Effects of Fluid Viscosity on the Flow in the Impeller of Centrifugal Type Hydraulic Machinery

Abstract

This paper deals with the effects of fluid viscosity on the performance and pressure distribution along the vane surfaces of the impeller of centrifugal type hydraulic machinery. The viscosity of water was changed by adding glycerin. An impeller with 6 vanes, vane angle 30° and inner-outer radii ratio 0.6, was rotated in the solution of glycerin mentioned above, and then the head, flow quantity and the pressure distribution along the surface of the vane were measured.