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Fundamental Study on Jet Vectoring using Coanda Effect

Research Project

Project/Area Number 18K03936
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 InstitutionKogakuin University

Principal Investigator

SATO KOTARO  工学院大学, 工学部, 教授 (80252625)

Co-Investigator(Kenkyū-buntansha) 横田 和彦  青山学院大学, 理工学部, 教授 (70260635)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsJet / Frequency / Coanda effect / Vectoring / ジェットベクタリング / 噴流 / コアンダ効果 / 周波数 / シンセティックジェット / 振動特性
Outline of Final Research Achievements

In this study, the influence of synthetic jets near a circular cylinder on the flow characteristics of a primary jet was investigated. The main results obtained in the study were that the direction of the primary jet flow can be controlled using the secondary synthetic jet, and the degree of jet deflection depends on the frequency of the velocity oscillation for the secondary synthetic jet under an identical momentum ratio. Furthermore, when using the synthetic jet as the secondary flow, a controllable region larger than that obtained when using a steady and continuous injection or suction flow is expected. This is because secondary flow is generated using the ratio of the momentum between the primary jet and the secondary flow at the slot exit in conjunction with the dimensionless frequency of the synthetic jet based on the velocity of the primary flow at the slot exit.

Academic Significance and Societal Importance of the Research Achievements

噴流に関する研究は失速抑制や抵抗軽減,流体機械での不安定流れの抑制,空調・エアカーテンの高性能化などを目的として盛んに行われきた.最近ではウイルス飛沫感染防止を目的として換気・空調の気流制御に噴流技術を利用する研究が始まっている.噴流の進行方向を自由に調整することが可能になれば,より一層広い分野で噴流技術が役立つことは間違いない.本研究では幾何形状の変化を伴わない噴流の方向制御を目指し,その実現のためにシンセティックジェットが適用された.シンセティックジェットの無次元周波数による流れ場の制御と噴流偏向メカニズムについて議論がなされ,シンセティックジェットによる流動制御の可能性が示された.

Report

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

    (24 results)

All 2021 2020 2019 2018 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (17 results) (of which Int'l Joint Research: 17 results) Remarks (1 results)

  • [Journal Article] Jet Direction Control Using Circular Cylinder with Tangential Blowing2021

    • Author(s)
      Qiang ZHANG, Fumiya TAKAHASHI, Kotaro SATO, Wakana TSURU, and Kazuhiko YOKOTA
    • Journal Title

      Transactions of Japan Society for Aeronautical and Space Sciences

      Volume: 64 Pages: 1-8

    • NAID

      130008034548

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Jet vectoring using secondary Coanda synthetic jets2020

    • Author(s)
      Kobayashi, R., Watanabe, Y., Tamanoi, Y., Nishibe, K., Kang, D., Sato, K.
    • Journal Title

      Mechanical Engineering Journal

      Volume: 7 Issue: 5 Pages: 20-00215-20-00215

    • DOI

      10.1299/mej.20-00215

    • NAID

      130007926527

    • ISSN
      2187-9745
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Behavior of Plane Synthetic Jets Generated by an Asymmetric Stepped Slot2020

    • Author(s)
      Ryota Kobayashi, Hiroaki Terakado, Kotaro Sato, Junya Taniguchi, Koichi Nishibe, and Kazuhiko Yokota
    • Journal Title

      International Journal of Fluid Machinery and Systems

      Volume: 13 Issue: 1 Pages: 253-265

    • DOI

      10.5293/ijfms.2020.13.1.253

    • NAID

      130007821720

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Three-Dimensional Theoretical Study on Flow Characteristics of a Spiral-Channel Viscous Micropump2019

    • Author(s)
      2.Donghyuk Kang, Koichi Nishibe, Kotaro Sato and Kazuhiko Yokota
    • Journal Title

      International Journal of Fluid Machinery and Systems

      Volume: 12 Issue: 2 Pages: 169-180

    • DOI

      10.5293/IJFMS.2019.12.2.169

    • NAID

      130007668915

    • ISSN
      1882-9554
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of Stroke on Performance Characteristics of Synthetic Jet Fan2018

    • Author(s)
      K. Nishibe, Y. Nomura, K. Noda, H. Ohue, and K. Sato
    • Journal Title

      Journal of Applied Fluid Mechanics

      Volume: 11 Pages: 929-943

    • DOI

      10.18869/acadpub

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vector control of synthetic jets using an asymmetric slot2018

    • Author(s)
      Ryota Kobayashi, Koichi Nishibe, Yusuke Watabe, Kotaro Sato, Kazuhiko Yokota
    • Journal Title

