后导轮导叶对轴流血泵流动特性影响的研究

The Influence of Guide Blade of Rear Guide Impeller on the Fluid Flow Characteristic of Axial Flow Blood Pump

利用Pro/E软件对血泵的不同结构进行三维建模,应用计算流体力学中非定常三维N-S方程、基于非结构网格的有限体积法以及k-ε湍流模型方法模拟血泵的全三维内流场,着重计算和分析后导轮叶片角度变化对血泵流场的影响。仿真试验表明:后导轮导叶对血泵出口流动有影响,后导轮可修正泵出口处由于转子旋转加速对流体形成的旋转作用,选择合适角度的后导轮导叶可以在泵出口处得到平稳无旋转的流场。

Pro/E Software was applied to establish the 3D models of the blood pump with different structure. Based on non-steady 3D N-S equations, finite volume method with non-structure grid and k-6 turbulent model, the 3D flow field of the blood pump was simulated, the influence of the variation of angle of the guide blade of rear guide impeller on the blood pump flow field was analyzed. Simulation experiments show that guide blade of the rear guide impeller has influence on the outlet flow field of the blood pump. Rear impeller can change the rotating action on the outlet flow field because of the rotor rotating. Selecting the guide blade of the rear guide impeller with proper angle, steady and non-rotation flow field on outlet blood pump can be obtained.