Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Numerical Study on Stratified Charge Formation and Combustion Processes

성층급기 연소현상에 관한 수치적 연구

  • Lee, Suk-Young (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Huh, Kang-Y. (Department of Mechanical Engineering, Pohang University of Science and Technology)
  • 이석영 (포항공과대학교 기계공학과) ;
  • 허강열 (포항공과대학교 기계공학과)
  • Published : 2007.09.01
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Abstract

A direct-injection stratified-charge(DISC) engine has been considered as a promising alternative in spite of high unburned hydrocarbon emission levels during light load operation. In this paper investigation is made to characterize formation and combustion processes of stratified mixture charge in a simple constant volume combustion chamber. Both experimental and numerical analyses are performed for fluid and combustion characteristics with 3 different induction types for rich, homogeneous and lean mixture conditions. The commercial code FIRE is applied to the turbulent combustion process in terms of measured and calculated pressure traces and calculated distributions of mean temperature, OH radical and reaction rate. It turns out that the highest combustion rate occurs for the rich state condition at the spark ignition location due to existence of stoichiometric mixture and timing.

Keywords

References

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