小型离心血液泵内流动特性的数值研究  

Numerical investigations on flow characteristics of micro-centrifugal blood pump

作　　者：李军[1] 孙皓[1] 李国君[1] 丰镇平[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《热科学与技术》2007年第3期235-240,共6页Journal of Thermal Science and Technology

摘　　要：采用数值求解Reynolds-Averaged Navier-Stokes方程技术,研究分析了小型离心血液泵内三维流动特性和水力性能。计算得到的不同流量条件下血液泵的水力性能与试验数据吻合良好,验证了计算方法的可靠性。分析了在设计流量、小流量和大流量条件下血液为工质的离心泵内流动形态。研究结果表明:在3种流量条件下,离心血液泵的出口流场均匀,满足设计要求。对血液泵内涡流产生及其容易产生溶血的位置进行了初步探讨,为改进血液泵结构设计提供参考。A numerical simulation of the three-dimensional flow characteristics and hydrodynamic performance of the micro-centrifugal blood pump by Reynolds-Averaged Navier-Stokes solutions was presented. The numerical hydrodynamic performance of the micro-centrifugal blood pump is well coherence with the experimental data for the water and blood fluids. The different flow characteristics of the micro-centrifugal blood pump at large, rated and small flow rate was investigated in details. The obtained results show that the uniform flow condition at the exit boundary was observed. The development of the vortex flow and consequently the probability of hemolysis formation in the micro-centrifugal blood pump are discussed.

关 键 词：离心血液泵 水力性能 溶血 数值模拟 

分 类 号：R31[医药卫生—基础医学]