolution of color measurement is still lower. Therefore, the problem remains that to be solved in the future is to develop an extensively used color separation algorism and study the strict relation between the temperature and the color.

Report

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

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 木村一郎: 流れの可視化. 6-22. 269-272 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 木村一郎: システムと制御. 30-12. 761-770 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] I. Kimuta: Flow Visualization IV. Hem isphere pub.221-226 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 木村一郎: 計測自動制御学会論文集. 23-2. 101-107 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 木村治央: 流れの可視化. 7-26. 297-300 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] I. Kimuta: Proc. 2nd International Symposium on Fluid Control and Measurement Sheffield. (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] I. Kimura: "Image Processing Instrumentation of Velocity Vector Distributions in Two-Dimensional Flow Fields" Systems and Control. 30-12. 761-770 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] I. Kimura: "Image Processing of Flow around a Circular Cylinder by Using Correlation Technique" Flow Visualization 4, Hemisphere pub.221-226 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] I. Kimura: "Image Processing Instrumentation of Flow Velocity Vector Distribution by Using Correlation Technique --- Application to Vortices in the Wake of a Circular Cylinder ---" Trans. the Society of Instrument & Control Engineers. 23-2. 101-107 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] H. Kimura: "Image Processing Instrumentation of flow by Using Correlation Rechnique --- Correction of Erroneous Velocity Vectors ---" J. the Flow Visualization Society of Japan. 7-26. 297-300 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] I. Kimura: "Image Processing Instrumentation of Flow Velocity Vector Distribution --- Improvement of Spatial Resolution ---" Proc. 2nd International Symposium on Fluid Control and Measurement, Sheffield. (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 木村一郎: 流れの可視化. 6. 269-272 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 木村一郎: システムと制御. 30. 761-770 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] I.Kimura: Proc.of The 4th Int.Symposium on Flow Visualization,Paris. B2.7. (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 木村一郎: 計測自動制御学会論文集. 23. 101-107 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 木村一郎: 第4回流体計測シンポジウム資料. 49-52 (1987)

    • Related Report
      1986 Annual Research Report

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

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