      ASME Journal of Fluids Engineering

      Volume: 140 Issue: 5 Pages: 051102-11

    • DOI

      10.1115/1.4038660

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] JET STRUCTURE OF PLANE AND CURVED WALL-SYNTHETIC JET2020

    • Author(s)
      K. YAMAGUCHI, T. SAKAKURA, K. NISHIBE, H. OHUE and K. SATO
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] STUDY ON JET STRUCTURE OF SYNTHETIC JET IN AN ASYMMETRIC FLOW FIELD2020

    • Author(s)
      S. KAWADA, K. YAMAGUCHI, K. NISHIBE, H. OHUE and K. SATO
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] INFLUENCE OF STROKE ON JET STRUCTURE OF WALL-SYNTHETIC JET FLOWING OVER CIRCULAR CYLINDER2020

    • Author(s)
      T. SAKAKURA, K. YAMAGUCHI, K. NISHIBE, H. OHUE and K. SATO
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NFLUENCE OF STEPPED SLOT GEOMETRY ON THE DEFLECTION OF SYNTHETIC JETS2020

    • Author(s)
      R. KAWAHARA, R. KOBAYASHI, K. SATO, K. NISHIBE and T.YOKOTA
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FLOW CONTROL USING EXCITED JETS WITH COANDA SURFACES2020

    • Author(s)
      Y. TAMANOI, R. KOBAYASHI, K. SATO, K. NISHIBE and D. KANG
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] INTERACTION BETWEEN A CONTINUOUS JET AND SYNTHETIC JET2020

    • Author(s)
      Y. Suzuki, R. Kobayashi, K. Sato, K. Nishibe, and K. Yokota
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] NUMERICAL STUDY ON EXCITED JETS USING THE VORTEX METHOD2020

    • Author(s)
      H. SASAYAMA, K. SATO, K. NISHIBE, D. KANG AND K. YOKOTA
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Control of Jet Structure Utilizing the Change in the Outlet Velocity Distribution with Time2020

    • Author(s)
      C. Ichihara, D. Yamaguchi, R. Kobayashi, K. Nishibe, K. Yokota, and K. Sato
    • Organizer
      18th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (accepted)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Jet Direction Control using Secondary Flows2020

    • Author(s)
      Y. Tamanoi, Y. Watanabe, R. Kobayashi and K. Sato
    • Organizer
      18th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (accepted)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Behavior of Swirling Flow Generated by Annular Guide Vanes2019

    • Author(s)
      Kotaro Yamanaka, Kazuya Takeda, Ryota Kobayashi, Kotaro Sato, Kazuhiko Yokota, Koichi Nishibe
    • Organizer
      15th International Conference on Fluid Control, Measurements and Visualization
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Interaction between cavitation and gas bubbles near a rigid boundary2019

    • Author(s)
      Kotaro Ohno, Tetsuro Yamashita, Kotaro Sato, Yukio Tomita, Hideki Takezawa
    • Organizer
      15th International Conference on Fluid Control, Measurements and Visualization
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] FLOW OBSERVATION OF SYNTHETIC JETS PRODUCED BY ASYMMETRIC SLOT2018

    • Author(s)
      Hiroaki Terakado, Ryota Kobayashi, Koichi Nishibe, Kotaro Sato
    • Organizer
      THE 17th INTERNATIONAL SYMPOSIUM ON ADVANCED TECHNOLOGY
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Behavior of Pulsating Jets near a Rigid Boundary2018

    • Author(s)
      Daiki Yamaguchi, Kotaro Sato
    • Organizer
      THE 17th INTERNATIONAL SYMPOSIUM ON ADVANCED TECHNOLOGY
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of frequency on flow field of wall-synthetic jet flowing over circular cylinder2018

    • Author(s)
      Hideyuki Shibata, Yuya Fujii, Ryosuke Takeuchi, Koichi Nishibe, Hiroshi Ohue and Kotaro Sato
    • Organizer
      29th International Symposium on Transport Phenomena
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Behavior of synthetic jets near rigid plane boundary2018

    • Author(s)
      Junya Taniguchi, Seiya Kawada, Ryota Kobayashi, Koichi Nishibe, Hiroshi Ohue and Kotaro Sato
    • Organizer
      29th International Symposium on Transport Phenomena
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effect of Geometry on Performance Characteristics of Synthetic Jet Fan2018

    • Author(s)
      Ryoichi Moriyama, Junya Taniguchi, Tomoto Tsuchiya, Koichi Nishibe, Hiroshi Ohue and Kotaro Sato
    • Organizer
      29th International Symposium on Transport Phenomena
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Vector Control of Jet Flow using Secondary Excited Jets2018

    • Author(s)
      Yuki Watanabe, Kotaro Sato, Makoto Sato, Koichi Nishibe, Kang Donghyuk and Kazuhiko Yokota
    • Organizer
      29th International Symposium on Transport Phenomena
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] 工学院大学 流体機械研究室

    • URL

      http://www.ns.kogakuin.ac.jp/~wwa1038/

    • Related Report
      2020 Annual Research Report 2019 Research-status Report 2018 Research-status Report

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

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