Pulsatile Flow of the Fluid with the Flexible Particles through the Elastic Tube

本文对乳化液稳态流和脉动流引起的柔性管振动进行了实验研究。乳剂含有柔性颗粒（液滴），由于与血液具有相似的性质，这种液体被用作血液的替代品。分别用高灵敏度的间隙传感器和电磁流量计测量了柔性管的振动和通过柔性管的流量。研究结果如下：1.稳定流动（1）在高流速区，乳化液有降低软管振幅的作用。(2)在功率谱中发现两个尖锐的峰。这两个峰的位置几乎不受通过软管的流体的流速或性质的影响.脉动流（1）由于流速的脉动，乳剂具有增加柔性管脉动幅度的作用。(2)在流量的最大点和最小点附近，柔性管的波动突然发生。

The vibrations of flexible tube induced by the steady and pulsatile flow of emulsion are studied experimentally. The emulsion contains the flexible particles (liquid drops) and this fluid is used as a substitute of blood because of a similar property to blood. The vibration of flexible tube and flow rate through the flexible tube are measured by using a high sensitive gapsensor and an electromagnetic flowmeter respecitively. The results are summarized as follows.1. Steady flow(1) The emulsion has an effect to decrease the amplitude of flexible tube in a high flow rate region. (2) Tow sharp peaks are found in the power spectrum. The position of these two peaks are hardly affected by the flow rate or the property of fluid through the flexible tube.2. Pulsatile flow(1) The emulsion has an effect to increase the pulsatile amplitude of the flexible tube due to the pulsation of flow rate. (2) In vicinity of the maximum and minimum points of the flow rate, the fluctuations of the flexible tube occurs suddenly.