이색 PIV 기술을 이용한 가솔린 엔진 연소실내의 유동특성에 관한 연구

It has been known that the in-cylinder flow field structure at ignition timing has an effect on the shape of initial flame. The particle image velocimetry(PIV), a planar measuring technique, is an efficient tool for studying the complicated flow field such as in-cylinder flow and intake port flow. In this study, two-color scanning PIV is designed to obtain quasi-instantaneous two-dimensional velocity data by using a rotating mirror and a beam splitter. This PIV allows the complex turbulent flow and vorticity including countercurrent like tumbling flow by using spatial filtering technique. In addition, high spatial resolution is adequate to resolve the few-mm turbulent integral length scales.