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Elucidation of unstable combustion and construction of its AI-based sign detection for hydrogen combustion under lean-burn condition

Research Project

Project/Area Number 22H00192
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 19:Fluid engineering, thermal engineering, and related fields
Research InstitutionKyoto University

Principal Investigator

黒瀬 良一  京都大学, 工学研究科, 教授 (70371622)

Co-Investigator(Kenkyū-buntansha) PILLAI ABHISHEKLAKSHMAN  京都大学, 工学研究科, 助教 (90887332)
庄司 烈  国立研究開発法人宇宙航空研究開発機構, 航空技術部門, 研究開発員 (20833172)
立花 繁  国立研究開発法人宇宙航空研究開発機構, 航空技術部門, 上席研究開発員 (50358496)
横森 剛  慶應義塾大学, 理工学部(矢上), 教授 (90453539)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Granted (Fiscal Year 2024)
Budget Amount *help
¥43,030,000 (Direct Cost: ¥33,100,000、Indirect Cost: ¥9,930,000)
Fiscal Year 2024: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2023: ¥14,300,000 (Direct Cost: ¥11,000,000、Indirect Cost: ¥3,300,000)
Fiscal Year 2022: ¥20,930,000 (Direct Cost: ¥16,100,000、Indirect Cost: ¥4,830,000)
Keywords不安定燃焼 / 水素 / AI検知 / 計測 / 数値シミュレーション / 機械学習 / 水素燃焼
Outline of Research at the Start

近年,化石エネルギーからカーボンフリーエネルギーへの大転換が避けられない喫緊の課題となっている.水素は,その燃焼過程において二酸化炭素を全く排出しない究極のカーボンフリー燃料として,様々な燃焼装置への利用が期待されている.しかし,水素の希薄燃焼は,装置損傷の原因となる不安定燃焼を引き起こすリスクがある.そこで,本研究では,不安定燃焼として特に問題視されている燃焼振動とフラッシュバックに着目し,精巧な実験と高精度の数値解析により,これらの発生メカニズムと詳細特性を明らかにする.また,不安定燃焼の事前察知・抑制を目指し,不安定燃焼が発生する予兆の検知をAIとの連携により実現する技術を構築する.

Outline of Annual Research Achievements

【実験】(Ⅰ)単缶燃焼器:2022年度に構築したフラッシュバック観測用燃焼器を使用して,バルク流速15m/s,当量比約0.63の水素-空気希薄予混合火炎に対して,フラッシュバック発生前後における燃焼器内変動圧,OH*自発光画像,流速場(PIV)の高時間分解能同時計測を実施した.その結果,弱旋回燃焼器においては,燃焼器中心軸周辺付近の軸方向流速が比較的低速な領域を選びながらフラッシュバックが進行することを実験的に初めて確認した.(Ⅱ)アニュラ燃焼器:2022年度より広い試験条件において,圧力変動計測を実施した.その結果,周波数約1300Hz,片側振幅約15~20Paの周方向モード圧力変動が,現時点で得られる最大の圧力変動であることがわかった.そこで,より強い圧力変動を実現するために,燃焼器の設計変更を行った.また,燃焼器外壁にラウドスピーカーを設置し,強制振動を発生できるようにした.予備試験の結果,周波数約900~1200Hzにおいて,最大片側振幅約700Paの1次周方向モード及び最大片側振幅約400Paの2次周方向モードの圧力変動(2022年度の約20倍)を確認した.
【数値計算】実験と同じ条件で単缶燃焼器およびアニュラ燃焼器内乱流燃焼場のLESを実施した.この結果,単缶燃焼器内のLESにおいて,当量比がフラッシュバック速度に及ぼす影響を再現することに成功した.また,火炎面の曲率分布や火炎表面積の時間変化を明らかにした.一方,アニュラ燃焼器内のLESでは,実験と同様に圧力変動が弱く,この条件下では燃焼振動を発生させることができないことを確認した.そこで,強制振動を与えた燃焼器内の音響計算を行うことによって,その音響モードを明らかにした.さらに,単缶燃焼器内で起こるフラッシュバックおよび燃焼振動の機械学習(サポートベクトルマシーンを用いた手法)による検知の可能性を見出した.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

