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Study on coupling mechanism of acoustic vibration and propagating premixed flame by using laser irradiation method

Research Project

Project/Area Number 18H03755
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 InstitutionHokkaido University

Principal Investigator

藤田 修  北海道大学, 工学研究院, 教授 (10183930)

Co-Investigator(Kenkyū-buntansha) 橋本 望  北海道大学, 工学研究院, 准教授 (70392751)
Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥44,460,000 (Direct Cost: ¥34,200,000、Indirect Cost: ¥10,260,000)
Fiscal Year 2021: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2020: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2019: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2018: ¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Keywords燃焼振動 / 予混合火炎 / 燃焼速度 / 音響モード / ガスタービン / アンモニア燃焼 / Parametric Instability / アンモニア / ルイス数 / Pressure coupling / Velocity coupling
Outline of Annual Research Achievements

本年度は、再生可能エネルギー由来の燃料として期待されるNH3に重点を置いた研究を進め、以下の3つの項目について成果を得た。
(1)管内伝播火炎の燃焼振動発生におよぼす代替燃料の混入割合の影響:再生可能エネルギー由来の燃料として期待されるNH3を選択し、その代替率と不安定性が発現する限界条件の関係を実験的に取得した。この結果、混合燃料(NH3とCH4の混合)中のNH3比率に対する不安定性の変化を特定の当量比について取得し、NH3の混合割合が増加すると燃焼振動の発生限界が拡大することを示した。また、この結果について考察を行い、NH3による燃料代替率が上昇するとルイス数が低下することが大きな影響を与えている可能性を指摘した。また、NH3を混入すると伝播管内で不安定性の増幅する火炎位置が変化するという結果が得られており、Pressure Couplingの不安定性への寄与を考慮する必要性を示した。
(2)平面火炎の圧力変動に対する不安定現象発現時の火炎構造の観察:従来から炭化水素燃料を対象として行ってきた、平面火炎に現れるParametric Instability発生時の詳細構造をNH3火炎を対象として観察し、炭化水素を燃料とした場合と比較を行った。この結果、火炎面に現れるセル構造の波数や発光強度の時間変化は両者で異なり、反応過程で生じる中間生成物(H2や活性化学種)を含めた拡散係数を考慮した不安定性の議論が必要であることを示した。
(3)変形を与えた火炎の不安定性の観察:これまでの研究で確立してきたレーザ照射法により、変形させた火炎の圧力変動の増幅率や不安定性の発生限界をNH3/C2H4混合燃料に対して調べた。この結果、火炎変形はNH3混合燃料の場合でも圧力増幅率を増加させ、Velocity couplingは依然として燃焼振動を発生させる重要な機構の一つであることが示された。また、純粋な炭化水素燃料と比較すると(1)でも述べたとおりNH3の混入が不安定性を増加させるという結果が得られた。

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

Report

(4 results)
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(30 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 8 results,  Open Access: 1 results) Presentation (17 results) (of which Int'l Joint Research: 8 results) Remarks (4 results)

  • [Int'l Joint Research] Indian Institute of Technology Roorkee(インド)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Acoustic parametric instability, its suppression and a beating instability in a mesoscale combustion tube2021

    • Author(s)
      Dubey Ajit Kumar、Koyama Yoichiro、Hashimoto Nozomu、Fujita Osamu
    • Journal Title

      Combustion and Flame

      Volume: 228 Pages: 277-291

    • DOI

      10.1016/j.combustflame.2021.02.006

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of flame surface area of downward propagating flames induced by single and double laser irradiation on transition to parametric instability2021

    • Author(s)
      Nguyen T.G. Tri, Ajit K. Dubey, Nozomu Hashimoto, Osamu Fujita
    • Journal Title

      Combustion and Flame

      Volume: 223 Pages: 450-459

    • DOI

      10.1016/j.combustflame.2020.10.026

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Exploring a critical diameter for thermo-acoustic instability of downward propagating flames in tubes2021

