Sakuma I, Tadokoro H, Fukui Y, Dohi T
Department of Applied Electronic Engineering, Faculty of Science and Engineering, Tokyo Denki University, Japan.
Artif Organs. 1995 Jul;19(7):665-70. doi: 10.1111/j.1525-1594.1995.tb02399.x.
Flow visualization is widely applied to evaluate rotary blood pumps; however, it is very difficult to visualize flow near the vanes of centrifugal blood pumps because the rotational speed of the impeller is usually several thousand rpm. In this study, a tracer method with a high speed video camera that can take more than 2,000 frames/s was utilized for flow visualization together with computer-assisted image measurement. This method visualized the complex secondary flow pattern near the vanes of the impeller, such as the vortex and recirculation. It also visualized the enhanced washout effect by the secondary washout vanes on the backside of the impeller. The proposed method was effective to analyze the flow pattern in the centrifugal blood pump by providing useful information for better design of the pump hemolysis and thrombus formation.
流动可视化技术被广泛应用于评估旋转式血泵；然而，由于离心泵叶轮的转速通常为数千转每分钟，因此很难对离心泵叶片附近的流动进行可视化。在本研究中，利用配备了能够以每秒2000帧以上的速度拍摄的高速摄像机的示踪法，并结合计算机辅助图像测量技术来进行流动可视化。该方法使叶轮叶片附近复杂的二次流动模式得以可视化，例如涡流和回流。它还使叶轮背面的二次冲洗叶片产生的增强冲洗效果得以可视化。所提出的方法通过为更好地设计泵的溶血和血栓形成提供有用信息，有效地分析了离心泵内的流动模式。
