离心式血液泵水力性能的实验及数值模拟  

Experimental investigation and numerical simulation of the hydraulic performance of a centrifugal blood pump

作　　者：王鑫[1] 朱雷[1] 罗先武[1] 刘树红[1] 曹广军[2] 

机构地区：[1]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 [2]中国人民解放军总后勤部油料研究所,北京102300

出　　处：《清华大学学报（自然科学版）》2011年第4期499-502,507,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50676044;50976061);北京市自然科学基金资助项目(3072008)

摘　　要：为研究血液泵中的流动与水力性能和生理相容性的内在联系,在闭式血液泵实验台上,通过调节电机转速和控制流量的方式对一种径向离心式血液泵进行了外特性实验研究。为了与实验对比,对该泵进行了全流道三维定常湍流数值模拟。根据实验结果及流动分析得知:血液泵在流量5 L.min-1时扬程大于1 m,通过调整电机转速可以得到宽广的运行范围;血液泵运行在较低转速时流动的Reynolds数效应不可忽略;叶片吸力面出口附近壁面剪切应力较大,是造成血液损伤的危险区域。External characteristic tests were made with a radial blood pump by adjusting the motor speed and controlling the flow on a close-loop experimental rig to analyze the relationship between the flow in the blood pump and the hydro performance and biocompatibility.Three-dimensional steady turbulent flow was then simulated to compare with the test results.The results indicate that the head of the blood pump is more than 1 m with a flow discharge of 5 L·min^-1,with the blood pump operating in a wide range.The results show that the Reynolds number effect cannot be neglected at low rotational speeds.Flow characteristic analysis shows that the wall shear stress in the region near the trailing edge of the suction side on the vane surface is relatively large,thus forming dangerous regions for blood cells.

关 键 词：离心式血液泵 水力性能 三维湍流 Reynolds数效应 壁面剪切应力 

分 类 号：TH311[机械工程—机械制造及自动化]