Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Prediction Modeling of Unburned Hydrocarbon Oxidation in the Exhaust Port of a Propane-Fueled SI Engine

프로판 엔진의 배기 포트에서 탄화수소 산화 예측을 위한 모델링

  • 이형승 (회원, 서울대학교 정밀기계설계 공동연구소) ;
  • 박종범 (회원, 서울대학교 정밀기계설계 공동연구소) ;
  • 최회명 (회원, 서울대학교 대학원) ;
  • 민경덕 (회원, 서울대학교 기계항공공학부) ;
  • 김응서 (회원, 서울대학교 기계학공공학부)
  • Published : 2000.03.01
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Abstract

In order to investigate the exhaust structure and secondary oxidation of unburned hydrocarbon (HC) in the exhaust port, a numerical simulation was performed with 3-dimensional flow model and oxidation mechanism optimized for port oxidation. To predict the exhaust and oxidation process with consideration of flow, mixing, and temperature, 3-dimensional flow model and HC oxidation model were used with a commercial computational program, STAR-CD. The flow model were with moving grid for valve motion, which could predict the change of flow field with respect to valve lift. Optimization was performed to predict the HC oxidation with temperature range of 1200~1500K, low HC and oxygen concentration, existence of intermediate species, as typical in port oxidation. The constructed model could predict the port oxidation process with oxidation degree of 14~48% according to the engine operation conditions.

Keywords

References

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