Qian K X, Wang F Q, Zeng P, Ru W M, Yuan H Y, Feng Z G
Institute of Biomedical Engineering, Jiangsu University, Zhenjiang, 212013, PR, China.
J Med Eng Technol. 2006 Nov-Dec;30(6):353-7. doi: 10.1080/03091900500130807.
Computational fluid dynamics (CFD) technology was applied to predict the flow patterns in the authors' streamlined blood pump and an American bio-pump with straight vanes and shroud, respectively. Meanwhile, haemolysis comparative tests of the two pumps were performed to verify the theoretical analysis. The results revealed that the flow patterns in the streamlined impeller are coincident with its logarithmic vanes and parabolic shroud, and there is neither separate flow nor impact in the authors' pump. In the bio-pump, the main flow has the form of logarithmic spiral in vertical section and parabola in cross section, thus there are both stagnation and swirl between the main flow and the straight vanes and shroud. Haemolysis comparative tests demonstrated that the authors' pump has an index of haemolysis of 0.030, less than that of the bio-pump (0.065).
计算流体动力学（CFD）技术分别用于预测作者设计的流线型血泵以及一款带有直叶片和护罩的美国生物泵内的流动模式。同时，对这两款泵进行了溶血对比试验，以验证理论分析结果。结果显示，流线型叶轮内的流动模式与其对数叶片和抛物线形护罩相契合，且作者设计的泵内不存在分离流和冲击现象。在生物泵中，主流在垂直截面呈对数螺旋形式，在横截面呈抛物线形式，因此主流与直叶片和护罩之间存在停滞和涡流现象。溶血对比试验表明，作者设计的泵的溶血指数为0.030，低于生物泵的溶血指数（0.065）。
