流道型轴流血泵流体仿真与水力实验分析  

Fluid simulation and hydraulic experimental analysis of flow-channel type axial-flow blood pump

作　　者：熊驰 汤晓燕[1] 云忠[1] 冯龙飞 XIONG Chi;TANG Xiaoyan;YUN Zhong;FENG Longfei(School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《中国医学物理学杂志》2021年第10期1308-1315,共8页Chinese Journal of Medical Physics

基　　金：国家自然科学基金(31670999);湖南省自然科学基金(2019JJ40364)。

摘　　要：为了研究血泵的水力性能,以课题组自制的流道型轴流血泵作为对象,通过计算流体动力学方法,建立血泵流体动力学分析模型,研究血泵叶轮的各个结构参数对血泵水力性能的影响,分别进行不同叶片数、轮毂比、叶型安装角、流道宽度、进出口轴径比参数下的血泵水力性能仿真计算与分析。此外,通过对比分析水力性能和流线图,研究前后导叶对血泵水力性能的影响。采用钛合金材料制作血泵实体,通过模拟人体血液循环回路形式搭建血泵水力试验台,流体介质采用纯净水和甘油混合配制而成的实验液体。在不同转速条件下,对血泵实际水力性能进行测试。水力实验结果表明,该流道型轴流血泵具有较好的水力性能,与计算流体动力学水力性能仿真结果能够较好地吻合,证明血泵性能可以初步满足人体生理需求。Aiming at the hydraulic performance of the blood pump,the flow-channel type axial-flow blood pump made by the research group is taken as the object,and a fluid dynamics analysis model for the blood pump is established through computational fluid dynamics,so as to investigate the effect of each structural parameter of the blood pump impeller on the hydraulic performance of the blood pump,and to conduct simulation calculation and analysis on the hydraulic performance of the blood pump under different parameters including the number of vanes,hub ratio,vane profile installation angle,flowchannel width,inlet and outlet axial diameter ratio.In addition,the effects of the front and rear guide vanes on the hydraulic performance of the blood pump were studied by comparing hydraulic performance with streamline diagram.The titanium alloy was used to make the blood pump entity,and the blood pump hydraulic test bench was built by simulating the human blood circulation loop,and the fluid medium was a mixture of pure water and glycerin.The actual hydraulic performance of the blood pump was tested at different rotational speeds.The results of hydraulic experiment indicate that the flow-channel type axial-flow blood pump has preferable hydraulic performance which was well matched with hydraulic performance simulation results obtained by computational fluid dynamics,proving that the blood pump performance can initially meet the human physiological needs.

关 键 词：人工心脏 轴流血泵 叶轮 水力性能 流体动力学 

分 类 号：R318[医药卫生—生物医学工程] TH312[医药卫生—基础医学]