Study on Flow Characteristics for Eccentric Shaft in the Butterfly Valve System

축편심 버터플라이 밸브의 유동특성에 관한 연구

To improve the performance of the control butterfly valve seals are used to eccentric shaft. In this case, vertical opening gas of the butterfly valve is non-symmetrical, which will change the flow pattern around the valve. In this study, the eccentric drive shaft of the butterfly valve to change flow characteristics are performed numerically. Flow pattern and pressure drop are investigated as the valve opening angle increases for a given mass flow rate. The valve flow coefficient is compared to the without eccentric shaft.