应用CFD研究叶轮设计对人工心脏泵内流场的影响

溶血是叶轮血泵常见的一种血液破坏现象，而造成这种现象的内在原因是血液的动力学行为。本研究针对基于流线型设计的叶轮血泵和一种直叶片血泵，应用CFD对其内部流场进行了数值模拟，并通过溶血实验对结果进行了验证。研究结果表明，流线型叶轮血泵内的流动模式符合流线型设计理论，与直叶片叶轮血泵相比，它的溶血较小，更符合血液动力学要求。可以认为，在相同的边界条件下，流线型叶轮血泵具有更好的血液相容性，不容易造成血液破坏。

An Investigation of Effect of Impeller Design on Flow Patterns in Blood Pumps with CFD

Hemolysis is a common phenomenon in the damage of blood resulted by blood pumps.The essential reason of the phenomenon is the hemodynamics in blood pumps. CFD was applied to predict the flow patterns in a streamlined blood pump and a pump with straight vanes respectively. Hemolysis tests were performed to verify the data of simulation. The results revealed that the flow patterns in the stream-lined impeller pump were coincident with the theory of stream-lined design. In the same boundary conditions, the blood pump based on stream-lined design was expected to have better hemocompatibility than the pump with straight vanes.