Abstract

Info

Author(s):: LIU Chen1; 2; ZHANG Weibin1; 2; HENG Yaguang1; 2; JIANG Qifeng1; 2; SHEN Kun1; 2; CUI Qingqing1; 2; 1. School of Energy and Power Engineering, Xihua University, Chengdu 610039, China 2. Key Laboratory of Fluid and Power Machinery, Ministry of Education, Xihua University, Chengdu 610039, China

Keywords:: Keywords: artificial heart hemolysis computational fluid dynamics disc pump

Abstract:: Abstract: The hemolysis caused by the excessive shear force of the pump body on the blood cells and high velocity of flow has been a problem in artificial heart (blood pump). The disc pump impeller is selected to replace the traditional centrifugal pump impeller, and the two models are numerically calculated to analyze the internal shear force and velocity field of different impellers under normal human blood pressure. The results show that the traditional centrifugal pump has high internal velocity and larger shear force on blade surface, resulting in great damages to blood cells, while the disc pump has less shear force, uniform velocity distribution, and smaller velocity. Therefore, the disk pump instead of the traditional centrifugal pump can reduce the occurrence of hemolysis at different rotational speeds. When the number of blades is 6, the disc pump exhibits better performance on anti-hemolysis. The study provides a theoretical basis for the optimization of blood pump.