计算流体动力学在叶轮式心脏泵中的应用研究

造成溶血、血栓等血液破坏现象的内在原因之一是血液的动力学行为。研究表明，不规则的流动模式尤其是切变流中产生的机械切应力直接导致血液的破坏。计算机技术的迅速发展使得微观动力学的数值模拟成为可能。本文针对基于流线型设计的叶轮心脏泵和直叶片叶轮心脏泵，应用计算流体动力学对其内部的流动行为进行了数值模拟。分析两种心脏泵的内流场和切应力分布，认为在相同的边界条件下，流线型设计的叶轮心脏泵要比直叶片心脏泵更符合血液动力学的要求，对血液的破坏较小。

Investigation of Computational Fluid Dynamics Application in Blood Pumps

One of the internal reasons resulting in hemolysis and thrombi is the hemodynamics. Many studies show that irregular flow patterns and shear stress result in the damage of blood cells. With the rapid development of computer technology, simulation for such microdynamics becomes possible. Computational fluid dynamics was applied to predict the flow in the streamlined blood pump and a pump with straight vanes. After the analysis of flow patterns and the distribution of shear stress, it was concluded that in the same boundary conditions, the blood pump based on streamlined design had better hemodynamics than the pump with straight vanes and caused less harm to blood cells.