Flow Field Analysis of a Centrifugal Rotary Blood Pump under Active Speed Modulations

被引：1
|
作者：
Huang F. [1 ,2 ,3 ]
Wang C. [2 ]
Ruan X. [3 ]
机构：
[1] School of Mechanical & Energy Engineering, Zhejiang University of Science and Technology, Hangzhou
[2] College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou
[3] State Key Laboratory of Fluid Power & Mechatronic Systems, Zhejiang University, Hangzhou
来源：
| 1600年 / Chinese Mechanical Engineering Society卷 / 32期
关键词：
Cardiovascular system; Computational fluid dynamics(CFD); Pulsation index; Rotary blood pump; Speed modulation;
D O I：
10.3969/j.issn.1004-132X.2021.24.003
中图分类号：
学科分类号：
摘要：
In order to study the effects of active speed modulation on the internal flow field and blood damages in the blood pumps, the CFD method was adopted to simulate the full flowpath internal flow of a blood pump under speed modulations. The combined numerical simulation of the lumped cardiovascular system mathematical model and the rotary blood pump model was used to obtain the ventricular and aortic pressures under the assisting of the blood pump, which were then set as the inlet and outlet boundary conditions of the blood pump in CFD simulations. The flow fields of blood pump under the constant speed and three types of asynchronous speed modulation waveforms, including sine, square and triangle waves, were analyzed, and the velocity distribution and shear stress distribution of the rotary blood pumps were obtained. The results show that the flow pulsation of blood pump is enhanced under speed modulations, which is a feasible scheme to restore the pulsation of the blood flow. Among the three speed modulation waveforms, the blood pump flow pulsation index is high and the shear stress in the blood pump is small under the sinusoidal speed modulation, which is a relatively ideal speed modulation waveform. © 2021, China Mechanical Engineering Magazine Office. All right reserved.
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页码：2915 / 2923
页数：8
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