In this study we have developed a valve-less micro-pump with one diffuser shaped element and a chamber with a diaphragm, the vibration of which produces an oscillating flow. The pressure-loss in a nozzle is lower than that in a diffuser, therefore one-way flow is realized in the nozzle direction. The frequency characteristics and the pump characteristics are measured. The measured maximum total pump head and volumetric flow rate are 0.8 kPa and 2.4 ml/min, respectively. The effect of working-fluid viscosity on pump characteristics is also discussed using water and glycerin-water solutions. As the result, the pump performances were found to be decreased with increasing fluid viscosity and the pump performances depended on the Reynolds number of oscillating flow.
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机译：在这项研究中，我们开发了一种无阀微型泵，该微型泵具有一个扩散器形的元件和一个带有隔膜的腔室，其振动会产生振荡流。喷嘴中的压力损失低于扩散器中的压力损失，因此在喷嘴方向上实现了单向流动。测量频率特性和泵特性。测得的最大总泵压头和体积流量分别为0.8 kPa和2.4 ml / min。还使用水和甘油水溶液讨论了工作流体粘度对泵性能的影响。结果，发现泵性能随着流体粘度的增加而降低，并且泵性能取决于振荡流的雷诺数。
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