Geometry of Pediatric Implantable Axial Pump Impeller (DON-3) Optimization

Abstract

In developed model of pediatric axial pump (DON-3) we search the best geometry pump straightener and impeller. Optimization included methods of computational hydrodynamics (CFD). Changing of geometric parameters lead to changing in output pump parameters. The choice of best geometry was to obtain the position with maximum effective flow-dynamic pressure characteristics under pump operating mode. The calculations were performed for the optimal pump mode 15,000 rpm. Evaluating results of the simulation for each parameter, which is satisfies the condition of maximum differential efficiency, got a new flow pressure characteristics of axial pump with new geometry. Simulations took into account output parameters such as shear stress and vorticity. The aim of this work is to increase the hydraulic efficiency of DON-3 and to reduce the risk of hemolysis and thrombosis.