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Research on Behavior Prediction of Cylindrical Line Structure with Rotation in Flow

Research Project

Project/Area Number 18H01634
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 24020:Marine engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

RHEEM Chang Kyu  東京大学, 生産技術研究所, 教授 (70272515)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2020: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2018: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Keywords回転円柱 / 流体力 / 流速分布 / 付加質量 / 流速力 / 流れ構造 / 離散渦法 / エンドプレート / 円筒型線状構造物 / 回転 / 流れ / 負荷質量
Outline of Final Research Achievements

The characteristics of the fluid force acting on a rotating cylinder in the flow and the motion characteristics of the cylindrical line structure rotating in the flow were clarified. Drag decreases until the rotation ratio is around α = 1.2, and then increases. Lift increases to around α = 3. Then, along with drag and lift, the increase in value weakens from around α = 3. The flow velocity in the rotation direction can be made dimensionless by the surface velocity of the cylinder. In addition, the distance from the surface of the cylinder can be made dimensionless by the radius of the cylinder, which decreases logarithmically with respect to the radial direction. In the basin experiment using the flexible model, it was confirmed that the motion frequency of the model shifts to a lower frequency as the rotation speed increases. It is considered that rotation increases the additional mass of the model.

Academic Significance and Societal Importance of the Research Achievements

流れ中で回転する円筒構造物の流体力及び運動特性が明らかになり、その原因が円柱周りの流れであることが明確になった。それにより、流れ中におかれた回転する円筒構造物の応力及び振動が予測可能となり、最適で安全なドリルパイプ運用に結びつく制御方法の可能性が見えてきた。また、回転による流れ中におかれる円筒構造物の揚力増加の大きさや回転速度との関係が明らかになったことで、回転により発生すると揚力を活用する新たな機構の構想につながることが期待できる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(8 results)

All 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] EXPERIMENTAL STUDY ON THREE‐DIMENSIONALITY OF FLUID FORCE ACTING ON A ROTATING CYLINDER IN A UNIFORM FLOW2020

    • Author(s)
      1. 鈴木雅洋,居駒知樹,相田康洋,増田光一,林昌奎
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

      Volume: Vol.76, No.2 Issue: 2 Pages: 1207-1212

    • DOI

      10.2208/kaigan.76.2_i_1207

      10.2208/kaigan.76.2_I_1207

    • NAID

      130007935755

    • ISSN
      1883-8944, 1884-2399
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Experimental Study on the Flow Around a Rotating Cylinder2020

    • Author(s)
      C.K. Rheem
    • Organizer
      OMAE2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 一様流中において回転する円柱の端部影響に関する実験的研究2020

    • Author(s)
      鈴木雅洋,居駒知樹,相田康洋,増田光一,林昌奎
    • Organizer
      日本船舶海洋工学会講演会論文集、第30号
    • Related Report
      2020 Annual Research Report
  • [Presentation] 回転円柱周りの流速分布とレイノルズ応力2020

    • Author(s)
      林昌奎, 黒川洸
    • Organizer
      日本船舶海洋工学会講演会論文集、第30号
    • Related Report
      2020 Annual Research Report
  • [Presentation] 一様流中において回転する円柱の流体力に関する実験的研究2020

    • Author(s)
      鈴木雅洋,居駒知樹,相田康洋,増田光一,林昌奎
    • Organizer
      第28回海洋工学シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 回転円柱周りの流れ場に関する実験的研究2020

    • Author(s)
      黒川洸,林昌奎
    • Organizer
      第28回海洋工学シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] INVESTIGATION OF THE 2D BEHAVIOR OF A ROTATING CYLINDER IN FLOW USING THE DISCRETE VORTEX METHOD2019

    • Author(s)
      Chang-Kyu Rheem
    • Organizer
      38th International Conference on Ocean, Offshore and Arctic Engineering
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 離散渦法による流れ中の2次元回転円柱の挙動考察2018

    • Author(s)
      林昌奎
    • Organizer
      日本船舶海洋工学会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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