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Study on the Flame Propagation Limit and Its Control by Turbulence

Research Project

Project/Area Number 01550177
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Thermal engineering
Research InstitutionOsaka University

Principal Investigator

KATSUKI Masashi  大阪大学, 工学部, 助教授 (20029292)

Co-Investigator(Kenkyū-buntansha) NAKABE Kazuyoshi  大阪大学, 工学部, 助手 (80164268)
MIZUTANI Yukio  大阪大学, 工学部, 教授 (80028993)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1990: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1989: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsTurbulent Combustion / Premixed Flame / Flame Propagation Limit / Lean Flammability Limit
Research Abstract

The high-load combustion is one of the recent interest in combustion technology in designing effective combustion facilities. The control of turbulent mixing and flame propagation are essencial to burn a large rate of fuel in a limited combustion space.
In the present project, we planned to elucidate the effects of turbulence on the propagation limit and the fine structure of premixed turbulent flames, and to apply the results to the control of the high-load combustion.
The following conclusions have been obtained.
1) With the increase in turbulence intensity, the fine structure of a turbulent flame changes itself from a chemistry-controlled laminar flamelet to a mixing-controlled distributed reaction zone. The structure of laminar flamelet disappear at the lean flame propagation limit when the mixture strength of the flame is decreased.
2) The flame of distributed reaction zone can be defined as a flame near extinction or a flame which lost the ability of self-propagation.
3) Initial turbulence in an approaching flow enhances the mixing and flame spread in a combustor. Initial intense turbulence is effective for the high-load combustion.
4) The initial turbulence does not contribute to the enhancement of combustion in a lean mixture near flammability limit. The excessive turbulence produces the structure of distributed reaction zone, hence the local extinction of flames.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Masashi KATSUKI: "Turbulence and Structure in Turbulent Premixed Flames (Fine Flame Structure and Its Influence on Mixing Processes)" Japan Society of Mechanical Engineers International Journal,Series II. 33. 582-590 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masashi KATSUKI: "Local Flame Structure and its Influence on Mixing Processes in Turbulent Premixed Flames" Combustion and Flame. 82. 93-105 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masashi KATSUKI: "The Effect of Turbulance on the Fine Structure and Propagation of Lean Turbulent Flames by a Hot Jet" Joint Conference of Australia/New Zealand and Japan Sections of the Combustion Institute. 157-159 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takeo TAKAHASHI: "Observation of the Distributed Reaction Zone in Turbulent Premixed Flames" Japan Society of Mechanical Engineering International Journal,Series II. 33. 349-354 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 香月 正司: "乱流予混合火炎における乱れと混合(第2報 局所火炎構造と混合に及ぼす火炎に影響)" 日本機械学会論文集. 55. 1729-1736 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 高橋 文雄: "乱流予混合火炎の分散反応領域の観察" 日本機械学会論文集. 55. 859-864 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Katsuki, M., Takahashi, T. & Mizutani, Y.: "The Effect of Turbulence on the Fine Structure and Propagation of Lean Turbulent Flames Sustained by a Hot Jet." Joint Conference of Australia/New Zealand and Japanese Sections of the Combustion Institute. 157-159 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Katsuki, M., Mizutani, Y., Yasuda, T., Kurosawa, Y., Kobayashi, K. & Takahashi, T.: "Local Flame Structure and Its Influence on the Mixing Processes in Turbulent Premixed Flames." Combustion and Flame. 82-1. 93-105 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takahashi, T., Katsuki, M. & Mizutani, Y.: "Observation of the Distributed Reaction Zone in Turbulent Premixed Flames." Japan Soc. Mech. Eng. Inst. J., Ser. II. 32-2. 349-354 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Katsuki, M., Mizutani, Y., Yasuda, T., Kurosawa, Y., Kobayashi, K. & Takahashi, T.: "Turbulence and Mixing in Turbulent Premixed Flames (Fine Flame Structure and Its Influence on Mixing Processes)." Japan Soc. Mech, Eng. Inst. J., Ser. II. 33-3. 582-590 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takahashi, T., Katsuki, M. & Mizutani, Y.: "The Effect of Turbulence on the Fine Structure of Turbulent Flames Near Lean Flammability Limit." 3rd ASME/JSME Thermal Engineering Joint Conference. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masashi KASTUKI: "Turbulence and Structure in Turbulent Premixed Flames(Fine Flame Structure and Its Influence on Mixing Processes)" Japan Society of Mechanical Engineers International Journal,Series II. 33. 582-590 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Masashi KATSUKI: "Local Flame Structure and its Influence on Mixing Processes in Turbulent Premixed Flames" Combustion and Flame. 82. 93-105 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Masashi KATSUKI: "The Effect of Turbulence on the Fine Structure and Propagation of Lean Turbulent Flames Sustained by a Hot Jet" Joint Conference of Australia/New Zealand and Japan Sections of the Combustion Institute. 157-159 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Takeo TAKAHASHI: "Observation of the Distributed Reaction Zone in Turbulent Premixed Flames" Japan Society of Mechanical Engineering International Journal,Series II. 33. 349-354 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Katsuki,T.Takahashi,Y.Mizutani: "The Effect of Turbulence on the Fine Structure and Propagation of Lean Turbulent Flames Sustained by a Hot Jet" Joint International Conference of Australia and Japannese Sections of the Combustion Institute. 157-159 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 高橋文雄,香月正司,水谷幸夫: "希薄乱流予混合火炎の微細構造と燃焼機構" 日本機械学会関西支部第65期定期総会講演概要集. (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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