Study on Low Specific Speed Centrifugal Pump in the Range of Low Reynolds Number

Generally, a positive displacement pump is used in low specific speed. However, since the structure of the pump complicate, it is difficult to miniaturize it. So a simple and compact centrifugal pump is required, but it is difficult to make it by using general pump design method. The purpose of this study is to establish an appropriate design method in low specific speed. Then, making impellers each of which had different inlet and outlet height and thickness of vane, pump performance was examined. As a result, it was revealed that the inlet vane height of impeller influences the pump performance, but there are no relationship between the thickness of vane and the pump performance in this research.