[論文] 吸入밸브 形狀이 吸入流動에 미치는 影響(I)-모델에 의한 軸方向速度分布-

This paper deals with the experimental study of the turbulent flow fields by the hot-wire anemometer and the density fields by the Schlieren photography. In this study, the air mixed with CO₂ was used to visualize and to study this process and experimental parameters used were valve lift and valve shape. The results obtained are as follows: I) The axial velocity of mixture flow passing a valve is changed greatly by valve seat angle and valve lift. Especially, it is changed more when the valve seat angles is 30° and 45° than when these are 60° and 90° . 2) Experimental results by hot wire anemometer and Schlieren apparatus are very close together. The most satisfactory results are shown when the valve seat angle is 45° .