The real flow in a pump 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 (index S), just before leading edge (index 0), at the beginning (index 1) and at the end of the blade (index 2) and finally behind the trailing edge (index 3).

Details

¢ Setup

¢ Parameters

¢ Dimensions