基于血液剪切损伤机理的高速螺旋血泵仿真分析

 高速螺旋血泵内部流场形态产生的高剪切力是导致血液溶血的重要因素，因此，对高速螺旋血泵中血液的流体动力分析有助于血泵性能的优化及减少血液细胞的损伤。采用水力旋流场理论对高速螺旋流场内血液剪切损伤机理进行了研究，得出了红细胞剪切破碎的判定依据，并结合所设计的植入式螺旋血泵，应用多相悬浮体CFD仿真技术，对血泵中的剪切应力场进行了仿真分析。研究结果表明：所设计的高速螺旋血泵中，剪切应力的分布能够满足血液生理要求。

Simulation Analysis of the High-speed Spiral Blood Pump Based on the Shear Injure Principle of Blood

The high shear stress, formed in the internal flow field of high speed spiral blood pump, is an important factor leading to blood hemolysis. Hence, predication of the flow structure will assist optimization of pump design to minimize the hurt of blood cells. The study on the shear injure principle of blood in the high speed spiral blood pump is carried with using the theory of waterpower rotated flow field. The determinant gist on the red blood cell shear fragmentation is obtained. The divisions of shear stress field in the designed embedded spiral blood pump have been simulated and analyzed by using the multiphase suspend body CFD simulation technology. The research results indicate:that the divisions of shear stress in the designed high speed spiral blood pump can meet the requirements of blood physiology.