中文摘要：

血泵对血液的破坏程度是衡量血泵性能的一个重要指标,而植入式混流血泵内部流场中过大的压力梯度是导致血液中红细胞破碎从而引起溶血的重要因素之一。本文采用水力旋流场及血液流变学理论对混流血泵内血液压差损伤机理进行了研究,给出了红细胞压差破碎的判定依据,并结合所设计的植入式混流血泵,应用多相悬浮体CFD仿真技术,对血泵中的压力场进行了仿真分析。仿真结果表明：所设计的植入式混流血泵中的压力分布情况可以满足血液生理要求。

英文摘要：

For a blood pump, the injury to blood is a very important index for evaluating. The large pressure gradient, formed in the internal flow field of an implantable spiral mixed blood pump, is an important factor leading to blood hemolysis. The study on the injury principle of blood pressure difference in the spiral mixed blood pump is carfled out by using the theory of waterpower rotated flow field and hemorheology. The determinant gist on the fragmenta- tion of red blood cell caused by pressure difference is obtained. The divisions of press field in the designed implantable spiral mixed blood pump have been simulated and analyzed by using the multiphase suspend body CFD simulation technology. The simulation results indicate： The divisions of pressure in the designed implantable spiral mixed blood pump can meet the requirements of blood physiology.