単缶燃焼器内のフラッシュバック,およびアニュラ燃焼器内の燃焼振動の調査に関して,実験,計算ともに予定通り順調に進んでいる.特に,フラッシュバックについては,世界初の成果も出てきている.一方で,アニュラ燃焼器の燃焼振動が想定よりも弱いという問題が発生している.これについては,様々な方策を検討中であり,2024年度の早々には解決される予定である.

Strategy for Future Research Activity

【実験】(Ⅰ)単缶燃焼器:バルク流速10~25m/sの流速範囲におけるフラッシュバックの高時間分解能光学計測を継続し,フラッシュバックの発生メカニズムをより詳細に調べる.そのために,フラッシュバックの観測を行う石英管部でのレーザー光の反射を低減する措置を講じることで,より広い視野において流速分布と火炎挙動を取得する.(Ⅱ) アニュラ燃焼器:2023年度に修正した装置を用いて,バルク流速4~8m/s程度,当量比0.25~0.5程度,燃焼器内壁高さ150~450mm(内壁外径140mm),外壁高さ150~450mm(外壁内径250mm)の広い試験条件において燃焼試験を実施し,強い圧力変動が発生する条件を調べる.強い圧力変動が発生する条件に対して①燃焼器内変動圧,②OH*自発光画像,③流速場,④燃焼器外側の音圧レベルの高時間分解能同時計測を行う.また、ラウドスピーカーを用いた強制振動試験を行い,異なる周波数や燃焼振動モードにおける圧力変動や火炎挙動の特性の違いを調査する.
【数値解析】単缶燃焼器内のフラッシュバックのLESについては,燃焼振動とフラッシュバックの関連性をより詳しく調べる.また,アニュラ燃焼器内の燃焼振動については,実験で強い自励振動を発生させることができればその条件下でLESを実施し,LESの有効性を調べるとともに,燃焼振動メカニズムの詳しい調査を行う.また,強制振動を与えた場合の燃焼振動のLESも実施し,自励振動燃焼メカニズムとの違いを明らかにする.

Report

(3 results)
  • 2023 Annual Research Report
  • 2022 Comments on the Screening Results   Annual Research Report
  • Research Products

    (40 results)

All 2024 2023 2022 Other

All Journal Article (14 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 12 results,  Open Access: 4 results) Presentation (25 results) (of which Int'l Joint Research: 14 results,  Invited: 4 results) Remarks (1 results)

  • [Journal Article] A study on precise estimation of laminar burning velocity of lean hydrogen-air premixed flame (Effect of species diffusion models)2024

    • Author(s)
      KAI Reo、WATANABE Hiroaki、KUROSE Ryoichi
    • Journal Title

      Mechanical Engineering Journal

      Volume: 11 Issue: 2 Pages: 23-00400-23-00400

    • DOI

      10.1299/mej.23-00400

    • ISSN
      2187-9745
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Effects of preferential diffusion and flame stretch on FGM method for numerical simulations of ammonia/air premixed combustion2024

    • Author(s)
      Kai Reo、Ayukawa Shinya、Kinuta Kazuhiro、Kurose Ryoichi
    • Journal Title

      Applications in Energy and Combustion Science

      Volume: 17 Pages: 100253-100253

    • DOI

      10.1016/j.jaecs.2024.100253

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A new semi-implicit pressure-based solver considering real gas effect2024

    • Author(s)
      Wada Sho、Kai Reo、Kurose Ryoichi
    • Journal Title

      Journal of Computational Physics

      Volume: 501 Pages: 112782-112782

    • DOI

      10.1016/j.jcp.2024.112782

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 燃焼数値シミュレーションの現状と展望2024

    • Author(s)
      黒瀬良一
    • Journal Title

      工業加熱

      Volume: 61 Pages: 12-18

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Large-eddy simulation of a lean-premixed hydrogen flame in a low-swirl combustor under combustion instability2023

