The flow fields in the blood pump show that a series of vortexes just like Karman vortex street occur downstream the impeller, making the flow unsteady.

• 计算了血泵内的流场分布，发现由于叶轮的高速旋转，叶轮后出现了类似于卡门涡街的旋涡，造成流动不稳定。