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Extension of definition of flame sperad considering cool flame and application to dispersed phase combustion physics for aero engine

Research Project

Project/Area Number 21H01532
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 24010:Aerospace engineering-related
Research InstitutionYamaguchi University

Principal Investigator

Mikami Masato  山口大学, 大学院創成科学研究科, 教授 (20274178)

Co-Investigator(Kenkyū-buntansha) 坂野 文菜  山口大学, 大学院創成科学研究科, 講師 (40961735)
瀬尾 健彦  山口大学, 大学院創成科学研究科, 准教授 (00432526)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2021: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Keywords燃焼 / 微小重力 / 液体燃料 / 液滴群 / 燃え広がり / 冷炎
Outline of Research at the Start

航空エンジンにおいては,始動時や高空失火後の再着火において燃料噴霧の液滴間燃え広がりによる群燃焼状態への移行が必要となる.最近のISSにおける宇宙燃焼実験により,従来は熱炎の発生により定義されていた液滴間燃え広がりにおいて観察が困難な冷炎も発生しており,それが群燃焼発現限界に影響を与えている可能性が示唆された.そこで,冷炎発生を考慮して液滴間燃え広がりの定義を拡張し,微小重力科学による燃え広がり現象の極限把握を行う.そして,その知見を利用してパーコレーション理論も拡張することで,航空エンジン用の複雑系混相燃焼物理のさらなる高度化へと展開を行う.

Outline of Final Research Achievements

The purpose of this study is to extend the definition of the flame spread by focusing on a cool flame, which is important in the phenomenon appearing around the flame-spread limit observed in the space-based experiments conducted by our research group, and by considering the cool flame in the flame spread between droplets, which has been considered only as the hot-flame spread. The results of microgravity experiments show that a cool flame appeared around a droplet existing outside the flame-spread limit, the droplet of which was heated by the flame forming around the interactive droplets. The cool flame was also observed in the flame spread of equally spaced droplet arrays, and there were different modes of cool-flame appearance depending on the droplet spacing, even when the same mode of flame spread occurred when focusing on the hot flame.

Academic Significance and Societal Importance of the Research Achievements

学術的には,微小重力場での液滴燃焼から,液滴間燃え広がりを通して,ランダム分散液滴群の燃え広がりへつなげ,最終的に噴霧燃焼へと繋げるという意義がある.特に冷炎を考慮した燃え広がり過程の理解は,複雑な反応モデルの簡略化への貢献を通して,冷炎簡略反応モデルを実装した大規模噴霧燃焼の計算コードの産業界への提供へと繋がる社会的意義がある.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (30 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (6 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (20 results) (of which Int'l Joint Research: 6 results,  Invited: 3 results)

  • [Int'l Joint Research] NASA Glenn Research Center/Case Western Reserve University/University of California, San Diego(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Sebelas Maret University(インドネシア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] NASA Glenn Research Center/Case Western Reserve University/University of California, San Diego(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Sebelas Maret University(インドネシア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] NASA Glenn Research Center/Case Western Reserve University/University of California, San Diego(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Sebelas Maret University(インドネシア)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] From Droplet Combustion toward Spray Combustion: Space-based Experiments “Group Combustion”2023

    • Author(s)
      三上 真人
    • Journal Title

      Journal of the Combustion Society of Japan

      Volume: 65 Issue: 211 Pages: 49-56

    • DOI

      10.20619/jcombsj.65.211_49

    • ISSN
      1347-1864, 2424-1687
    • Year and Date
      2023-02-15
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Appearance of cool flame in flame spread over fuel droplets in microgravity2023

    • Author(s)
      Mikami Masato、Matsumoto Kodai、Chikami Yuto、Kikuchi Masao、Dietrich Daniel L.
    • Journal Title

      Proceedings of the Combustion Institute

      Volume: 39 Issue: 2 Pages: 2449-2459

    • DOI

      10.1016/j.proci.2022.07.053

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Study on two-stage ignition of two interactive droplets in flame spread over n-decane droplets in microgravity2021

    • Author(s)
      Yuto CHIKAMI, Kodai MATSUMOTO, Takehiko SEO, Masato MIKAMI
    • Journal Title

      Proceedings of 15th International Conference of Liquid Atomization and Spray Systems

      Volume: - Issue: 1

    • DOI

      10.2218/iclass.2021.5917

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of two-droplet interaction on the group combustion excitation in randomly distributed droplet clouds using a percolation model2021

    • Author(s)
      Yuka Hara, Yuto Chikami, Takehiko Seo, Masato Mikami
    • Journal Title

      Proceedings of the 13th Asia-Pacific Conference on Combustion

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] 燃え広がり限界外の液滴の予蒸発を考慮したパーコレーションモデルを用いた液滴群の燃え広がりに関する研究2024

    • Author(s)
      年岡沙英, 坂野文菜, 三上真人
    • Organizer
      日本機械学会関西支部第99期定時総会講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 微小重力場における冷炎を考慮した液滴列の燃え広がり形態に関する研究2023