    • Author(s)
      Nagao Jun、Pillai Abhishek Lakshman、Shoji Takeshi、Tachibana Shigeru、Yokomori Takeshi、Kurose Ryoichi
    • Journal Title

      Physics of Fluids

      Volume: 35 Issue: 10 Pages: 105124-105124

    • DOI

      10.1063/5.0166412

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] LES study on the breakup mechanism of LOX core in LOX/GH2 supercritical combustion2023

    • Author(s)
      Wada Sho、Kai Reo、Kurose Ryoichi
    • Journal Title

      Proceedings of the Combustion Institute

      Volume: 39 Issue: 2 Pages: 2737-2745

    • DOI

      10.1016/j.proci.2022.07.208

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] LES Study of stabilization mechanism in lifted ethanol spray flames2023

    • Author(s)
      Hu Yong、Kai Reo、Wen Jian、Murakami Taichi、Jiang Yong、Kurose Ryoichi
    • Journal Title

      Proceedings of the Combustion Institute

      Volume: 39 Issue: 2 Pages: 2609-2620

    • DOI

      10.1016/j.proci.2022.07.127

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct numerical simulation of detonation?turbulence interaction in hydrogen/oxygen/argon mixtures with a detailed chemistry2023

    • Author(s)
      Iwata Kazuya、Suzuki Sou、Kai Reo、Kurose Ryoichi
    • Journal Title

      Physics of Fluids

      Volume: 35 Issue: 4 Pages: 046107-046107

    • DOI

      10.1063/5.0144624

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] LES flamelet modeling of hydrogen combustion considering preferential diffusion effect2023

    • Author(s)
      Kai Reo、Tokuoka Taiki、Nagao Jun、Pillai Abhishek Lakshman、Kurose Ryoichi
    • Journal Title

      International Journal of Hydrogen Energy

      Volume: 48 Issue: 29 Pages: 11086-11101

    • DOI

      10.1016/j.ijhydene.2022.12.164

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flame self-interaction during turbulent boundary layer flashback of hydrogen-rich premixed combustion2023

    • Author(s)
      Ahmed Umair、Malkeson Sean P.、Pillai Abhishek L.、Chakraborty Nilanjan、Kurose Ryoichi
    • Journal Title

      Physical Review Fluids

      Volume: 8 Issue: 2 Pages: 023202-023202

    • DOI

      10.1103/physrevfluids.8.023202

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical investigation of wall effects on combustion noise from a lean-premixed hydrogen/air low-swirl flame2023

    • Author(s)
      Nagao Jun、Pillai Abhishek Lakshman、Shoji Takeshi、Tachibana Shigeru、Yokomori Takeshi、Kurose Ryoichi
    • Journal Title

      Physics of Fluids

      Volume: 35 Issue: 1 Pages: 014109-014109

    • DOI

      10.1063/5.0131974

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 燃焼数値シミュレーションの高度化を目指して2023

    • Author(s)
      黒瀬良一
    • Journal Title

      日本ガスタービン学会誌

      Volume: 41 Pages: 336-339

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Investigation of combustion noise generated by an open lean-premixed H2/air low-swirl flame using the hybrid LES/APE-RF framework2022

    • Author(s)
      Pillai Abhishek Lakshman、Inoue Shimpei、Shoji Takeshi、Tachibana Shigeru、Yokomori Takeshi、Kurose Ryoichi
    • Journal Title

      Combustion and Flame

      Volume: 245 Pages: 112360-112360

    • DOI

      10.1016/j.combustflame.2022.112360

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Analysis of the Evolution of the Surface Density Function During Premixed V-Shaped Flame-Wall Interaction in a Turbulent Channel Flow at Ret = 3952022

