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Development of the measuring technique for local wall shear stress by laser gradient meter

Research Project

Project/Area Number 07555382
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Fluid engineering
Research InstitutionKeio University

Principal Investigator

MASUDA Shigeaki  Keio University, Department of Mechanical Engineering, Professor, 理工学部, 教授 (90051664)

Co-Investigator(Kenkyū-buntansha) OBI Shinnosuke  Keio University, Department of Mechanical Engineering, Associate Professor, 理工学部, 助教授 (80233609)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥2,900,000 (Direct Cost: ¥2,900,000)
KeywordsWall shear stress / Laser gradient meter / Optical measurement / Turbulent flow / Optical fiber / wall shear stress / laser gradient meter / optical measurement / turbulent flow
Research Abstract

The optical technique for measuring the local wall shear stress has been developed. At the first year of the project, the feasibility study of the method has been conducted by performing the measurement in a two-dimensional channel flow for which a number of experiments in the past to be referred as well as DNS database are available. The measurements of turbulence statistics have been undertaken under the varying Reynolds number.
The test rig is a plane channel with the channel aspect ratio of 1 : 32 and 2m long. The width of the channel H is 20mm, and the measurements have been conducted at the location 160H distant from the channel inlet. The obtained mean skin friction coeffecient has well been corrilated with the existing experiments and DNS within 1%. The good agreements have been obtained also for the turbulence statistics such as the second-moment, skewness as well as the flatness factors.
In the second and third year of the project, the effort has been paid for the development of the transmitting optics system that makes use of an optical fiber joint to improve the flexibility of the system. Because the precise manipulation of the thin fiber has required an extreme skill for preparing the suitable fiber arrangement, requiring the adjustment of the distance between two parallel flber core to be 20mum, most of the period has been used to develop the fiber joint mechanism. However, the therefrom achieved system has been proven to be more stable and reliable compared to the original system.
It has also been discussed on the possibility of the use of analogue sensor that enables the detection of valid signal which may otherwise be rejected during the data validation algorithm in the statistic process. A V-type hot-wire sensor, mounted in a small hole on the wall, has found to be a potential candidate for the pilot analogue sensor system.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] 井上 敬太 他2名: "レーザグラディエントメータによる乱流壁面剪断応力の測定" 第32回日本伝熱シンポジウム講演論文集. I. 11-12 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 今川 宏明 他2名: "壁面剪断応力測定のための接着型ホットフィルムの動特性" 第32回日本伝熱シンポジウム講演論文集. I. 9-10 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.obi 他2名: "Experimental Study on the Statistics of Wall Shear Sfress in Turbulent Channel Flows" Proceedings of the Symposium on Turbulent Shear Flows. I. 5.19-5.24 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 古川 貴之 他2名: "チャネル乱流の局所壁面せん断応力の統計量" 第33回日本伝熱シンポジウム講演論文集. II. 19-20 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Obi 他2名: "Experimental Study on the Statistics of Wall Shear Sfress in Turbulent Channel Flows" International Journal of Hent and Fluid Flows. 17. 187-192 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 古川 貴之 他2名: "ファイバLGMを用いた壁面せん断応力統計量の計測" 第34回日本伝熱シンポジウム講演論文集. II. 351-352 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Inoue, K., Obi, S.and Masuda, S.: "Measurement of turbulent wall shear stress by a laser gradient meter" Proceedings of 32^<nd> National Heat Transfer Symposium of Japan. vol.1. 11-12 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Imagawa, H., Obi, S.and Masuda, S.: "Dynamic response of flush-mounted hot film for measurements of wall shear stress" Proceedings of 32^<nd> National Heat Transfer Symposium of Japan. vol.1. 9-10 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Obi, S., Inoue, K., Furukawa, T.and Masuda, S.: "Experimental study on the statistics of wall shear stress in turbulent channel flows" Proceedings of Tenth Symposium on Turbulent Shear Flows. 19-24 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Furukawa, T., Obi, S.and Masuda, S.: "Turbulence statistics of local wall shear stress in turbulent channel flow" Proceedings of 33^<rd> National Heat Transfer Symposium of Japan. vol.1. 19-20 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Obi, S., Inoue, K., Furukawa, T.and Masuda, S.: "Experimental study on the statistics of wall shear stress in turbulent channel flows" International Journal of Heat and Fluid Flow. vol.17. 187-192 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Furukawa, T., Obi, S.and Masuda, S.: "Measurement of statistics of turbulent wall shear stress by fiber LGM" Proceedings of 34^<th> National Heat Transfer Symposium of Japan. vol.2. 351-352 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 古川貴之 他2名: "ファイバLGMを用いた壁面せん断応力統計量の計測" 第34回日本伝熱シンポジウム講演論文集. Vol.II. 351-352 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] S.Obi et al.: "Experimental study on the statistics of wall shear stress in turbulent channel flows" International Journal of Heat and Fluid Flows. Vol17.No.3. 187-192 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 古川貴之他3名: "チャネル乱流の局所壁せん断応力の統計量" 第33回日本伝熱シンポジウム講演論文集. 19-20 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 井上・小尾・益田: "レーザグラディエントメータによる乱流壁面剪断応力の測定" 第32回日本伝熱シンポジウム講演論文集. I. 11-12 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 今川・小尾・益田: "壁面剪断応力測定のための接着型ホットフィルムの動特性" 第32回日本伝熱シンポジウム講演論文集. I. 9-10 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Obi,Inoue,Furukawa,Masuda: "Experimental Study on the Statistics of Wall Shear Stress in Turbulent Channel Flows" Proceedings of the Tenth Symposium on Turbulent Shear Flows. I. 5.19-5.24 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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