    • Author(s)
      Ajit Kumar Dubey, Yoichiro Koyama, Nozomu Hashimoto, Osamu Fujita
    • Journal Title

      Proceedings of the Combustion Institute

      Volume: 38 Pages: 1945-1954

    • DOI

      10.1016/j.proci.2020.06.018

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Range of “complete” instability of flat flames propagating downward in the acoustic field in combustion tube: Lewis number effect2020

    • Author(s)
      Dubey Ajit K.、Koyama Yoichiro、Yoon Sung Hwan、Hashimoto Nozomu、Fujita Osamu
    • Journal Title

      Combustion and Flame

      Volume: 216 Pages: 326-337

    • DOI

      10.1016/j.combustflame.2020.03.003

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Experimental and theoretical study of secondary acoustic instability of downward propagating flames: Higher modes and growth rates2019

    • Author(s)
      Dubey Ajit K.、Koyama Yoichiro、Hashimoto Nozomu、Fujita Osamu
    • Journal Title

      Combustion and Flame

      Volume: 205 Pages: 316-326

    • DOI

      10.1016/j.combustflame.2019.04.010

    • NAID

      120007098302

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Blowout of non-premixed turbulent jet flames with coflow under microgravity condition2019

    • Author(s)
      Wang Qiang、Hu Longhua、Wang Shaoming、Wang Shuangfeng、Chung Suk Ho、Fujita Osamu
    • Journal Title

      Combustion and Flame

      Volume: 210 Pages: 315-323

    • DOI

      10.1016/j.combustflame.2019.08.041

    • NAID

      120007173930

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effect of Le on criteria of transition to secondary acoustic instability of downward-propagating flame in a tube with controlled curvature induced by external laser2019

    • Author(s)
      Chung Yongho, Osamu Fujita. Nozomu Hashimoto
    • Journal Title

      Proceedings of the Combustion Institute

      Volume: 37 Pages: 1887-1894

    • DOI

      10.1016/j.proci.2018.06.159

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of geometrical parameters on thermo-acoustic instability of downward propagating flames in tubes2019

    • Author(s)
      Ajit KumarDubey, KoyamaYoichiro, HashimotoNozomu, FujitaOsamu
    • Journal Title

      Proceedings of the Combustion Institute

      Volume: 37 Pages: 1869-1877

    • DOI

      10.1016/j.proci.2018.06.155

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Experimental Study On Partial Replacement Of Nh3 Into Fuel On Combustion Instability Of downward-Propagating Premixed Ch4/O2/N2 Flames2021

    • Author(s)
      Binti Rajii A.N., Hashimoto N., Fujita O.
    • Organizer
      13th Asia-Pacific Conference on Combustion
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comparative theoretical study of thermoacoustic instability with single and twin flames in closed tubes2020

    • Author(s)
      Ajit Kumar Dubey, Youhi Morii, Hisashi Nakamura, Osamu Fujita, Kaoru Maruta
    • Organizer
      第58回燃焼シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Experimental investigation on the transition to parametric instability of downward propagating flames induced by single and double laser irradiation,2020

    • Author(s)
      Nguyen Truong Gia Tri, Nozomu Hashimoto, Osamu Fujita
    • Organizer
      第58回燃焼シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] アンモニア予混合火炎の伝播管内における燃焼振動の観察2020

    • Author(s)
      角川 新, 橋本 望, 藤田 修
    • Organizer
      第58回燃焼シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 音響学的振動にさらされた管内下方伝播予混合火炎の二次不安定性発生時に現れるセル構造の観察2020

    • Author(s)
      金森 拓,橋本 望, 藤田 修
    • Organizer
      第58回燃焼シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Thermoacoustic Instability of Downward Propagating Flames in a Small Diameter Tube2019

    • Author(s)
      Ajit Kumar Dubey, Yoichiro Koyama, Nozomu Hashimoto, Osamu Fujita
    • Organizer
      The Second Pacific Rim Thermal Engineering Conference (PRTEC-2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental Study on Secondary Acoustic Instability in Downward-Propagating Flames in a Tube2019

