SCIENCE & EDUCATION

Article file: SE-BMSTU...o174.pdf (1325.12Kb)

1 Bauman Moscow State Technical University, Moscow, Russia

The paper research object is a three-parted axial assist blood pump, which comprises a five-bladed straightener, a two-bladed impeller, and a three-bladed diffuser.
The main objective is to investigate how the geometrical parameters (incidence angle and pinch) of impeller influence on the blood pump coefficient of efficiency.
The problem was solved using methods of computational hemodynamics (CHD). A Carreau-Yasuda model was used to take into account the viscosity nonlinear properties of blood. Using structured grid and performing mesh independence test controlled a quality of results. 
Diagrams of coefficient of efficiency as function of geometrical parameters were plotted for various impeller angular velocities. Mathematical modeling revealed that above parameters have impacts on the value of the coefficient of efficiency with changing impeller angular velocities. Obtained results allow us to design an impeller, which provides the best capacity using the maximum of coefficient of efficiency as a criterion.  Resulting data are expected to find application in designing a prototype of the axial assist blood pump with a rotor on magnet bearings to ensure high efficiency with minimum blood trauma.

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