Abstract
Fluid machines for fluid food have been used in wide variety of fields i.e. transportation, the filling, and for the improvement of quality of fluid foods. However, flow conditions of it are quite complicated because fluid foods are different from water. Therefore, design methods based on internal flow conditions have not been conducted. In this research, a centrifugal pump with a small number of blades was used to decrease shear loss and keep wide flow passage. Furthermore a larger outlet angle was adopted. In this paper, the internal flow conditions at each axial cross section of centrifugal pump with four straight blades and blade outlet angle 90 degree was compared from numerical analysis results of low viscous fluids. In addition, design methods based on the internal flow were considered. Furthermore, the influences of viscosity on the performance characteristic and internal flow were investigated.
