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Development of Engineering Estimation Model on the Critical Condition for Ignition of Flowing Premixed Flammable Mixture by Heated Surface based on Academic Investigation

Research Project

Project/Area Number 21H01576
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 25020:Safety engineering-related
Research InstitutionSuwa University of Science

Principal Investigator

IMAMURA Tomohiko  公立諏訪東京理科大学, 工学部, 教授 (50450664)

Co-Investigator(Kenkyū-buntansha) 桑名 一徳  東京理科大学, 創域理工学研究科国際火災科学専攻, 教授 (30447429)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2023: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2022: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2021: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Keywords着火 / リスクアセスメント / 水素 / モデリング / 高温熱面 / 予混合気 / 流動 / 予測モデル / 臨界条件 / 可燃性ガス / 加熱壁面
Outline of Research at the Start

高温熱線,ホットプレート,たばこなど一定のパワーで加熱される熱面による,流動可燃性混合気の着火現象に注目した研究である。実験,数値シミュレーション,理論解析を駆使して着火時の熱流束や着火時間,着火温度を求めそのパラメータ依存性を究明し,流動する可燃性予混合気の着火の臨界条件の定量的予測を可能とする学術的モデルの構築をめざす。着火現象の成否を分ける臨界条件の支配パラメータの特定とその影響度の解明を解決すべき学術的課題に掲げた。水素やプロパン等のクリーンエネルギーのリスク管理などの安全工学分野をはじめ,予混合燃焼の広い分野に応用性,発展性の高い研究である。

Outline of Final Research Achievements

To contribute to risk assessment of next-generation fuels that contribute to carbon neutrality, we conducted a series of study aimed at developing a method for predicting the ignition of a flowing flammable premixture caused by a high-temperature hot surface. First, we performed an ignition experiment on a propane/air premixture to clarify the flow velocity dependence of the heat flux, which is the critical condition for ignition, and clarified by dimensional analysis that it is governed by the Peclet number. We extended this model to apply to hydrogen/air premixtures and confirmed good prediction results. Furthermore, we showed the possibility of detecting ignition as early as approximately 80 s by analyzing the autocorrelation coefficient of the gas phase temperature data around the hot surface over time.

Academic Significance and Societal Importance of the Research Achievements

本研究では可燃性予混合気が高温熱面に衝突した場合に,着火に至る臨界条件を予測できる学術的モデルの構築に取り組んだ。着火に至る熱流束および着火温度を有次元の形で予測できるモデルを次元解析により構築し,これが燃料種によらず適用可能であることを示した。さらに,温度の自己相関係数の経時変化から着火を予測できる可能性を見出した。これらはこれまで明らかにされていなかった事項であり,学術的に大きな価値がある。これらの知見は今後の脱炭素エネルギーの社会実装に向けたリスク評価手法として幅広く応用可能である。この点に本研究の社会的意義があると確信する。

Report

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

    (24 results)

All 2024 2023 2022 2021 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (19 results) (of which Int'l Joint Research: 5 results) Remarks (1 results)

  • [Journal Article] Critical ignition conditions for propane/air premixtures impinging on electric heated surfaces: An experimental study2023

    • Author(s)
      Tomohiko Imamura, Haruki Sakuma, Masato Nakazawa, Kazunori Kuwana
    • Journal Title

      Fire Safety Journal

      Volume: 140 Pages: 103897-103897

    • DOI

      10.1016/j.firesaf.2023.103897

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Relationship between Transient Characteristics of Burning Velocity Just After Ignition and Quenching Distance2023

    • Author(s)
      Jun-ichi Suematsu, Tomohiko Imamura
    • Journal Title

      Proceedings of ICDERS2023

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 低流速で流動するプロパン/空気予混合気の消炎距離2022

    • Author(s)
      今村友彦,末松潤一,柳弘也
    • Journal Title

      安全工学

      Volume: 61

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Critical Condition of Ignition for a Stagnation Flow of Premixed Propane/Air Mixture Impinging to a Heated Surface2021

    • Author(s)
      Tomohiko Imamura, Sensho Oh, Yasuyuki Maejima, Yudai Suzuki, Norikazu Takeda, Masato Nakazawa, Kazunori Kuwana
    • Journal Title

      Proceedings of 12th Asia-Oceania Symposium on Fire Science and Technology (AOSFST2021)

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] 可燃性予混合気の熱面着火現象の早期検知手法2024

    • Author(s)
      今村 友彦,遠藤 剛,ティンナコンスチブト ニシャリー,桑名一徳
    • Organizer
      2024年度日本火災学会研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 流動する水素/空気予混合気の熱面着火特性2024

