| 叶顶间隙对人工心脏泵血液相容性影响的数值研究 |
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| 引用本文： | 谢楠,唐雨萌,柳阳威,张岩. 叶顶间隙对人工心脏泵血液相容性影响的数值研究[J]. 航空动力学报, 2021, 36(6): 1304-1314. DOI: 10.13224/j.cnki.jasp.2021.06.019 |
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| 作者姓名： | 谢楠 唐雨萌 柳阳威 张岩 |
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| 作者单位： | 北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京100191;北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京100191;先进航空发动机协同创新中心,北京100191;中国医学科学院阜外医院成人外科中心,北京100037 |
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| 基金项目： | 国家自然科学基金（ 51976006, 51790513）； 航空科学基金（2018ZB51013）； 中国博士后科学基金（2020M670097） |
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| 摘 要： | 采用定常和非定常数值方法系统研究了离心血泵在供压173mmHg时,4组不同叶顶间隙下的血流动力学特性和血液相容性.所研究的间隙分别为5.0、2.0、1.0mm和0.2mm,对速度、湍动能等参数的分布规律以及标准溶血指数(normalized index of hemolysis,NIH)随叶顶间隙大小的变化规律进行了研...
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| 关 键 词： | 离心血泵 溶血 血栓 叶顶间隙 间隙泄漏涡 |
| 收稿时间： | 2020-08-31 |
Numerical research on effects of blade tip clearances onthe hemocompatibility of artificial heart pump |
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| XIE Nan,TANG Yumeng,LIU Yangwei,ZHANG Yan. Numerical research on effects of blade tip clearances onthe hemocompatibility of artificial heart pump[J]. Journal of Aerospace Power, 2021, 36(6): 1304-1314. DOI: 10.13224/j.cnki.jasp.2021.06.019 |
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| Authors: | XIE Nan TANG Yumeng LIU Yangwei ZHANG Yan |
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| Affiliation: | 1.National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics,School of Energy and Power Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China2.Collaborative Innovation Center for Advanced Aero-Engine,Beijing 100191,China3.Department of Cardiac Surgery,Fu Wai Hospital,Chinese Academy of Medical Sciences,Beijing 100037,China |
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| Abstract: | Steady and unsteady numerical simulations were carried out to systematically research the hemodynamic performance and hemocompatibility of four groups of centrifugal blood pumps with different blade tip clearance at 173 mmHg. The gaps studied were 5.0 mm, 2.0 mm, 1.0 mm and 0.2 mm, respectively, the distribution of parameters and the changes of normalized index of hemolysis with the size of blade tip clearance were researched. The results showed that the origin pump had good hemocompatibility at 3.0 L/min against a pressure head of 173 mmHg; with the decrease of blade tip clearance, the max stress and the normalized index of hemolysis showed a single peak and the minimum normalized index of hemolysis 0.000 5 g/100 L was obtained in the 1.0 mm clearance structure, which reduced the risk of thrombosis in the gap between the outer impeller walls and the lower housing cavity walls; compared with the results of the unsteady simulation: steady results were often too small to predict hemolysis, the transient normalized index of hemolysis changed periodically with the impeller rotation, and the difference between its mean and the steady results was within 5%. |
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| Keywords: | centrifugal pump hemolysis thrombosis blade tip clearance tip leakage vortex |
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