http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
PTV 시스템을 이용한 가솔린 기관의 실린더내 정상 유동 해석
이창식(C.S. Lee),이기형(K.H. Lee),전문수(M.S. Chon),임경수(K.S. Im) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
Analysis and control of intake charge motion such as swirl and tumble are very important factors in improving the gasoline engine performance. In this work, the flow visualization technique and single-frame PTV(particle tracking velocimetry) are use to the steady flow test bench with 4-valve and pent-roof combustion chamber. Tumble pattern is visualized and quantified in accordance with valve lift and blockage ratio of TIV(tumble intensifying valve) and also the TIV port compare with the conventional port. The view of the instantaneous 2-D velocity field gives a realistic understanding of in-cylinder flow and thus PTV has proven to be an indispensable development tools. This flow has two tumble structures, the larger one is observed under exhaust valve side and the smaller is right below the intake valve side. The more large vorticity is observed in TIV port, thus it is concluded that TIV has effects in-cylinder flow on intensified kinetic energy.<br/>