Optimum Analysis of Pump Head of New Type Pulse Blood Pump Driven by Electromagnetism Based on CFD
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1.School of Medical Instrument and Food Engineering,University of Shanghai for Sci-Tech,shanghai;2.Department of Critical Care Medicine,Shanghai East City Hospital,shanghai

Clc Number:

R318.01

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    Abstract:

    Objective To calculate the flow field of electromagnetically driven pulsating perfusion blood pump by computational fluid dynamics (CFD), improve the flow state of blood in blood pump by improving the structure of pump head, and improve its anti-hemolytic performance. Methods Fluent 17.0 was used to analyze the influence of the change of pump head structure on the flow field in the pump. Four simulation experiments were carried out to analyze the streamline distribution of the internal liquid, the turbulent flow energy distribution on the axis of the model, the pressure loss of blood flowing through the pump head and the shear stress on the surface of the model. Results In the four experiments, when the angle between the inlet and outlet of the pump head is symmetrical and the angle between the pump head and the symmetrical axis is 30 degrees, there is no obvious disturbance in the flow line and the turbulence degree is low. In the first experiment, the pressure loss is 376.8 Pa, with the minimum value. The maximum shear stress in the first and second experiments is 258.6 Pa and 302.8 Pa, which meet the requirements of biomechanical properties. The pump head structure of the pulsating blood pump driven by electromagnetic force was selected as the model with angle of 30 and was fabricated by 3D printing technology. Conclusion After optimization of the pump head, the hemolysis performance of the blood pump is improved. This result can be applied to the design and experiment of a new electromagnetic drive pulse perfusion blood pump.

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History
  • Received:February 27,2019
  • Revised:April 21,2019
  • Adopted:April 30,2019
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