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Maximization of frictional drag reduction effect by coarseness and fineness distributed bubbles using multiphase turbulent shear stress meter

Research Project

Project/Area Number 20K04255
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19010:Fluid engineering-related
Research InstitutionMuroran Institute of Technology

Principal Investigator

Yoshihiko Oishi  室蘭工業大学, 大学院工学研究科, 准教授 (90617078)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords抵抗低減 / 気泡 / せん断応力 / 省エネルギー技術 / 船舶 / 乱流 / 乱流境界層 / 省エネルギー
Outline of Research at the Start

申請者はこれまで摩擦抵抗低減を実現するために混相流計測技術を開発に注視してきた.摩擦抵抗低減を研究する研究者がもっと欲しているのはせん断応力を精度よく獲得することである.時空間スケールにおいて個々の気泡や周囲流れが観測可能な高周波応答の流体摩擦の測定が求められる.本研究課題では混相流における高ダイナミックレンジの周波数応答のせん断応力測定法を独自に確立し,壁面摩擦抵抗低減効果を制御された粗密気泡分布で実証する.その基礎計測法を基に低減持続性に優れた粗密気泡群混入方法を提案することである.

Outline of Final Research Achievements

If we can establish a high-frequency-response fluid friction measurement that can observe individual bubbles and the flow around them, we can control the factors that increase the frictional resistance. The purpose of this research project is to independently establish a shear stress measurement method with high temporal resolution in multiphase flow and to demonstrate it under bubbly flow conditions. A high time-resolved laser shear stress meter was developed, and the shear stress when bubbles were mixed was successfully measured. We ensured that not only instantaneous fluctuations in shear stress but also average values could be measured. We challenged the extraction method of turbulence events, added an algorithm with conditional sampling, and analyzed changes in turbulence events. From this, it was found that the bubbly flow greatly contributes to the burst phenomenon.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は先進的なせん断応力測定を介して,流体の輸送に関する問題を解決ための技術基盤を構築した.乱流中における気泡流という複雑な流動場の高時間分解での計測により摩擦抵抗低減を効果的に実現するためのメカニズム解明に寄与する.本課題解決により,船舶における摩擦抵抗低減の最大化に最も貢献する.せん断応力は船舶の輸送効率を決定する対水速度計測の目となり,自動化など波及効果が高い.さらに,乱流中における気泡流の測定が可能になったことで,非ニュートン流体など様々な流体の直接測定の可能性を広げた.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (24 results)

All 2023 2022 2021 2020 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results) Remarks (4 results)

  • [Journal Article] Downstream persistence of frictional drag reduction with repetitive bubble injection2023

    • Author(s)
      T.Tanaka, Y.Oishi, H.J.Park, Y.Tasaka, Y.Murai, C.Kawakita
    • Journal Title

      Ocean Engineering

      Volume: 272 Pages: 113807-113807

    • DOI

      10.1016/j.oceaneng.2023.113807

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Frictional drag reduction caused by bubble injection in a turbulent boundary layer beneath a 36-m-long flat bottom model ship2022

    • Author(s)
      T.Tanaka, Y.Oishi, H.J.Park, Y.Tasaka, Y.Murai, C.Kawakita
    • Journal Title

      Ocean Engineering

      Volume: 252 Pages: 111224-111224

    • DOI

      10.1016/j.oceaneng.2022.111224

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Frictional drag reduction by bubble injection in turbulent boundary layers: Experiment with long model ship and full-scale estimation2022

    • Author(s)
      TANAKA Taiji、OISHI Yoshihiko、PARK Hyun Jin、TASAKA Yuji、MURAI Yuichi、KAWAKITA Chiharu
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 88 Issue: 907 Pages: 21-00297-21-00297

    • DOI

      10.1299/transjsme.21-00297

    • NAID

      130008141622

    • ISSN
      2187-9761
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Repetitive bubble injection promoting frictional drag reduction in high-speed horizontal turbulent channel flows2021

    • Author(s)
      Tanaka Taiji、Oishi Yoshihiko、Park Hyun Jin、Tasaka Yuji、Murai Yuichi、Kawakita Chiharu
    • Journal Title

      Ocean Engineering

      Volume: 239 Pages: 109909-109909

    • DOI

      10.1016/j.oceaneng.2021.109909

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Wall shear stress modified by bubbles in a horizontal channel flow of silicone oil in the transition region2020

    • Author(s)
      Oishi Yoshihiko、Murai Yuichi、Tasaka Yuji
    • Journal Title

      International Journal of Heat and Fluid Flow

      Volume: 86 Pages: 108748-108748

    • DOI

      10.1016/j.ijheatfluidflow.2020.108748

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Sampling scheme for wall shear stress in bubbly channel flow by variable-interval time-averaging method2023

