应用CFD对人工血泵流场进行数值仿真  

ANALYSIS OF FLOW FIELD IN AN ARTIFICIAL BLOOD PUMP WITH CFD

作　　者：张宝宁[1] 张扬军[1] 吴玉林[1] 孟庆国[2] 焦立新[3] 张锦[3] 王奇[4] 李佳春[4] 李功宋[4] 

机构地区：[1]清华大学,北京100084 [2]国家自然科学基金委员会,北京100083 [3]北京航空航天大学,北京100083 [4]解放军总医院,北京100853

出　　处：《中国生物医学工程学报》2002年第1期41-45,共5页Chinese Journal of Biomedical Engineering

摘　　要：发展人工心脏以便在某些情况下代替心脏进行供血已成为医学界的普遍要求。血泵研制和改进中所面临的主要难点之一是血液在血泵中的流动分离等复杂流动情况 ,对人工血泵中血液的流体动力分析是发展先进人工血泵的前提。本文应用计算机求解三维Navier Stokes方程 ,对某型血泵叶片通道间内部流场进行了数值仿真。研究分析结果表明 ,血泵中流体具有非常复杂的流动情况。为避免流动中分离造成流体升压比下降和血细胞破坏 ,对通道的进口和小叶片的安放位置以及叶片高度的变化都提出了很高的要求。One of the most difficulties in an artificial blood pump design is the complex flow field inside the pump impeller. The flow structure is very important to the pump performance and the blood characteristics. Prediction of the flow structure and separation will assist optimization of pump design to minimize hemolysis and platelet activation. A computational fluid dynamics (CFD) software to simulate the folw field inside the blood pump impeller was report. To redesign a centrifugal blood pump, the detail flow structure was investigated with the CFD software. The CFD simulation results showed that there were large scale separation flow and complex vortex structure inside the pump impeller passage, which might cause the pressure ratio drop and the blood trauma. Slipy inlet passage, apropriate blade location and relevant blade height were demanded in redesigning blood pumps to improve the flow performance and reduce the blood trauma.

关 键 词：人工血泵 流体力学 数值仿真 分离流动 流场结构 心血管疾病 

分 类 号：R318.01[医药卫生—生物医学工程] R318.11[医药卫生—基础医学]