[디젤엔진부문] 직분식 단기통 디젤엔진 실린더내 스월비 변화에 따른 유동장 계측 및 해석

This study involves several measurement techniques to analyze swirl flow in 'a four-valve HSDI 2.0L diesel engine; swirl meter measurements and LDV measurements. Flow characteristics of a four-valve cylinder head were examined in a steady test rig for different SCV angles to quantity swirl ratio. Then the measurement of swirl mean velocity and turbulence intensity have been made for motoring condition(500,800rpm) using a laser Doppler velocimetry system which was applied in backward scattering method from top-view and bottom-view. This study also analysed some parameters of swirl ratio, swirl averaging velocity. Obtained results about the optimal intake port configuration are expected to be a suitable guide line in the analysis of the swirl flow characteristics.