The splitter blade can effectively optimize pump performance, but there is still insufficient research in blood pumps that cover both hydraulic and hemolysis performance. Thus, the aim of this study was to investigate the effect of key factors related to splitter blade on the performance and flow field of axial flow blood pump. In this study, the number of splitter blades, the axial length, and the circumferential offset were chosen as three objects of study. An analysis of the flow field and performance of the pump by orthogonal array design using computational fluid mechanics was carried out. A set of hydraulic and particle image velocimetry experiments of the model pumps were performed. The result showed that the pump had greater hydraulic performance without sacrificing its hemolytic performance when it had two splitter blades, the axial length ratio was 0.6, and the circumferential offset was 15°. Based on these reference data, the splitter blade may contribute to greater hydraulic performance of the pump and cause no side effect on the velocity distribution of the flow field. This finding provides an effective method for the research, development, and application of structural improvement of the axial flow blood pump.

分离器叶片可以有效地优化泵的性能，但是对于同时兼具液压和溶血性能的血泵，仍然缺乏足够的研究。因此，本研究的目的是研究与分流叶片相关的关键因素对轴流血泵性能和流场的影响。在这项研究中，选择分割叶片的数量，轴向长度和周向偏移作为三个研究对象。使用计算流体力学通过正交阵列设计对泵的流场和性能进行了分析。进行了一组模型泵的水力和颗粒图像测速实验。结果表明，当泵具有两个分流叶片时，泵具有更高的水力性能而不会牺牲其溶血性能，轴向长度比为0.6，周向偏移为15°。基于这些参考数据，分流叶片可有助于提高泵的液压性能，并且不会对流场的速度分布产生任何副作用。该发现为轴流式血泵的结构改进的研究，开发和应用提供了有效的方法。