    • Author(s)
      Kai Reo、Pillai Abhishek Lakshman、Ahmed Umair、Chakraborty Nilanjan、Kurose Ryoichi
    • Journal Title

      Combustion Science and Technology

      Volume: - Issue: 1 Pages: 32-58

    • DOI

      10.1080/00102202.2022.2150971

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 燃焼数値シミュレーションの現状とカーボンニュートラル社会の実現に向けた今後の役割2024

    • Author(s)
      黒瀬良一
    • Organizer
      自動車技術会「「AI・CN時代の計測・CFD技術の新展開」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 燃焼数値シミュレーションの基礎,現状,そして今後の展望2024

    • Author(s)
      黒瀬良一
    • Organizer
      日本ガスタービン学会 第52回ガスタ-ビンセミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Applicability of a semi-implicit pressure-based algorithm without spurious pressure oscillations to real fluid flows2023

    • Author(s)
      S. Wada, R. Kai, A. L. Pillai, R. Kurose
    • Organizer
      76th Annual Meeting of the American Physical Society’s Division of Fluid Dynamics (APS DFD)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analysis of noise from a transcritical N2 jet using a hybrid CFD/CAA solver for simulating real fluid flows2023

    • Author(s)
      A. L. Pillai, S. Wada, T. Yamada, R. Kurose
    • Organizer
      76th Annual Meeting of the American Physical Society’s Division of Fluid Dynamics (APS DFD)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical investigation of combustion instability and flashback of lean-premixed low-swirl hydrogen jet flame2023

    • Author(s)
      M. Kawai, J. Nagao, A. L. Pillai, R. Kurose
    • Organizer
      76th Annual Meeting of the American Physical Society’s Division of Fluid Dynamics (APS DFD)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Application of FGM method considering preferential diffusion and flame stretch to a cylindrical propagating hydrogen flame2023

    • Author(s)
      K. Kinuta, R. Kai, R. Kurose
    • Organizer
      The 29th International Colloquium on the Dynamics of Explosions and Ractive systems (ICDERS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Linearly Increased Equivalence Ratio on Combustion Instability of Lean-Premixed Low-Swirl Hydrogen Jet Flame2023

    • Author(s)
      M. Kawai, J. Nagao, A. L. Pillai, R. Kurose
    • Organizer
      The 29th International Colloquium on the Dynamics of Explosions and Ractive systems (ICDERS2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of non-spurious pressure oscillation semi-implicit pressure-based scheme for real gas flows2023

    • Author(s)
      S. Wada, R. Kai, R. Kurose
    • Organizer
      ASME-JSME-KSME Joint Fluids Engineering Conference 2023/AJK FED2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Flame-flow dynamic behavior at mode transition during combustion instability in lean premixed low-swirl hydrogen-methane turbulent flames2023

    • Author(s)
      T. Shoji, R. Fujii, J. Masugi, K. Horikawa, S. Tachibana, T. Yokomori
    • Organizer
      14th Asian-Pacific Conference on Combustion
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lewis number effect for lean premixed H2-air and CH4-air flames during combustion instability in a low-swirl combustor2023

    • Author(s)
      J. Masugi, T. Shoji, Y. Nakazumi, R. Fujii, T. Tomidokoro,S. Tachibana, T. Yokomori
    • Organizer
      14th Asian-Pacific Conference on Combustion
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of aerodynamic weber number effect on atomization and evaporation processes in crossflow2023

    • Author(s)
      K. Kitada, A. L. Pillai, R. Kurose
    • Organizer
      The 11th International Conference on Multiphase Flow (ICMF2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 層流境界層における水素-空気予混合火炎フラッシュバックの数値解析 -流路形状が及ぼす影響-2023

    • Author(s)
      矢田晃太郎, 甲斐玲央, 黒瀬良一
    • Organizer
      第61回燃焼シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 弱旋回燃焼器における水素空気予混合気火炎の逆火当量比と流入混合気流速の特性2023

