Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of the Fuel Stratification on the Operating Range for a DME HCCI Engine based on Numerical Analysis

농도성충화가 DME HCCI 엔진의 운전 영역 확장에 미치는 영향에 관한 수치해석 연구

  • 권오석 (울산대학교 대학원 기계자동차공학부) ;
  • 정동원 (울산대학교 대학원 기계자동차공학부) ;
  • 백영순 (한국가스공사) ;
  • 임옥택 (울산대학교 기계자동차공학과)
  • Published : 2009.06.30
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Abstract

The operating range of HCCI engine is narrow due to excessive rate of pressure rise on high load. The fuel stratification is proposed to solve the problem. The purpose of this study is to gain a better understanding of the effects of fuel stratification on reducing the pressure-rise rate at high load in HCCI combustion and to investigate that the operating range is expanded for fuel stratification in the preceding condition of initial temperature and equivalence ratios. The engine is fueled with Di-Methyl Ether (DME) which has unique 2-stage heat release. The computations were conducted using SENKIN application of the CHEMKINll kinetics rate code. Calculation result shows that proper fuel stratification prolongs combustion duration and reduce pressure rise rate.

Keywords

References

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