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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。
In order to study the intrinsic relationship between flow and hydraulic properties and physiological compatibility in blood pumps, a radial centrifugal blood pump was externally characterized by adjusting motor speed and controlling flow rate on a closed blood pump bench Experimental Study. In order to compare with the experimental results, the numerical simulation of three-dimensional steady turbulent flow of the pump was carried out. According to the experimental results and flow analysis, it is found that the blood pump has a lift of more than 1 m at a flow rate of 5 L.min-1 and a wide operating range can be obtained by adjusting the motor speed. The Reynolds number effect of the blood pump running at a lower speed can not be obtained Ignore; blade suction surface near the wall shear stress is larger, is a dangerous area of blood damage.