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Elucidation of Wall Chemical Effects on the Cool Flame Ignition and Extinction Process

Research Project

Project/Area Number 21K14088
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionThe University of Tokyo

Principal Investigator

Lee Minhyeok  東京大学, 大学院工学系研究科(工学部), 講師 (80828426)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords冷炎 / 低温酸化反応 / PLIF / TDLAS / 壁面の化学的効果 / DME / HCHO / TOF-MS / WMS / 燃焼 / エネルギー / 低環境負荷
Outline of Research at the Start

本研究では,より高効率で低環境負荷の燃焼システムの実現に向け,冷炎の着火および消炎課程における壁面の化学的効果の解明を行う.壁温の昇降により冷炎の着火と消炎がコントロールできる実験系を構築し,冷炎中の主要な中間生成物の濃度変化を計測することで,その課程を同定する.異なる壁面上における冷炎の着火・消炎挙動を比較することで,壁面の化学的効果を明らかにするとともに,冷炎に適用可能な表面反応モデルの構築を目指す.

Outline of Final Research Achievements

In this study, we systematically investigated the effects of fuel, chemical reactivity of the wall surface, and pressure on the combustion characteristics of cool flames near wall surfaces. Wall-stabilized cool flames were formed by impinging a mixture of fuel and oxidizer on a heated wall. By depositing materials of interest on the wall surface using Microelectromechanical Systems (MEMS) technology, the chemical reactivity of the wall surface was controlled. The behavior of cool flames was identified by measuring the concentration changes of HCHO molecules using PLIF and TDLAS. Additionally, simultaneous analysis of multiple chemical species was performed using TOF-MS. The results revealed the suppressive effect of metal surface reactions on low-temperature oxidation reactions, the decrease in wall chemical effects with increasing fuel carbon chain length, and the varying effects of pressure on low-temperature oxidation reactions depending on the type of fuel.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は,これまで十分に解明されていなかった壁面近傍における冷炎の燃焼特性を明らかにした.燃料,圧力,壁面材料などが冷炎に及ぼす影響に対して,系統的かつ実用的データを提供するとともに,壁面安定化冷炎という新しい実験プラットフォームを通じて冷炎現象の理解を加速させている.本研究により得られた知見は冷炎の制御の可能性を示しており,次世代型燃焼機器の開発に寄与するものでもある.

Report

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

    (15 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (12 results) (of which Int'l Joint Research: 6 results,  Invited: 1 results)

  • [Int'l Joint Research] プリンストン大学(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Investigation of Premixed Cool Flame Ignition Characteristics under Mildly-Elevated Pressures by Using TDLAS2023

    • Author(s)
      LI Gengyu、SUZUKI Yuji、LEE Minhyeok
    • Journal Title

      Journal of the Combustion Society of Japan

      Volume: 65 Issue: 213 Pages: 178-184

    • DOI

      10.20619/jcombsj.2301

    • ISSN
      1347-1864, 2424-1687
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ignition and extinction characteristics of n-alkane cool flames on a heated wall with different surface reactivity2023

    • Author(s)
      Tomotaka Mizuno、Suzuki Yuji,Lee Minhyeok
    • Journal Title

      Fuel

      Volume: - Pages: 128587-128587

    • DOI

      10.1016/j.fuel.2023.128587

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] 予混合DME冷炎の中間生成物の時間分解計測2024

    • Author(s)
      周 萌, 鈴木 雄二, 李 敏赫
    • Organizer
      第61回日本伝熱シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 壁面安定化冷炎におけるDME低温酸化反応中間生成物の計測2023

    • Author(s)
      周 萌, 鈴木 雄二, 李 敏赫
    • Organizer
      第61回燃焼シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Investigation of Pressure Effects on Cool Flame Ignition Temperature through the Gas Temperature-compensated HCHO-TDLAS Measurement2023

    • Author(s)
      M. Lee, G. Li, and Y. Suzuki
    • Organizer
      14th Asia-Pacific Conference on Combustion (ASPACC 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of Surface Reactivity and Pressure on Cool Flame Ignition Characteristics2023

    • Author(s)
      M. Lee, G. Li, T. Mizuno, and Y. Suzuki
    • Organizer
      17th International Heat Transfer Conference (IHTC-17)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] TOF-MS Measurement of Intermediate Species in Wall-stabilized Premixed Cool Flames2023

    • Author(s)
      M. Zhou, Y. Suzuki, and M. Lee
    • Organizer
      20th International Conference on Flow Dynamics (ICFD 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of Ignition Characteristics of Premixed DME Cool Flames through Time-Resolved Species Measurement2023

    • Author(s)
      M. Lee, M. Zhou, and Y. Suzuki
    • Organizer
      4th International Discussion Meeting on Chemistry and Technology of Combustion Application
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 予混合冷炎の着火特性解明のためのHCHO濃度とガス温度の同時計測2022

    • Author(s)
      李 耕宇, 李 敏赫, 鈴木 雄二
    • Organizer
      第59回日本伝熱シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] ホルムアルデヒド濃度とガス温度の同時計測による冷炎着火特性の圧力依存性の検討2022

    • Author(s)
      李 耕宇, 李 敏赫, 鈴木 雄二
    • Organizer
      第60回燃焼シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] Ignition Characteristics of Premixed Cool Flame at Elevated Pressures Investigated by TDLAS2022

    • Author(s)
      G. Li, M. Lee, Y. Suzuki
    • Organizer
      39th International Symposium on Combustion (Combustion 2022), Work-in-Progress Poster
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 直鎖アルカン予混合冷炎の着火・消炎特性に対する壁面の化学的効果2021

    • Author(s)
      水野 智貴, 李 敏赫, 鈴木 雄二
    • Organizer
      第59回燃焼シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] TDLASを用いた予混合冷炎の着火特性における圧力依存性の計測2021

    • Author(s)
      李 耕宇, 李 敏赫, 鈴木 雄二
    • Organizer
      第59回燃焼シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] Ignition and Extinction Characteristics of Wall-stabilized Premixed n-Alkane Cool Flames2021

    • Author(s)
      T. Mizuno, M. Lee, Y. Suzuki
    • Organizer
      13th Asia-Pacific Conference on Combustion (ASPACC 2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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