Methodology for the Development of a Closed 2-Channel Impeller with Low Susceptibility to Clogging

Wastewater pumps are increasingly clogged by solids containing fibers. Closed 2-channel impellers in particular are often highly susceptible to clogging due to their geometric properties, even though they have among the highest clear water efficiencies compared to other wastewater impellers. With the help of a clogging test rig, a prototype that can accommodate different closed 2-channel geometries, the use of 3D-simulation as well as an optical access for high-speed recordings, a methodology is to be created, whereby this impeller type can be effectively optimized. In this paper, the first impeller modification is calculated, manufactured, simulated and tested with this methodology.