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이준규(Joon Kyu Lee),권혁모(Hyuck-Mo Kwon),이제형(Je-Hyung Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To optimize combustion chamber geometry a morphing method to vary the combustion bowl configuration was developed and applied to the in-cylinder 3D combustion analysis in a diesel engine. The optimization analysis procedure consists of 3 steps. The first step is the verification of the combustion analysis for the base engine using KIVA-3V code. The 2nd step is combustion bowl design and modeling by the developed morphing method. In this study 75 cases of combustion bowl shape were considered. In the final step, the combustion analysis for the full and part load engine operating conditions was carried out. By definition of the object function to reduce emission and BSFC, and to enhance engine power, the optimum combustion chamber geometry was successfully achieved.
엔진 연소해석 및 DFSS 기법을 이용한 승용디젤엔진의 연소실형상 최적화
이준규(Joon Kyu Lee),권혁모(Hyuck-Mo Kwon),이제형(Je-Hyung Lee),남기훈(Ki-Hoon Nam),김창일(Chang-Il Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
To optimize combustion chamber geometry in a passenger car diesel engine the in-cylinder 30 combustion analysis using the KIVA-3V and DFSS process were applied. The combustion analysis for the base engine was verified comparing the combustion pressure and heat release rate with the experimental data. The DFSS method was applied to minimize the emission of NOx and Soot defining the primary design parameters for the combustion chamber geometry and choosing the intake air temperature as the noise parameter. The optimized combustion chamber geometry was successfully achieved using the internally developed morphing technique for the chamber geometry and the LIS orthogonal matrix. The analytical results show the decrease of NOx and Soot emission by about 20% compared to the base combustion chamber. They were also confirmed by comparing with the experimental data.