    • Author(s)
      山田 哲義,今村 友彦
    • Organizer
      2023年度日本機械学会北陸信越支部合同講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 異常検知手法を用いたプロパン/空気予混合気の熱面着火予測手法の確立2024

    • Author(s)
      遠藤 剛,今村 友彦
    • Organizer
      2023年度日本機械学会北陸信越支部合同講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 水平な平行平板間に生じた初期火炎核の伝播挙動2023

    • Author(s)
      末松 潤一,今村 友彦
    • Organizer
      第56回安全工学研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 流動する水素/空気予混合気の消炎距離2023

    • Author(s)
      山川 将葵,田畑 佳樹,末松 潤一,今村 友彦
    • Organizer
      第56回安全工学研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Critical ignition conditions for propane/air premixtures impinging on electric heated surfaces: An experimental study2023

    • Author(s)
      Tomohiko Imamura, Haruki Sakuma, Masato Nakazawa, Kazunori Kuwana
    • Organizer
      14th International Symposium on Fire Safety Science (IAFSS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Relationship between Transient Characteristics of Burning Velocity Just After Ignition and Quenching Distance2023

    • Author(s)
      Jun-ichi Suematsu, Tomohiko Imamura
    • Organizer
      29th The International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 平板消炎距離と着火直後の燃焼速度の時間的挙動の関係2023

    • Author(s)
      末松 潤一,今村 友彦
    • Organizer
      2023年度日本火災学会研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Critical Ignition Conditions for Propane/Air Premixtures Impi 1 nging on Electric Heated 2 Surfaces: An Experimental Study2023

    • Author(s)
      Tomohiko Imamura, Haruki Sakuma, Masato Nakazawa, Kazunori Kuwana
    • Organizer
      14th International Symposium on Fire Safety Science (IAFSS2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Relationship between Transient Characteristics of Burning Velocity Just After Ignition and Quenching Distance2023

    • Author(s)
      Jun-ichi Suematsu, Tomohiko Imamura
    • Organizer
      29th International Colloquium on the Dynamics of Explosions and Reactive Systems (ICDERS2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 平板消炎距離と着火直後の燃焼速度の時間的挙動の関係2023

    • Author(s)
      末松潤一,今村友彦
    • Organizer
      2023年度日本火災学会研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 発熱体寸法が流動するプロパン/空気予混合気の着火性に及ぼす影響2022

    • Author(s)
      佐久間晴希,中澤誠人,桑名一徳,今村友彦
    • Organizer
      第55回安全工学研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 静穏環境下における可燃性予混合気の消炎距離予測モデルの構築2022

    • Author(s)
      末松潤一,今村友彦
    • Organizer
      第60回燃焼シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 加熱壁面による可燃性予混合気の着火モデル2022

    • Author(s)
      中澤誠人,王千翔,前島康之,桑名一徳,今村友彦
    • Organizer
      2022年度日本火災学会研究発表会
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Presentation] 流動するプロパン/空気予混合気の消炎距離予測モデル2022

    • Author(s)
      末松潤一,柳弘也,今村友彦
    • Organizer
      2022年度日本火災学会研究発表会
    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Presentation] 流動プロパン/空気予混合気の消炎距離-数値シミュレーション及びPIVを用いた流れ場評価の適用-2022

    • Author(s)
      末松潤一,渡辺隆斗,今村友彦
    • Organizer
      第55回安全工学研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Critical Condition of Ignition for a Stagnation Flow of Premixed Propane/Air Mixture Impinging to a Heated Surface2021

    • Author(s)
      Tomohiko Imamura, Sensho Oh, Yasuyuki Maejima, Yudai Suzuki, Norikazu Takeda, Masato Nakazawa, Kazunori Kuwana
    • Organizer
      12th Asia-Oceania Symposium on Fire Science and Technology (AOSFST2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 加熱壁面に衝突するプロパン/空気予混合気の着火挙動2021

    • Author(s)
      中澤誠人,王千翔,前島康之,桑名一徳,今村友彦
    • Organizer
      第59回燃焼シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 可燃性予混合気の熱面着火時間の相似則2021

    • Author(s)
      桑名一徳,伊藤良馬,今村友彦
    • Organizer
      実験力学会2021年度年次講演会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 公立諏訪東京理科大学今村研究室ホームページ

    • URL

      https://imamura-lab.labby.jp/

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report

URL: 

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

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