    • Author(s)
      馬杉寿大, 庄司 烈, 堀川健太郎, 柳田 純, 立花 繁, 横森 剛
    • Organizer
      第61回燃焼シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] AMR法を用いた弱旋回乱流希薄水素火炎のLES: 細分化手法の検討2023

    • Author(s)
      和田拓海, 長尾 順, 河合真穂, 黒瀬良一
    • Organizer
      第61回燃焼シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 水素-空気燃焼の数値シミュレーション:選択拡散・火炎伸長・熱損失効果を考慮可能なFGM法の開発2023

    • Author(s)
      衣田和弘, 甲斐玲央, 黒瀬良一
    • Organizer
      第51回日本ガスタービン学会定期講演会講演論文集
    • Related Report
      2023 Annual Research Report
  • [Presentation] 燃焼数値シミュレーションの基礎と現状2023

    • Author(s)
      黒瀬良一
    • Organizer
      POWTEX 2023-国際粉体工業展大阪2023 粉じん爆発情報セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 燃焼数値シミュレーションの現状と展望 ~スーパーコンピュータ「富岳」を如何に使うか~2023

    • Author(s)
      黒瀬良一
    • Organizer
      第60回石炭科学会議
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Pressure-based semi-implicit solver considering real gas effect2023

    • Author(s)
      Sho Wada, Reo Kai, Ryoichi Kurose
    • Organizer
      The 11th Asian Joint Conference on Propulsion and Power (AJCPP2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A study on FGM method considering preferential diffusion for numerical simulation of hydrogen/air premixed flame2023

    • Author(s)
      Reo Kai, Kazuhiro Kinuta, Ryoichi Kurose
    • Organizer
      The 11th Asian Joint Conference on Propulsion and Power (AJCPP2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of increased equivalence ratio on combustion instability of premixed hydrogen flames in lowswirl combustor2023

    • Author(s)
      Jun Nagao, Maho Kawai, Abhishek L. Pillai, Ryoichi Kurose
    • Organizer
      The 11th Asian Joint Conference on Propulsion and Power (AJCPP2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of wall effects on combustion noise from a lean-premixed H2/air low-swirl flame using a hybrid LES/APE-RF approach2022

    • Author(s)
      Abhishek. L. Pillai, Jun Nagao, Takeshi Shoji, Shigeru Tachibana, Takeshi Yokomori, Ryoichi Kurose
    • Organizer
      75th Annual Meeting of the American Physical Society’s Division of Fluid Dynamics (APS DFD)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of equivalence ratio on combustion instability of a low-swirl flame under lean-hydrogen conditions2022

    • Author(s)
      Jun Nagao, Abhishek L. Pillai, Takeshi Shoji, Shigeru Tachibana, Takeshi Yokomori, Ryoichi Kurose
    • Organizer
      75th Annual Meeting of the American Physical Society’s Division of Fluid Dynamics (APS DFD)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水素拡散火炎の数値計算への解適合格子法の適用2022

    • Author(s)
      河合真穂, 長尾 順, 黒瀬良一
    • Organizer
      第60回燃焼シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 火炎伸長を考慮したFGM-PD法を用いた希薄水素球状伝播火炎の数値解析2022

    • Author(s)
      衣田和弘, 甲斐怜央, 黒瀬良一
    • Organizer
      第60回燃焼シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 当量比が希薄水素乱流予混合弱旋回燃焼器内における燃焼振動に与える影響2022

    • Author(s)
      長尾 順, Abhishek L. Pillai, 庄司 烈, 立花 繁, 横森 剛, 黒瀬良一
    • Organizer
      第50回日本ガスタービン学会定期講演会
    • Related Report
      2022 Annual Research Report
  • [Remarks] 京都大学熱物理工学(黒瀬)研究室

    • URL

      http://www.tse.me.kyoto-u.ac.jp/

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report

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Published: 2022-04-19   Modified: 2024-12-25  

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