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Wall surface design for shock wave confinement region control

Research Project

Project/Area Number 19K04182
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 InstitutionNara National College of Technology

Principal Investigator

Fukuoka Hiroshi  奈良工業高等専門学校, 機械工学科, 准教授 (40582648)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords圧縮性流体 / 超音速噴流 / 衝撃波 / 反射衝撃波 / 収束現象 / 閉じ込め / 可視化 / 3D数値解析 / 数値解析 / BOS法 / 反射制御 / 壁面形状
Outline of Research at the Start

本研究では,工業,新エネルギー,材料開発で重要な課題である,衝撃波の多重閉じ込め現象を制御する壁面表面形状の設計指針の獲得と、その実験的実証を行う.噴流誘起衝撃波の壁面-噴流先頭間反射による多重閉じ込め現象を,時間分解観測することで,衝突平板壁面の形状と閉じ込めの効率の関係を明らかにし,圧縮性流体のシミュレーションにより閉じ込めが起こる条件での圧力・密度・速度を調べ,閉じ込めに必要な物理条件を明らかにする.その結果に基づいて,壁面-噴流間の反射による多重閉じ込め現象を制御する壁面形状を実際に設計・製作し,表面形状設計の効果を実証する.

Outline of Final Research Achievements

In this study, we obtained design guidelines for the wall surface shape that controls the multiple confinement phenomenon of shock waves, a crucial issue in industry, new energy, and material development. We experimentally demonstrated the design guidelines. In order to clarify the physical conditions necessary for confinement, measurement experiments using a concave-shaped reflector, which is thought to be able to change the physical conditions of the shock wave, revealed experimentally the positional relationship between the convergence position of the shock wave and the jet stream. This indicates that shock waves of various strengths can impinge on the jet, which will be important in the design of future geometries. Furthermore, we found the possibility that the reflection of the shock wave by the jet can be qualitatively organized in terms of acoustic impedance.

Academic Significance and Societal Importance of the Research Achievements

これまで衝撃波が壁面で反射する現象についての基礎的研究は行われてきたが,噴流との反射に関してはほとんど存在なかった.本研究では,噴流と様々な衝撃波を衝突させることで,反射の過程を明らかにした.その結果,噴流および衝撃波が衝突する直前の物理的状態が,衝撃波の反射に大きく影響し,衝撃波および噴流の制御が閉じ込めの指針になることを示した.

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2023 2022 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] Improvement of Background Oriented Schlieren Method Focused on Amplitude of Wavelet Transform2020

    • Author(s)
      Miyaoku Koki, Fukuoka Hiroshi, Nakamura Shigeto, Yao Masanori, Hiro Kazuki
    • Journal Title

      IOP Conference Series: Materials Science and Engineering

      Volume: Vol. 886, Num. 012037 Issue: 1 Pages: 012037-012037

    • DOI

      10.1088/1757-899x/886/1/012037

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 小容積衝撃波管から放出された噴流誘起衝撃波および噴流の衝突過程の観測2023

    • Author(s)
      出山敬太郎,福岡寛,中村篤人,廣和樹,矢尾匡永
    • Organizer
      2023年度日本設計工学会関西支部研究発表講演会,2024.3.2,奈良工業高等専門学校
    • Related Report
      2023 Annual Research Report
  • [Presentation] 対向壁を有する反射衝撃波の閉じ込め現象に関する数値解析2023

    • Author(s)
      坂倉 哲史, 福岡 寛, 須田 敦, 矢尾 匡永
    • Organizer
      日本機械学会関西学生会2023 年度学生員卒業研究発表講演会前刷集, 07PM1-4 ,(2024.3.14,大阪工業大学)
    • Related Report
      2023 Annual Research Report
  • [Presentation] W-BOS法に超解像技術を用いた空間解像度の向上2023

    • Author(s)
      前田 和輝, 福岡 寛, 須田 敦, 矢尾 匡永
    • Organizer
      日本機械学会関西学生会2023 年度学生員卒業研究発表講演会前刷集, 07PM1-3 ,(2024.3.14,大阪工業大学)
    • Related Report
      2023 Annual Research Report
  • [Presentation] W-BOS法を用いた小容積衝撃波管より流出する超音速流れの可視化2023

