轴流血泵叶轮结构CFD仿真优化研究  

Research of CFD simulative optimization on impeller structure of axial blood pump

作　　者：云忠[1] 谭建平[1] 龚中良[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083

出　　处：《机械设计》2006年第10期6-9,共4页Journal of Machine Design

基　　金：国家自然科学基金(50275151);湖南省自然科学基金(02JJY2080)

摘　　要：轴流血泵内部流场形态产生的高剪切力是导致血液溶血的重要因素,因此,对轴流血泵中血液的流体动力分析有助于血泵性能的优化及减少血液细胞的损伤。应用计算机求解RNGk-ε方程,对所设计的微型轴流血泵叶轮中血液的流线及速度、压力、应力等分布情况进行了仿真分析。研究结果表明:血泵中的流体具有非常复杂的流动情况,为了避免流动分离、压力变化过大等情况,减少切应力,对血泵叶轮结构提出了相应的改进意见,并给出了优化后的叶轮结构。High shearing force produced by the shape of interior flow field of axial blood pump is the important factor leading to blood hemolysis. Hence, the fluid kinetic analysis of blood inside the axial blood pump is helpful to optimize the function of blood pump and to reduce the hurt of blood cells. Utilizing the computer this paper solved the RNG k-ε equation and carried out simulation analysis on distribution status of flowline, speed, pressure and stress etc. of blood in the being de signed impeller of micro-axial blood pump. The result of study shows that the liquid inside the blood pump has very complicated flowing conditions. For the sake of avoiding the status of flow separation and too big variation of pressure, it is necessary trying to find a way to lower the shearing stress of fluid. For this reason, a corresponding opinion of improvement was put forward on the impeller structure of blood pump and the impeller structure after optimization was presented.

关 键 词：轴流 血泵 叶轮 仿真 优化 

分 类 号：R318.01[医药卫生—生物医学工程]