    • Author(s)
      原田真作, 松浦勇翔, 坂野文菜, 三上真人
    • Organizer
      日本マイクログラビティ応用学会 第35回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 単一アンモニア液滴の着火方法調査と微小重力場・高圧雰囲気における燃焼速度定数計測2023

    • Author(s)
      松浦勇翔, 坂野文菜, 三上真人
    • Organizer
      日本マイクログラビティ応用学会 第35回学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 微小重力・高圧環境下におけ る単一アンモニア液滴の燃焼後期の非定常現象の調査2023

    • Author(s)
      松浦勇翔, 坂野文菜, 三上真人
    • Organizer
      第61回燃焼シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Appearance of cool flame in flame spread over fuel droplets in microgravity2022

    • Author(s)
      Masato MIKAMI, Kodai MATSUMOTO, Yuto CHIKAMI, Masao KIKUCHI, Daniel L. DIETRICH
    • Organizer
      39th International Symposium on Combustion
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 微小重力場を用いた室温高圧雰囲気中での単一アンモニア液滴の蒸発速度定数計測2022

    • Author(s)
      松浦勇翔, 原侑花, 三上真人
    • Organizer
      日本マイクログラビティ応用学会第34回学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ISSでの液滴群燃焼実験Group CombustionからGroup Combustion-2へ ~燃え広がりにおける冷炎発生とその影響~2022

    • Author(s)
      三上真人, 野村浩司, 渡邊裕章, 菅沼祐介, 菊池政雄, Daniel L. Dietrich, Vedha Nayagam, Forman A. Williams
    • Organizer
      日本マイクログラビティ応用学会第34回学術講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 二液滴・三液滴干渉がランダム分散液滴群の燃え広がりに与える影響の二次元パーコレーションモデルによる調査2022

    • Author(s)
      原侑花, 三上真人, サプトロ ヘルマン
    • Organizer
      日本マイクログラビティ応用学会第34回学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effects of three-droplet interaction on the flame spread over randomly distributed droplet clouds at the critical points using a percolation model2022

    • Author(s)
      Yuka Hara, Masato Mikami, Herman Saputro
    • Organizer
      13th Asian Microgravity Symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Droplet-cloud-combustion Experiments aboard ISS, Group Combustion and Group Combustion-22022

    • Author(s)
      Masato MIKAMI, Hiroshi NOMURA, Hiroaki WATANABE, Yusuke SUGANUMA, Masao KIKUCHI, Daniel L. DIETRICH, Vedha NAYAGAM, Forman A. WILLIAMS
    • Organizer
      13th Asian Microgravity Symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高圧環境下での単一アンモニア液滴生成の実現と燃焼の試み2022

    • Author(s)
      松浦 勇翔, 原 侑花, 千頭 勇斗, 瀬尾 健彦, 三上 真人
    • Organizer
      日本機械学会第52回学生員卒業研究発表講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] “Group Combustion” - The First Combustion Experiment aboard Kibo on the ISS -2021

    • Author(s)
      Masato Mikami
    • Organizer
      国際連合宇宙部Hypergravity/Microgravity Webinar Series
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Study on two-stage ignition of two interactive droplets in flame spread over n-decane droplets in microgravity2021

    • Author(s)
      Yuto CHIKAMI, Kodai MATSUMOTO, Takehiko SEO, Masato MIKAMI
    • Organizer
      15th International Conference of Liquid Atomization and Spray Systems
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 液滴干渉がランダム分散液滴群の燃え広がりに与える影響のパーコレーションモデルによる調査2021

    • Author(s)
      原侑花, 千頭勇斗, 瀬尾健彦, 三上真人
    • Organizer
      日本マイクログラビティ応用学会 第33回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 微小重力高圧環境下での液滴間燃え広がりにおける冷炎を伴う液滴蒸発の調査2021

    • Author(s)
      千頭勇斗, 原侑花, 瀬尾健彦, 三上真人
    • Organizer
      日本マイクログラビティ応用学会 第33回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Cool Flame Burning During Flame Spread over Droplet Arrays and Clusters2021

    • Author(s)
      D.L. Dietrich, V. Nayagam, F.A. Williams, M. Mikami, H. Nomura, M. Kikuchi
    • Organizer
      日本マイクログラビティ応用学会 第33回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Group Combustion-2におけるモデリングと数値解析2021

    • Author(s)
      渡邊裕章, 三上真人, 野村浩司, 菅沼祐介, 瀬尾健彦, 菊池政雄
    • Organizer
      日本マイクログラビティ応用学会 第33回学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ISS/きぼうワークショップ 実験例紹介 ① 液滴燃焼実験2021

    • Author(s)
      三上真人
    • Organizer
      第59回燃焼シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 微小重力場での液滴間燃え広がりにおいて冷炎が大規模着火の発現に与える影響の調査2021

    • Author(s)
      千頭 勇斗, 原 侑花, 瀬尾 健彦, 三上 真人
    • Organizer
      第59回燃焼シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Effects of two-droplet interaction on the group combustion excitation in randomly distributed droplet clouds using a percolation model2021

    • Author(s)
      Yuka Hara, Yuto Chikami, Takehiko Seo, Masato Mikami
    • Organizer
      The 13th Asia-Pacific Conference on Combustion
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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