Characteristics of flow for various rotating angle in cylindrical tube

원관내 밸브 디스크 회전각의 변화에 따른 유동특성

In this paper, flow on the rear region of a butterfly valve was analysed by using numerical and experimental methods. The butterfly-valve disk angle is changed as 0-60 degree and the uniform flow velocity was fixed In this experiment. It was shown that the numerical results are similar to the experimental results. General discussions are given to the flow-pattern change upon the disk angle of the valve.