Certain Effects of Blade-Geometry and of Inlet-Recirculation on the Distribution of the Meridian Velocities at the Impeller-Outlet

This study discusses certain causes of the differences in the distribution of the meridian velocity-components of the pumped liquid, at the outlet of a rotodynamic impeller. In particular, it explains the seemingly enigmatic fact that, at design-flow, there have been observed very large differences in the shroud-to-shroud distribution of the meridian velocity-components of the liquid at the outlet of the impeller. Against this, below a certain partial flow-rate, the shroud-to-shroud distribution of these velocity-components became much more uniform.