    • Author(s)
      松川航大,福岡寛,中村篤人,須田敦
    • Organizer
      2022年度衝撃波シンポジウム講演論文集,1A3-2,(2023.3.8-10,産業技術総合研究所)
    • Related Report
      2022 Research-status Report
  • [Presentation] 収束衝撃波および超音速噴流の可視化実験について2023

    • Author(s)
      庄野 晴人,福岡 寛,須田 敦,矢尾 匡永
    • Organizer
      日本機械学会関西学生会2022 年度学生員卒業研究発表講演会前刷集,11033,(2023.3.15,京都工芸繊維大学)
    • Related Report
      2022 Research-status Report
  • [Presentation] Effect of Exit Diameter of Elliptical Cell attached to Small Shock Tube on Shock Wave-Induced Vortex Ring and Unsteady Jet2022

    • Author(s)
      Bomura Ryu, Fukuoka Hiroshi, Suda Atsushi, Kuniyoshi Nao, Yaga Minoru, Ueno Eri, Takiya Toshio and Fukuda Naoaki
    • Organizer
      The 12th TSME International Conference on Mechanical Engineering, 15 December 2022, Phuket, Thailand.
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Experimental Observation of Collision Process between Converging Shock Wave and Supersonic Jet2022

    • Author(s)
      Keitaro Deyama, Hiroshi Fukuoka, Atsushi Suda, and Shigeto Nakamura
    • Organizer
      9th Asian Joint Workshop on Thermophysics and Fluid Science(AJWTF2022), 4058, (2022.11.27-30, MYSTAYS Utsunomiya, Japan)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 小容積衝撃波管を用いた衝撃波閉じ込め現象に関する研究2022

    • Author(s)
      出山 敬太郎、福岡 寛、須田 敦、松川 航大
    • Organizer
      日本機械学会関西学生会2021年度学生員卒業研究発表講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Study of Shock Wave Confinement Phenomenon Using Small Chamber Shock Tube2021

    • Author(s)
      Matsukawa Kota, Fukuoka Hiroshi, Nakamura Shigeto, Suda Atsushi
    • Organizer
      Proceedings of the 32th International Symposium on Transport Phenomena (ISTP32)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] STUDY ON SHOCK WAVE CONFINEMENT USING SMALL HIGH-PRESSURE CHAMBER SHOCK TUBE2020

    • Author(s)
      MIYAOKU Koki, FUKUOKA Hiroshi, NAKAMURA Shigeto, ENOKI Shinichi,HIRO Kazuki and YAO Masanori
    • Organizer
      31th International Symposium on Transport Phenomena
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 小容積衝撃波管を用いた超音速噴流および収束衝撃波の干渉2020

    • Author(s)
      宮奥晃希,福岡寛,中村篤人,榎真一,廣瀬裕介,廣和樹,矢尾匡永
    • Organizer
      2020年度衝撃波シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 高圧小容積衝撃波管を用いた衝撃波閉じ込め現象の解明2020

    • Author(s)
      松川 航大,宮奥 晃希,福岡 寛,矢尾 匡永,須田 敦,中村 篤人
    • Organizer
      日本機械学会関西学生会2020年度学生員卒業研究発表講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 高圧小容積の衝撃波管から噴出する超音速噴流および反射衝撃波の干渉に関する研究2019

    • Author(s)
      宮奥晃希,福岡寛,中村篤人,榎真一,太田匡則,廣瀬裕介,廣和樹,矢尾匡永
    • Organizer
      2019年度衝撃波シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] Improvement of Background Oriented Schlieren Method Focused on Amplitude of Wavelet Transform2019

    • Author(s)
      Miyaoku Koki, Fukuoka Hiroshi, Nakamura Shigeto, Yao Masanori and Hiro Kazuki
    • Organizer
      The 10th TSME International Conference on Mechanical Engineering
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study of Interference between Supersonic Jet and Reflected Shock Wave Ejected from Small High-Pressure Chamber Shock Tube2019

    • Author(s)
      Miyaoku Koki, Fukuoka Hiroshi
    • Organizer
      Yellow Sea Rim Workshop on Explosion, Combustion and Other Energetic Phenomena for Various Environmental Issues: YSR2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2025-01-30  

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