无轴双吸式血液泵内部流动分析  

Internal Flow Analysis of a Shaft-Less Double-Suction Blood Pump

作　　者：庄保堂[1] 罗先武[2] 纪晶晶[2] 许洪元[2] 

机构地区：[1]北京控制工程研究所,北京100190 [2]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《工程热物理学报》2015年第12期2608-2613,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51306018)

摘　　要：基于带有叶轮转子的双吸叶轮的概念,设计了一种新型无轴双吸式血液泵。为了研究血液泵的水力性能和溶血性能,对设计工况下血液泵进行了三维非定常数值模拟,同时考虑作为人类心脏用时的搏动流工况,以此为边界条件计算分析了搏动流工况下的内部流场的速度、压力和壁面剪切应力分布以及对泵运行稳定性的影响。数值计算结果表明,搏动流工况下,实现泵流量与扬程的波动输出,与非搏动流相比,其压力稳定性较差。该结果为血液泵在人工心脏、人工透析等现代机械辅助系统的应用提供有益的参考。Based on the concept of double-suction impeller combined with motor rotor,a novel shaft-less blood pump has been designed.In order to investigate the hydraulic performance and the biocompatibility of the pump,the unsteady numerical simulation for three dimensional flows in entire pump passage near the design condition is conducted.In the calculations,the pulsatile flow of a natural artery is used as the boundary condition at pump inlet so as to observe the flow characteristics such as the velocity,pressure and wall shear stress in flow passage,and the effect on the operating stability of the pump.Based on the results of numerical simulation,the internal flow will be further discussed.

关 键 词：血液泵 双吸 非定常 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]