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Journal of Vibration Testing and System Dynamics 9(3) (2025) 291--308 | DOI:10.5890/JVTSD.2025.09.007

Zhenrong Guo\textsuperscript{1}, Yang Lv\textsuperscript{1}, Fangxin Li\textsuperscript{1}, Jianliang Liu\textsuperscript{1}, Yanying Dong\textsuperscript{2}, Yeyin Xu\textsuperscript{1}

noindenttextsuperscript{1} hangindent=1em School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China. noindenttextsuperscript{2} hangindent=1em Clinical Laboratory, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710049,PR China.

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Abstract

Artificial cardiac assist devices are effective devices for the treatment of heart failure. In this paper, two semi-open impeller centrifugal blood pumps with the characteristics of full hydrodynamic suspension are optimized based on fluid dynamics. The dynamic pressure coupling effects between the impeller and the blood are crucial for the safe installation and circulation of the blood pump. Numerical simulations of the blood pump are conducted using computational fluid dynamics (CFD) methods, which include unstructured mesh, ${k} $--$\varepsilon$ model, and coupled algorithms, to investigate the influence of various parameters such as the number of blades, outlet angle, wrap angle, blade curvature, and structural elements like guide column and splitter blades on the performance of the blood pump. The results show that both types of impellers perform optimally with 10 blades, equipped with guide vanes and splitter blades. For the favorable parameter design model, it is recommended to select an outlet angle of 60${^\circ}$ and a wrap angle of 120${{}^\circ}$, while for the Bezier curve design model, it is suggested to choose an outlet angle of 30${{}^\circ}$ and a blade curvature angle of 90${{}^\circ}$

Acknowledgments

This work is supported by the National Nature Science Foundation of China (Grant No. 12102319) and the Key R\&D and Transformation Plan Project of Qinghai Province(NO. 2023-QY-215).

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