Effect of regulating sleeve orifice chamfering on flow field and structure of high-pressure bypass valve
ZHANG Xiao1, LIU Dong1, YANG Song1, ZHANG Tianze1*, BAO Nanyu2
1. School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China;2. Suzhou Valve Doctor Fluid Control Technology Co. Ltd., Suzhou, Jiangsu 215000, China
Abstract：In order to investigate the influence of chamfer depth and angle of the regulating sleeve throttling hole on the internal flow field and structural reliability of a high-pressure bypass valve, this study conducted numerical calculations and one-way thermo-fluid-solid coupling analysis of the internal flow field of the valve. The results show that after throttling, steam will form shock waves and a series of shock wave trains that disappear at the bottom cover of the secondary throttling sleeve. In addition, the large pressure difference on both sides of the sealing surface of the annular regulating sleeve is the main cause of the sealing surface deformation. Secondly, this study aimed to reduce the deformation of the regulating sleeve sealing surface and investigated the influence of the chamfer angle and depth of the throttling hole on the flow field and sealing surface deformation. The results show that chamfering can significantly reduce the pressure difference and deformation of the sealing surface on both sides of the regulating sleeve. When the chamfer angle is 72.5°, the reduction of shape variable on both sides of the regulating sleeve is 17.06 % and 15.72 %, respectively. This study provides a basis for optimizing valve flow characteristics and reducing valve deformation.
