Influence of Vane Boundary Layer on Hydrodynamic Properties Separation in Centrifugal Pump
Zhu Yucai,Qu Yanguo,Shao Juping,Song Jingui,Cheng Beiqiang
(1 Yantai Teaching College, Yantai, 264025) (2 Qingdao University of Technology, Qingdao, 266033)

Abstract: The analytical method for fluid viscous flow near surface of vane in centrifugal pump is proposed. According to the calculation of boundary layer para meters on vane pressure surface and the judge of boundary layer separation, the vane curves of separated type and streamline type are determined. And the infl uence of vane curve on hydrodynamic properties is verified via a comparative test. It is clear that the influence exerts mainly on the aspect of hydro efficiency and dynamic property of centrifugal pump, the variation of vane shape is an i mportant factor to determine whether boundary layer separates. A remarkable sepa ration deceases testing pump performance and results in violent vibration and higher noise. The analysis to boundary layer is emphatically important for hydro design of vane. The evaluated criterion and of vane curve are presented simultan eously.
Keywords: centrifugal pump, streamline vane, boundary layer calculation, hydrody namic properties.