SI2-2: A Hybrid Fractal Flame Model for SI Engine Combustion Comprising Turbulent Dissipation and Laminar Flamelets(SI: Spark-Ignition Engine Combustion,General Session Papers)

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概要

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• A new combustion model has been introduced for the prediction of turbulent propagating combustion in SI engines. The model assumes that the flamelets consist of a turbulent dissipation part and a laminar part and is called Hybrid Fractal Flame Model (HFFM). A CFD code integrated the model and separately a pure laminar flamelet model, which was tested for comparison. Computational results were compared with measured pressures and heat release rates for several different engine speeds. It is shown that the HFFM agrees well with the measurements for 1000, 1500 and 1800 rpm, while the pure laminar flamelet model overestimates at lower engine speed and underestimates at higher engine speed. The analysis of the computed results indicates that the turbulent dissipation heat release rate contributes more to the total heat release rate as engine speed increases; from around 27% at 1000 rpm to 52% at 1800 rpm.

• 一般社団法人日本機械学会の論文
• 2008-07-28

著者

• Nishiwaki Kazuie

  Research Organization Of Science And Engineering Ritsumeikan University

関連論文

• SI2-2: A Hybrid Fractal Flame Model for SI Engine Combustion Comprising Turbulent Dissipation and Laminar Flamelets(SI: Spark-Ignition Engine Combustion,General Session Papers)
• OS-C1: The LES Analysis of the Effect of Mixture Heterogeneity on PCCI Combustion(OS-C The Role of Heterogeneity of mixture on HCCI and PCCI Combustion,Organized Session Papers)

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