Optimization analysis for blades of artificial heart pump based on CFD

In this paper, computational fluid dynamics is used to simulate and analyse the flow field of a centrifugal artificial heart pump. First, the structural parameters of the centrifugal blood pump are initially determined, and the three-dimensional model of the flow field is established. The blood supply head of the pump is calculated based on the simulation results. The head of the centrifugal blood pump is 124.31mmHg under the design conditions (rotating speed is 2400rpm, flow rate is 6L/min), which meets the blood supply requirement of the heart pump. Then, by changing the blade profile length and blade shape, the performance of the centrifugal blood pump can be improved. The standard hemolysis index of the improved centrifugal blood pump dropped from 0.0508 to 0.0417, and its head is 119.65mmHg. It indicates that while reducing the destruction of blood cells by the heart pump, the requirement of blood supply head can still be met. The simulation results of this study can provide references for the design of centrifugal blood pump blades.