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撤机对离心血泵血液相容性影响的数值研究

谢楠 唐雨萌 张岩 柳阳威

谢楠,唐雨萌,张岩,等. 撤机对离心血泵血液相容性影响的数值研究[J]. 北京航空航天大学学报,2023,49(7):1680-1688 doi: 10.13700/j.bh.1001-5965.2021.0494
引用本文: 谢楠,唐雨萌,张岩,等. 撤机对离心血泵血液相容性影响的数值研究[J]. 北京航空航天大学学报,2023,49(7):1680-1688 doi: 10.13700/j.bh.1001-5965.2021.0494
XIE N,TANG Y M,ZHANG Y,et al. Numerical study of blood pump weaning effects on hemocompatibility of centrifugal blood pump[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(7):1680-1688 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0494
Citation: XIE N,TANG Y M,ZHANG Y,et al. Numerical study of blood pump weaning effects on hemocompatibility of centrifugal blood pump[J]. Journal of Beijing University of Aeronautics and Astronautics,2023,49(7):1680-1688 (in Chinese) doi: 10.13700/j.bh.1001-5965.2021.0494

撤机对离心血泵血液相容性影响的数值研究

doi: 10.13700/j.bh.1001-5965.2021.0494
基金项目: 国家自然科学基金(51976006,52106039);航空科学基金(2018ZB51013)
详细信息
    通讯作者:

    E-mail:liuyangwei@126.com

  • 中图分类号: V239;R318

Numerical study of blood pump weaning effects on hemocompatibility of centrifugal blood pump

Funds: National Natural Science Foundation of China (51976006,52106039); Aeronautical Science Foundation of China (2018ZB51013)
More Information
  • 摘要:

    采用非定常数值模拟方法系统评估某离心血泵原型与改型在4个撤机阶段的血流动力学特性和血液相容性。对速度、湍动能、叶表压力的分布规律及不同撤机阶段的血液损伤进行研究,并对各监测点的压力脉动进行分析。研究结果表明:在降低心脏泵流量和供压的第1阶段(撤机阶段Ⅰ),原型和改型均有较好的血液相容性,满足抗溶血和抗血栓的性能要求,间隙泄漏涡是造成溶血主要的流动特征;随着撤机的进行,间隙泄漏涡强度明显减弱,溶血值呈显著的下降趋势,其脉动幅度也大大降低,改型的溶血值比原型减少30%以上;各监测点压力频谱呈现典型的离散特征,相较于原型,改型的转静干涉作用更加强烈,对血泵的电磁控制技术提出更高的要求。

     

  • 图 1  血泵原型与改型的俯视图及正视图

    Figure 1.  Top and front views of datum and modified blood pumps

    图 2  原型叶轮表面网格

    Figure 2.  Surface grid of datum impeller

    图 3  半叶高截面速度云图

    Figure 3.  Velocity counters at mid span plane of impeller

    图 4  原型血泵半径r=14 mm湍动能云图

    Figure 4.  Turbulent kinetic energy counters at r=14 mm plane of datum pump

    图 5  改型血泵半径r=14 mm湍动能云图

    Figure 5.  Turbulent kinetic energy counters at r=14 mm plane of modified pump

    图 6  原型血泵叶表相对压力分布

    Figure 6.  Distribution of relative pressure on blade surface of datum pump

    图 7  改型血泵叶表相对压力分布

    Figure 7.  Distribution of relative pressure on blade surface of modified pump

    图 8  不同撤机阶段的瞬时溶血值

    Figure 8.  Transient NIH of different weaning stages

    图 9  不同撤机阶段的溶血平均值

    Figure 9.  Mean value of NIH in different blood pump weaning stages

    图 10  监测点分布

    Figure 10.  Distribution of monitoring points

    图 11  原型泵内监测点压力脉动频域结果

    Figure 11.  Results of pressure fluctuation in frequency domain at monitoring points within the datum pump

    图 12  改型泵内监测点压力脉动频域结果

    Figure 12.  Results of pressure fluctuation in frequency domain at monitoring points within the modified pump

    表  1  血泵撤机阶段运行工况

    Table  1.   Operating conditions in blood pump weaning stage

    撤机阶段流量
    /
    (L·min−1)
    供压
    /
    Pa
    原型转速/
    (r·min−1)
    改型转速/
    (r·min−1)
    I3.02670732002622
    II2.51962027502255
    III2.01489224001971
    IV1.0 572815001237
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出版历程
  • 收稿日期:  2021-08-27
  • 录用日期:  2022-01-02
  • 网络出版日期:  2022-01-29
  • 整期出版日期:  2023-07-31

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