Axial Blood Pump Flow Field Analysis And CPB Experiment Research

Heart failure has become a major threat to human health.Every year thousands of people died of heart failure.Due to a lack of donated hearts,heart transplantation has been unable to meet the requirements of all the patients.Therefore,we can only rely on artificial heart pumps and other ventricular assist devices to improve the conditions of patients with heart diseases.There are several advantages of axial-flow blood pumps.For instance,they have a compact structure,a smaller size and low power consumption,on account of which more and more developers focus on them.However,the axial-flow blood pumps are coupling effected by Mechanical,Electrical and Fluid.The internal flow situation is more complex and requires a clear analysis of its internal flow pattern and is expected to be verified by CPB experiments,and it lays the foundation for the design,animal experiments and clinical application of axial-flow blood pumps.What this paper focuses on is an axial-flow blood pump that is developed independently by our research group,the finite element technology and CFD(Computational Fluid Dynamics)technology are compressively used in the studying of the internal flow;By building a CPB experimental platform for the axial-flow blood pump,checking the reliability of the CFD simulation analysis and examining if the axial-flow blood pump hydraulic characteristics can meet the physical requirements by CPB experiment.The main results obtained in this paper are as follows:(1)Utilizing Computer Aided Engineering software,such as Workbench and Fluent to acquire pressure of the internal flowof axial blood pumps,which provide a theoretical reference for the post-axial-flow blood pump design.(2)A CPB experiment platform has been design and built,whichenables developers to efficiently control each instrument through the PC system and the impacted parameter results of the axial flow blood pump hydraulic characteristics can be visuallyreflected on the front panel in the real-time,thus achieving a good human-computer interaction.(3)Performing on the CPB experimental platform to obtain each impacted relevant parameters experiment's data of the axial-flow blood pump hydraulic characteristics,using two data processing methods in the analysis of CFD simulation and experimental results,comparing the offset value and laws of variety,the paper can come to the conclusion that CFD simulation and experimental results have good fitting and the hydraulic characteristics of the axial-flow blood pump can not reach physiological requirements,so that it can lay a good foundation for lateranimal experiments and clinical applications.