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Characteristics of The Boundary Layer with 3-Dimensionally Separated Vortices

Research Project

Project/Area Number 02452186
Research Category

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

Allocation TypeSingle-year Grants
Research Field 船舶抵抗・運動性能・計画
Research InstitutionOsaka University

Principal Investigator

SUZUKI Toshio  Osaka University, Naval Architecture & Ocean Engineering Professor, 工学部, 教授 (80029107)

Co-Investigator(Kenkyū-buntansha) TODA Yasuyuki  Osaka University, Naval Architecture & O. E. Assistant, 工学部, 助手 (20172166)
MATSUMURA Kiyosige  Osaka University, Naval Architecture & O. E. Assoc. Prof., 工学部, 助教授 (10135668)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥6,200,000 (Direct Cost: ¥6,200,000)
Fiscal Year 1991: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 1990: ¥3,500,000 (Direct Cost: ¥3,500,000)
Keywords3-d separated Vortices / 3-d Boundary Layer / Reynolds' Stress / Flow Visualization / Image Processing / Junction Flow / Interaction Between B. L. and Vortices / 三次元境界層 / 三次元剥離渦
Research Abstract

The objective of this paper is to investigate into the characteristics of the boundary layer with longitudinal vortices experimentally and numerically. The investigation on characteristics of turbulence or Reynolds' stresses in the velocity field are also aimed using LDV system.
The following results are obtained.
1. Velocity components, turbulence and the Reynolds' stresses measurements behind a obliqued body are performed by LDV to clarify the accuracy of LDV in the flow field with large 3-d separasion. Qualitative differances are observed between the inner and the outer region of the 3-d separation.
2. New image processing techniques are developed to explain the 3-dimensional distortion of the flow field. The details are as follows.
1) Laser holograms are useful to record and reproduce the 3-dimensional flow field.
2) TV camera system is developed to measure unsteady velocity field near the 3-dimensional separation.
3) Stereoscopic methods combined with a slit light sheet and cross-correlation method are developed to measure the 3-d velocity field in a cross-sectional plane.
These techniques are quite useful to get the velocity field in a cross section simultaneously.
3. New numerical calculations method are developed to make clear the effects of longitudinal vortices. The vortices are generated near the junction of two bodies, wing and flat plate, and increment of shear stress around the wing is clarified.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 平工 良三,川勝 充,鈴木 敏夫: "トレ-サ画像による流場計測の一手法(第二報)" 関西造船協会誌. 214. 59-64 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 川勝 充,平工 良三,鈴木 敏夫: "トレ-サ画像による流場計測の一手法(第三報)" 関西造船協会誌. 215. 75-79 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 鈴木 敏夫,戸田 保幸,浜住 順二,岡 秀樹: "翼と平板の接合部近傍の流れの数値シミュレ-ション" 関西造船協会誌(関西造船協会平成4年春季講演会). (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 鈴木 敏夫,川勝 充,開発 渉: "相関法を用いた3次元流場計測法" 可視化情報学会誌(第20回流れの可視化シンポジュ-ム). (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] R. HIRAKU and T. SUZUKI: "A Technique to Measure The Velocity by An Analysis of Tracer Pathline Images (2nd Report)" Journal of The Kansai Society of Naval Architects, Japan. 214. 59-64 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. KAWAKATSU, R. HIRAKU AND T. SUZUKI: "Do. (3rd Report) -Three-Dimensional Velocity Measurement by Use of The Correlation method-" Journal of The Kansai Society of Naval Architects, Japan. 215. 75-79 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. SUZUKI, Y. TODA, J. HAMAZUMI AND H. OKA: "Laminar Flow Computation Around Wing-Body Junctions -Flow Visualization by Use of Computational Results-"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. SUZUKI, M. KAWAKATSU AND W. KAIHOTSU: "3-Dimensional Velocity Measurements Using Cross Correlation Method"

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 川勝 充,平工 良三,鈴木 敏夫: "トレ-サ画像による流場計測の一手法(第三報)" 関西造船協会誌. 215. 75-79 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 鈴木 敏夫,戸田 保幸,浜住 順二,岡 秀樹: "翼と平板の接合部近傍の流れの数値シミュレ-ション" 関西造船協会誌(関西造船協会平成4年春季講演会発表,1992.5.22).

    • Related Report
      1991 Annual Research Report
  • [Publications] 鈴木 敏夫,川勝 充,開発 渉: "相関法を用いた3次元流場計測法" 可視化情報学会誌(第20回可視化情報シンポジュ-ム発表,1992.7.14ー16).

    • Related Report
      1991 Annual Research Report
  • [Publications] 平工 良三、鈴木 敏夫: "トレ-サ画像による流場計測の一手法(第二報)" 関西造船協会誌. 214. 59-64 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 川勝 充、平工 良三、鈴木 敏夫: "トレ-サ画像による流場計測の一手法(第三報)" 関西造船協会誌造船3学会秋期連合大会講演済(1991.11.16). 215. 77-81 (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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