基于CFD磁悬浮离心血泵多相流流场仿真研究  

Simulation of Multiphase Flow in a CFD-based Magnetic Levitation Centrifugal Blood Pump

作　　者：吴华春[1,2] 彭斯捷 Hua-chun Wu;Si-jie Peng(School of Mechanical and Electronic Engineering,Wuhan University of Technology;Hubei Provincial Engineering Technology Research Center for Magnetic Suspension)

机构地区：[1]武汉理工大学机电工程学院 [2]湖北省磁悬浮工程技术研究中心

出　　处：《风机技术》2023年第1期40-46,共7页Chinese Journal of Turbomachinery

基　　金：国家重点研发计划(2018YFB2000103)。

摘　　要：磁悬浮离心式血泵具有较好的血液流动性与血液相容性,由于其转速低、轴向尺寸小被应用于心室辅助装置。然而,血液本身是一个非常复杂的非牛顿流体,把血液看成单相流体不利于弄清红细胞在离心血泵内的分布规律,同时也没有考虑红细胞对流场的影响。为了弄清血泵流场的分布规律,且又不过多增加数值仿真的计算量,通过将血浆定义为液相、红细胞定义为固相,采用混合物模型(Mixture),基于计算流体力学进行模拟仿真,探讨磁悬浮离心式血泵多相流流场分布规律。研究结果表明,在工作转速(n=3600r/min),进口流量为6L/min的工况下,磁悬浮离心血泵可以满足人体生理需求,具有较好的机械效率,该研究为弄清血泵多相流流场提供了数值仿真支撑。Magnetic levitation centrifugal blood pump has good blood flow and blood compatibility,and is used in ventricular assist devices due to its low rotational speed and small axial size.However,blood itself is a very complex non-Newtonian fluid,and treating blood as a single-phase fluid is not conducive to clarifying the distribution law of red blood cells in the centrifugal blood pump,and also does not consider the influence of red blood cells on the flow field.In order to clarify the distribution law of the blood pump flow field without excessively increasing the amount of numerical simulation calculations,this paper defines the plasma as the liquid phase and red blood cells as the solid phase.The flow field distribution law of multiphase flow in magnetic levitation centrifugal blood pump was discussed.The research results show that under the working condition of the working speed(n=3600r/min)and the inlet flow rate of 6L/min,it can meet the physiological needs of the human body and has a good mechanical efficiency,which is helpful for clarifying the multiphase flow field of the blood pump.The research provides numerical simulation support.

关 键 词：离心式血泵 磁悬浮 多相流 CFD 流场分析 

分 类 号：TH311[机械工程—机械制造及自动化]