    • Author(s)
      Yoshihiko Oishi, Hyun Jin Park, Yuichi Murai, Yuji Tasaka, Hideki Kawai
    • Organizer
      The 11th International Conference on Multiphase Flow (ICMF2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bubbly drag reduction promoted by generating void waves in high-speed turbulent channel flows2022

    • Author(s)
      Taiji Tanaka, Hyun Jin Park, Yoshihiko Oishi, Yuji Tasaka, Yuichi Murai, and Chiharu Kawakita
    • Organizer
      The 12th Japan-U.S. Seminar on Two-Phase Flow Dynamics 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Application of variable interval time averaging method to waveform of wall shear stress in bubbly channel flow2022

    • Author(s)
      Yoshihiko Oishi, Hyun Jin Park, Yuichi Murai, Yuji Tasaka, and Hideki Kawai
    • Organizer
      The 12th Japan-U.S. Seminar on Two-Phase Flow Dynamics 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水平チャネル流における異径気泡流による壁面せん断応力の比較測定2022

    • Author(s)
      下村 海斗,林 拓矢,大石 義彦,河合秀樹
    • Organizer
      日本機械学会北海道学生会,第51回学生員卒業研究発表講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 光ヘテロダイン式デュアルビーム法を用いた気泡流の乱流せん断応力計測2021

    • Author(s)
      林拓矢,藤井夏海,大石義彦,田中泰爾,朴炫珍,村井祐一,田坂裕司,川北千春,河合秀樹
    • Organizer
      混相流シンポジウム2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 長尺模型船における人工ボイド波の液相支配領域での局所剪断応力分布の評価2021

    • Author(s)
      藤井夏海,大石義彦,田中泰爾,朴炫珍,村井祐一,田坂裕司,濱田達也,川北千春,河合秀樹
    • Organizer
      混相流シンポジウム2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 乱流境界層への気泡注入による摩擦抵抗低減効果の下流持続性2021

    • Author(s)
      田中泰爾,大石義彦,朴炫珍,田坂裕司,村井祐一,川北千春
    • Organizer
      第25回 動力・エネルギー技術シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 36m長尺平板模型における間欠的気泡注入による空気潤滑法の高効率化2021

    • Author(s)
      田中泰爾,大石義彦,朴炫珍,田坂裕司,村井祐一,川北千春
    • Organizer
      日本船舶海洋工学会春季講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 高速チャネル乱流におけるボイド波生成による壁面せん断応力の変調2020

    • Author(s)
      田中泰爾,朴炫珍,大石義彦,田坂裕司,村井祐一,川北千春
    • Organizer
      日本流体力学会年会2020
    • Related Report
      2020 Research-status Report
  • [Presentation] 36m 長尺平板におけるボイド波生成による摩擦抵抗低減効果の促進2020

    • Author(s)
      田中泰爾,朴炫珍,大石義彦,田坂裕司,村井祐一,川北千春
    • Organizer
      混相流シンポジウム2020
    • Related Report
      2020 Research-status Report
  • [Presentation] 水平チャネル乱流における気泡挙動2020

    • Author(s)
      大石義彦
    • Organizer
      混相流シンポジウム2020
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 36m長尺平板を用いた気泡による摩擦抵抗低減実験における人工ボイド波の可視化2020

    • Author(s)
      大石義彦,中村隼人,田中泰爾,朴炫珍,田坂裕司,村井祐一,濱田達也,若生大輔,川北千春,河合秀樹
    • Organizer
      第48回 可視化情報シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 36m長尺平板における気泡抵抗低減時のせん断応力の変動2020

    • Author(s)
      大石義彦, 藤井夏海, 田中泰爾, 朴炫珍, 田坂裕司, 村井祐一, 濱田達也, 川北千春
    • Organizer
      日本機械学会第98期 流体工学部門講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 北海道大学・室蘭工業大学f3センターグリーン船舶ユニット2020

    • Author(s)
      村井祐一,堀本康文,朴炫珍,田坂裕司,大石義彦,永田晴紀
    • Organizer
      日本機械学会北海道支部 第58回講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] チャネル流れにおける乱流せん断応力の計測2020

    • Author(s)
      林拓矢,藤井夏海,大石 義彦,河合秀樹
    • Organizer
      日本機械学会北海道学生会
    • Related Report
      2020 Research-status Report
  • [Remarks] 室蘭工業大学 流体工学研究室

    • URL

      https://www.facebook.com/FELMuroran

    • Related Report
      2022 Annual Research Report
  • [Remarks] 室蘭工業大学 流体工学研究室

    • URL

      https://www.facebook.com/FELMuroran

    • Related Report
      2021 Research-status Report
  • [Remarks] 室蘭工業大学研究者データベース RD-Soran 大石義彦

    • URL

      https://rdsoran.muroran-it.ac.jp/html/100000068_ja.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 室蘭工業大学 流体工学研究室

    • URL

      https://www.facebook.com/FELMuroran/

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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