한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제23권4호
  • /
  • Pages.402-409
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  • 2015
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
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유사차원해석 모델을 이용한 초희박 조건에서의 가솔린 직분사 엔진 연소 및 배기 예측

Quasi-dimensional Analysis of Combustion and Emissions in a Stratified GDI Engine under Ultra-lean Conditions

  • 이재서 (포항공과대학교 기계공학과) ;
  • 허강열 (포항공과대학교 기계공학과) ;
  • 권혁모 (현대자동차 파워트레인열유동해석팀) ;
  • 박재인 (현대자동차 파워트레인열유동해석팀)
  • Lee, Jaeseo (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Huh, Kang Yul (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Kwon, Hyuckmo (Powertrain Thermo-Fluid CAE Team, Hyundai Motor Company) ;
  • Park, Jae In (Powertrain Thermo-Fluid CAE Team, Hyundai Motor Company)
  • 투고 : 2014.11.04
  • 심사 : 2015.03.17
  • 발행 : 2015.07.01
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초록

In this study a quasi-dimensional model is developed to predict the combustion process and emissions of a GDI engine under ultra-lean conditions. Combustion of a GDI engine condition is modeled as two simultaneous processes to consider significant fuel stratification. The first process is premixed flame propagation described as burning in a hemispherically propagating flame. The second is diffusion-controlled combustion modeled as mixing of multiple spray zones in the burned gas region. Mixing is an important factor in ultra-lean conditions leaving stratified mixture of developing sprays behind the propagating premixed flame. Sheet breakup and Hiroyasu models are applied to predict the velocity of a hollow cone spray. Validation is performed against measured pressures and NOx and CO emissions at different load and rpm conditions in the test engine.

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참고문헌

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