Abstract

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Title:: Analysis of factors affecting axial flow blood pump temperature rise based on thermal-flow coupling

Author(s):: CHEN Honghuan; YUN Zhong; HU Jiyu; School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China

Keywords:: Keywords: axial flow blood pump temperature field simulation factors affecting temperature rise blood damage thermal-fluid coupling

Abstract:: Abstract: Artificial heart has entered the stage of clinical development, and hemolysis is a major problem restricting the long-term application of artificial heart. Abnormal temperature conditions will change the normal physiological function and morphology of red blood cells, thus affecting blood oxygen-carrying capacity. To study the temperature rise of artificial heart during normal operation, a three-dimensional simulation model of axial flow blood pump is established by Solidworks software. Then the simulation of thermal-flow coupling temperature field of the blood pump is carried out based on ANSYS Workbench software to explore the effects of different levels of stator winding phase resistance, rotate speed, air gap thermal conductivity between the stator shell and pump casing, and the thermal conductivity of blood on the global temperature rise of the blood pump and blood. The results indicate that under the premise of supplying adequate blood, the appropriate reductions of stator winding phase resistance and rotate speed can effectively reduce the global temperature rise of the blood pump, while the changes of the thermal conductivities of air gap materials and blood only have trivial effects on the global?emperature of the blood pump.