中空式轴流血泵的数值模拟及初步优化

发布时间：2018-03-23 12:44

本文选题：中空式轴流血泵　切入点：数值模拟　出处：《清华大学》2012年硕士论文

【摘要】：心室辅助装置在心衰竭及心脏病的移植领域得到了广泛的应用，其中，传统的旋转式轴流血泵在最近10来年里得到了快速的发展，它有如下优点：体积小、耗能低、结构比较简单等优点。在人工血泵的设计中，，计算流体力学(CFD)所起的作用日益显著。特别是根据计算结果预测血泵的流体动力特性，并分析其内部的流场、压力等特性，同时可以预测其溶血和凝血指标。通过软件的数值模拟，可以大大的节省研发的费用以及时间。近年来，在世界上，尽管传统式轴流血泵受到了广泛的重视，但是，传统式轴流血泵在溶血和凝血问题上，一直未能得到很好的解决。正因为如此，作者进行了中空式轴流血泵的设计。中空式轴流血泵从根本上大大的解决了传统血泵的溶血和凝血问题，同时减轻了血泵重量、简化了血泵结构，易于植入。在本文中，作者设计了中空式轴流血泵，并构造了高质量的六面体网格，通过商业软件CFX进行了数值模拟计算，通过分析流场结构，讨论了不同血泵结构对血泵的影响。在本文中，作者针对中空式轴流血泵的问题进行了分析，并设计了几种形式的中空式血泵，同时对转子部分叶片进行了初步的优化。主要完成了如下工作： 1．通过Proe，Catia等软件完成中空式血泵的三维模型的构建，并通过ICEM生成高质量的六面体单元网格。 2．利用商用CFD软件ANSYS CFX对中空式血泵进行了数值模拟，分析了其流场结构，并以此揭示了血泵内一系列独特的流场特性及其与溶血、凝血的关系。 3．在小范围内对转子叶片进行了优化，并以此来指导血泵设计工作。
[Abstract]:Ventricular assistive devices have been widely used in the field of heart failure and heart disease transplantation. Among them, the traditional rotary axial bleeding pump has developed rapidly in the past 10 years. It has the following advantages: small size, low energy consumption, In the design of artificial blood pump, computational fluid dynamics (CFD) plays an increasingly important role. In particular, the hydrodynamic characteristics of blood pump are predicted based on the calculated results, and the internal flow field, pressure and other characteristics are analyzed. At the same time, the hemolysis and coagulation indexes can be predicted. Through the numerical simulation of software, the cost and time of research and development can be greatly saved. In recent years, in the world, despite the extensive attention paid to the traditional axial bleeding pump, the traditional axial bleeding pump has not been well solved in the problems of hemolysis and coagulation. The author designs the hollow axial bleeding pump. The hollow axial bleeding pump solves the hemolysis and coagulation problems of the traditional blood pump greatly, at the same time, it reduces the weight of the blood pump, simplifies the structure of the blood pump, and is easy to be implanted. The author designs a hollow axial bleeding pump and constructs a high quality hexahedron mesh. The numerical simulation is carried out by the commercial software CFX. By analyzing the flow field structure, the influence of different blood pump structures on the blood pump is discussed. In this paper, the author analyzes the problems of hollow axial blood pump, designs several kinds of hollow blood pump, and optimizes the rotor blade. The main work is as follows:. 1. The 3D model of hollow blood pump was constructed by Proeon Catia software, and the high quality hexahedron cell grid was generated by ICEM. 2. The numerical simulation of hollow blood pump is carried out by using commercial CFD software ANSYS CFX, and its flow field structure is analyzed. A series of unique flow field characteristics in the pump and their relationship with hemolysis and coagulation are revealed. 3. The rotor blade is optimized to guide the design of blood pump.
【学位授予单位】：清华大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：R318.6;O35

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