정상유동 장치에서 CI 기관 유동의 특성(2): 접선형 포트

In this study, the flow characteristics of the tangential port of the CI engine are examined according to the geometrical arrangement and shape. For this purpose, the 9 ports were divided into 4 port types according to their geometric arrangement and shape. By observing the change in swirl as a function the valve lift according to the classified types, and analyzing the common characteristics of each type and the influence of shape changes applied to the port, the following results were obtained. The change in swirl due to lift is basically affected by the arrangement and macroscopic shape of the port, and the final swirl ratio is also determined by this arrangement and shape. Among the different types, the swirl ratio is highest when an reverse bend is adopted, since this shape and arrangement is suitable for inducing tangential flow along the cylinder wall.