    • Author(s)
      Juwon Park, Sung Hwan Yoon, Heejae Kim, Jae-Hyuk Choi, Kang-Woo Chun, Osamu Fujita,
    • Organizer
      12th Asia-Pacific Conference on Combustion (ASPACC2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Le on Transition to Parametric Instability in Downward Propagating Flames2019

    • Author(s)
      Ajit Kumar Dubey, Yoichiro Koyama, Sung Hwan Yoon, Nozomu Hashimoto, Osamu Fujita
    • Organizer
      12th Asia-Pacific Conference on Combustion (ASPACC2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental Comparison on Transition Criteria to Parametric Instability of a Downward-propagating Flame in a Tube Induced by Single Laser Irradiation and Double Laser Irradiation2019

    • Author(s)
      Nguyen Truong Gia Tri, Nozomu Hashimoto, Osamu Fujita
    • Organizer
      12th Asia-Pacific Conference on Combustion (ASPACC2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Boundary Conditions on Thermo-Acoustic Instability of Flames Propagating in Tubes2019

    • Author(s)
      Ajit Dubey,Osamu Fujita,Yoichiro Koyama,Nozomu Hashimoto
    • Organizer
      27th International Colloquium on the Dynamics of Explosions and Reactive Systems (27th ICDERS)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Critical diameter for thermo-acoustic stability of downward propagating flames in tubes2019

    • Author(s)
      Ajit Dubey,Yoichiro Koyama,Nozomu Hashimoto,Osamu Fujita
    • Organizer
      第57回燃焼シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Effect of Boundary Conditions on Thermo-Acoustic Instability of Flames Propagating in Tubes2019

    • Author(s)
      Ajit Dubey,Osamu Fujita,Yoichiro Koyama,Nozomu Hashimoto
    • Organizer
      27th International Colloquium on the Dynamics of Explosions and Reactive Systems
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental observation of parametric instability of downward propagating flame in combustion tube under higher acoustic vibration mode2018

    • Author(s)
      Yoichiro Koyama, Ajit Kumar Dubey, Nozomu Hashimoto, Osamu Fujita
    • Organizer
      37th International Symposium on Combustion, Work-in-progress
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of external acoustic wave on thermo-acoustic instability of downward propagating flame2018

    • Author(s)
      Tri Truong Gia Nguyen,Nozomu Hashimoto,Osamu Fujita
    • Organizer
      第56回燃焼シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Le effect on primary acoustic instability of downward propagating flame in a tube with external laser irradiation method2018

    • Author(s)
      Yongho Chung,Nozomu Hashimoto,Osamu Fujita
    • Organizer
      第56回燃焼シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Higher Mode Parametric instability of downward propagating flames in tubes2018

    • Author(s)
      Ajit Kumar Dubey,Yoichiro Koyama,Nozomu Hashimoto,Osamu Fujita
    • Organizer
      第56回燃焼シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 管内下方伝播火炎における高次音響モードに対する パラメトリック不安定性の実験的観察2018

    • Author(s)
      小山 陽一郎, Ajit Kumar Dubey, 橋本 望, 藤田 修
    • Organizer
      日本機械学会年次大会2018年度年次大会
    • Related Report
      2018 Annual Research Report
  • [Remarks] 燃焼振動と音響学的不安定性

    • URL

      http://lsu-eng-hokudai.main.jp/project/acoustic-instability/

    • Related Report
      2021 Annual Research Report
  • [Remarks] Acoustic Instability

    • URL

      http://lsu-eng-hokudai.main.jp/project/

    • Related Report
      2020 Annual Research Report
  • [Remarks] Acoustic Instability

    • URL

      https://labs.eng.hokudai.ac.jp/labo/lsu/project/acoustic-instability/

    • Related Report
      2019 Annual Research Report
  • [Remarks] Acoustic Instability

    • URL

      http://labs.eng.hokudai.ac.jp/labo/lsu/project/acoustic-instability/

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-12-28  

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