Simulation of unsteady characteristics and rectification efficiency of valveless micropump

被引：0
作者：
机构：
[1] Department of Mechanical Engineering, Zhejiang University
来源：
Ying, J. (yingji_zju@yahoo.cn) | 1600年 / Zhejiang University卷 / 47期
关键词：
Pressure loss; Total pressure loss; Valveless micropump;
D O I：
10.3785/j.issn.1008-973X.2013.06.015
中图分类号：
学科分类号：
摘要：
According to the principle of energy dissipation and pressure loss, this work studied the relationships between the change of flow with total pressure loss and pressure loss of diffuser/nozzle valveless micropump in the case of unsteady condition. In order to obtain the unsteady response characteristics of fluid flow that in diffuser/nozzle component which its divergence angle was 7.0°, 9.8°, 13.0° under different Womersley number and harmonic pressures which its amplitude was 10, 30 and 50 kPa, analysis was performed by the finite element software. Simulation results shows that: greater the Womersley number, the change of the flow which relate to the lag of the pressure will greater; greater the pressure amplitude, the change of the flow which relate to the lag of the pressure will decrease. When the pressure amplitude is 30, 50 kPa, the phenomenon that the peak of flow increases with the increase of Womersley number will occur in the diffuser component when Womersley number is relatively small. With the change of driving frequency, the rectification efficiency exists an optimal value. The peak of rectification efficiency and Womersley number in this peak place will rise with the increase of pressure amplitude.
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页码：1036 / 1042
页数：6
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