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Fundamental Study on The Mechanism of Turbulent Combusiton and Its Model

Research Project

Project/Area Number 04650189
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  Osaka University, Department of Mechanical Engineering Associate Professor, 工学部, 助教授 (20029292)

Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1992: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsTurbulent Combustion / Premixed Combustion / Flame Structure / Lean Combustion / Combstion Reaction Model
Research Abstract

When we think of the world wide energy issue and the persistence of desirable circumstances, it is necessary to establish the scientific procedure to promate both the effective utilization of energy and the reduction of pollutant emissions. The elucidation of turbulent combustion mechanism and the control of combustion are essential for the purpose. One of the main objects of the present study is to obtain knowledge related to flame structures varying with the combination of various steps of reaction and turbulence intensity and to understand the interaction between combustion reaction and turbulence. Another object is to propose a combustion model based on the experiments which can be applied for the control of combustion. The following conclusions are obtained.
1) Flame structure of a turbulent flame changes from the structure of a srinkled laminar flame into that of a distributed reaction zone when the wquivalence ratioof the mixture is decreased in spite of a weak turbulence. Low Damkoler number flames fealized by shortened mixing characteristic time scale and by increased chemical characteristic time scale showed similar flame structure.
2) The fundamental feature of the propased combustion model consists of chemistry- and mixing-controlled reaction rates which vary with the local Damkoler number. The smooth time-averaged temperature profile in a typical turbulent flame can be successfully predicted by the present nodel which is dependent on the distribution of local Damkoler numbers. Since the accuracy of the model is intimately related with the local Damkoler number, hence the turbulence length scale, discussion of turbulence model inflames beeds a future study.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 高橋丈雄: "希薄乱流予混合火炎の微細構造と燃焼機構" 日本機械学会論文集 B. 58-547. 929-936 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 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3報,乱流燃焼反応モデル)" 日本機械学会論文集B. 58-551. 2261-2267 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Katsuki,Masashi: "A Unified Model of Mean Reaction Rate in Turbulent Premixed Flames" Aerothermodynamics in Combustors. 133-144 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 香月正司: "予混合火炎の微細構造に及ぼす乱れの影響" 燃焼の科学と技術. 2-1(掲載予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 安田俊彦: "乱流燃焼モデルとその影響因子の検討 〔口頭発表〕" 第20回ガスタービン定期講演会講演論文集. 33-40. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Tkahashi, Takeo: "Fine Flame Structure and Combustion Mechanism of Lean Turbulent Premixed Flames" JSME Int. J. Vol.37. 172-179 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Katsuki, Masashi: "Turbulence and Mixing in Turbulent Premixed Flames (3rd Report, Turbulent Combustion Model)" Trans. JSME. Vol.58, No.551, Ser.B. 2261-2267 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Katsuki, Masashi: "A Unified Model of Mean Reaction Rate in Turbulent Premixed Flames" Aerothermodynamics in Combustors. 133-144 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Katsuki, Masashi: "Effects of turbulence on Fine Structure of Premixed Flames" Nensho no Kagaku to Gijutsu. Vol.3, No.1, (to be published). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 香月正司: "予混合火炎の微細構造に及ぼす乱れの影響" 燃焼の科学と技術. 2-1(掲載予定). (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] 高橋 丈雄,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" 日本機械学会論文集(B編). 58. 929-936 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 香月 正司,水谷 幸夫 安田 俊彦,吉田 哲之: "乱流予混合火炎における乱れと混合(第3報,乱流燃焼反応モデル)" 日本機械学会論文集(B編). 58. 2261-2267 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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