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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 with impeller rotor, a new type of shaftless double-suction blood pump was designed. In order to study the hydraulic performance and hemolytic performance of blood pump, the three-dimensional unsteady numerical simulation of blood pump under design conditions was taken into account, and the pulsatile flow conditions as human heart time were taken into account. Under the internal flow velocity, pressure and wall shear stress distribution and the stability of the pump operation. The numerical results show that the pulsating flow conditions, to achieve the pump flow and head of the fluctuating output, compared with non-beating flow, the pressure stability is poor. The results provide a useful reference for the application of blood pump in modern mechanical auxiliary system such as artificial heart and artificial dialysis.