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Development of low noise porous plate by interaction of 3-dimentinal vortices in non-circular jets.

Research Project

Project/Area Number 16K06071
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Fluid engineering
Research InstitutionKanazawa University

Principal Investigator

Kiwata Takahiro  金沢大学, 機械工学系, 教授 (40225107)

Co-Investigator(Kenkyū-buntansha) 小松 信義  金沢大学, 機械工学系, 准教授 (20436827)
河野 孝昭  金沢大学, サステナブルエネルギー研究センター, 准教授 (90630921)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords噴流 / 非円形多孔ノズル / タブ / 渦干渉 / パッシブ制御 / 空力騒音 / 流体計測 / 数値流体解析 / 流体工学 / 騒音制御
Outline of Final Research Achievements

Multiple jets issuing from multiple nozzles or holes are used in various applications, such as multi-jet combustion chambers and air ventilation systems. To improve the performance multi-jet devices, it is necessary to understand the mixing and evolution of multiple circular and non-circular jets. The present research project has clarified the influences of the nozzle spacing ratio of circular nozzle, and the shape, the aspect ratio and azimuthal orientation of non-circular nozzle on the flow characteristics and the fluid dynamics noise of multiple elliptic jets issuing from a 4×4, 6×6, 8×8 square matrix nozzle arrangement experimentally and numerically. We found that the combined flow formed by the confluence of the multiple elliptic jets for the alternate azimuthal orientation arrangement developed earlier than that for the same azimuthal orientation arrangement.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、多孔板の穴形状だけを変える方法、つまり外部からエネルギーを加えない受動的な噴流制御方法である。穴の配列パターンと三次元ノズルの形状を利用して混合拡散を早めることが可能となる。実験と数値解析の両面から研究を進めたことで、複数個の噴流群の拡散や抑制のメカニズムに関する知見が得られている。噴流の混合発達が促進される多孔板としての利用の他に、広い面積で均一に冷却・加熱する場合の噴流群のノズル設計開発に役立つ。これまでの多孔板はデザインが重視されている点もあるが、本研究成果により流体力学的な観点から見た新しい多孔板の開発が実現すると言える。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2019 2018 2017 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results) Remarks (3 results)

  • [Journal Article] Flow characteristics of multiple round jets issuing from in-line nozzle arrangement2019

    • Author(s)
      Teramoto,H and Kiwata,T.
    • Journal Title

      Fluid-Structure-Sound Interactions and Control

      Volume: 1 Pages: 161-167

    • DOI

      10.1007/978-981-10-7542-1_25

    • ISBN
      9789811075414, 9789811075421
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flow characteristics of multiple round jets issuing from in-line nozzle arrangement2018

    • Author(s)
      Teramoto, H. and Kiwata, T.
    • Journal Title

      Proceedings of the 4th Symposium on Fluid-Structure-Sound Interaction and Control

      Volume: 1 Pages: 1-5

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 楕円形ノズルのアスペクト比と方向が噴流特性に与える影響2019

    • Author(s)
      津山凌史郎, 木綿隆弘,寺本裕志
    • Organizer
      日本機械学会北陸信越支部第48回学生員卒業研究発表講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 円形複数噴流の流体音に関する実験的研究2019

    • Author(s)
      寺本裕志, 木綿隆弘, 臼沢太一
    • Organizer
      日本機械学会北陸信越支部 第56期総会・講演会 講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Influence of Nozzle Aspect Ratio and Orientation on Flow Characteristics of Multiple Elliptic Jets2019

    • Author(s)
      Teramoto, H., Kiwata,T., Yajima, K.
    • Organizer
      ASME-JSME-KSME 2019 Joint Fluids Engineering Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 正方行列状複数円形噴流の孔数が流れ特性に与える影響2018

    • Author(s)
      寺本裕志, 木綿隆弘, 臼沢太一
    • Organizer
      第46回可視化情報シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 複数噴流のノズル形状が流れ場に与える影響2018

    • Author(s)
      寺本裕志, 木綿隆弘, 伊藤里沙子, 小松信義, 河野孝昭
    • Organizer
      日本機械学会北陸信越支部 第55期総会・講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Flow characteristics of multiple round jets issuing from in-line nozzle arrangement2017

    • Author(s)
      H. Teramoto, T. Kiwata
    • Organizer
      4th Symposium on Fluid-Structure-Sound Interactions and Control
    • Place of Presentation
      日本大学駿河台キャンパス
    • Year and Date
      2017-08-21
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Flow characteristics of multiple round jets issuing from in-line nozzle arrangement2017

    • Author(s)
      Teramoto, H. and Kiwata, T.
    • Organizer
      4th Fluid-Structure-Sound Interaction and Control
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 複数楕円形噴流の流れ特性に関する研究

    • URL

      http://www.ms.t.kanazawa-u.ac.jp/~fluid/home/research/research_umi/funryu4/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks] 金沢大学流体工学研究室

    • URL

      http://www.ms.t.kanazawa-u.ac.jp/~fluid/

    • Related Report
      2017 Research-status Report
  • [Remarks] 金沢大学流体工学研究室

    • URL

      http://www.ms.t.kanazawa-u.ac.jp/̃fluid/

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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