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김후중(H.J. Kim),김용모(Y.M. Kim),안국영(K.Y. Ahn) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
An axisymmetric laminar jet diffusion flame has been numerically modelled. The present employs the refined physical submodels to account for the detailed chemical kinetics and the variable transport properties. It is found that preferential diffusion for heat and species significantly influences the hydrogen diffusion flame structure. The preferential diffusion effects on the diffusion flame in the high-pressure environment are also investigated.<br/>
김용모(Y.M.Kim),권영동(Y.D.Kwon),김후중(H.J.Kim),김세원(S.W.Kim) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
The autoignition and combustion processes of a diesel spray are numerically studied. To simulate the autoignition and the combustion process in a diesel spray, the wave instability breakup model, the Shell ignition model, and the modified eddy breakup model are implemented in the KIVA-Ⅱ code. The coupling mechanism between fluid mechanics and chemical reaction associated with autoignition is discussed in detail. Numerical results indicate that the mixing process along the edges of spray jet has a crucial role for autoignition and combustion process. We also investigate effects of injection pressure and concentration of O₂ and CO₂ on the autoignition process in the diesel/EGR environment.<br/>
김용모(Y. M. Kim),권영동(Y. D. Kwon),김후중(H. J. Kim),김세원(S. W. Kim) 한국자동차공학회 1997 한국 자동차공학회논문집 Vol.5 No.1
The present study is mainly motivated to numerically simulate the auto ignition and combustion process of a diesel spray in RCM and effects of design parameters on combustion and engine performance in the DI diesel engine using EGR. In case of the burning spray in RCM, special emphasis is given to the auto ignition process coupled with the fluid mechanics and chemical reaction. Computations are carried out for a wide range of 'operating condition in terms of temperature, concentration of oxygen and carbon dioxide of the intake gas in the DI diesel engine. Numerical results indicate that the mixing process along the edges of spray jet has a crucial role for autoigni-tion and combustion process. Temperature and concentration of O₂ and CO₂ of intake gas significantly influence the combustion characteristics and engine performance in the diesel/EGR environment.