An Investigation on Occurrence of Backflow Phenomena Caused in Axial Flow Pump - Part II: Upstream Backflow

摘要

It is not possible to say that the condition of upstream backflow affect to the condition of downstream backflow and the condition of downstream backflow affects to the condition of upstream backflow. Their conditions are due to the interrelation between the geometrical shape of impeller blades and the average velocity across the flow passage between impeller blades in the rotating flow passage of axial flow pump. Because internal flow condition is formed by the action of impeller blades to the fluid flow at each of flow rates in the flow passage of impeller blades.