轴流式磁悬浮血泵流场数值模拟及溶血预测

血泵流体动力分析是研发先进人工心脏泵的前提,血泵叶轮旋转时会对血细胞造成不同程度的机械损伤,从而导致溶血和血栓,严重时甚至危及患者生命。以设计的一种轴流式磁悬浮血泵为例,结合计算流体力学和结构优化设计,采用κ-ε模型、动网格技术和用户自定义函数技术,在轴流式磁悬浮血泵内部三维流场数值模拟的基础上,分析轴流式磁悬浮血泵流道的剪应力分布,探索血液流量与叶轮转速的关系,利用粒子追踪法获取血液细胞流动轨迹,建立一种轴流式磁悬浮血泵的溶血数学模型,阐述轴流式磁悬浮血泵溶血性能预测的方法和机理。研究结果可为轴流式磁悬浮血泵的结构设计和降低溶血提供重要依据。
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Flow Field Numerical Simulation and Hemolytic Prediction for Axial Flow Maglev Blood Pump

Blood pump impeller causes varying degrees of mechanical damage of blood cells when rotating, which will lead to hemolysis and thrombosis, even threat patient life. For an axial flow maglev blood pump, based on CFD and structural optimization design, using κ-ε model, dynamic mesh and user defined function(UDF), a three-dimensional numerical simulation of axial flow maglev blood pump was carried on, hemolytic mathematical model was established, the flow shear stress distribution of axial flow maglev blood pump was obtained, the relationship between blood flow and impeller speed was explored, blood cell flow path was gotten based on particle tracking method and also do hemolysis prediction. This analysis provides an important basis for structure design and hemolysis reduce of axial flow maglev blood pump.