The real flow in an impeller is turbulent and  three-dimensional. Secondary flows, separation and reattachment in boundary layers, cavitation, transient recirculation areas and other features may occur. Nevertheless it is useful - and it is common practice in the pump design theory - to simplify the realistic flow applying representative streamlines for the first design approach.

Employing 1D-streamline theory the following cross sections are significant in particular:

•suction area/ inlet (index 1)

•leading edge (index LE)

•discharge side/ outlet (index 2)

Details

¢ Setup

¢ Parameters

¢ Dimensions