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 and the model was focused on larger outlet angle. In this paper, the influence of blade outlet angle on performances and internal flow conditions of centrifugal pump with four backward blades and blade outlet angle 60.6 degree was clarified from experimental and 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. The fluid food in the viscosity range used in this research corresponded to a comparatively low viscous fluid food such as beer, sake, and soy sauce.
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