无阀微泵锯齿形流道仿真模拟

Simulation of Saw-Tooth Channel for Valveless Micropumps

介绍了无阀微泵的特点及其工作原理,提出一种应用于无阀微泵新型锯齿形流道.针对锯齿形流道不同开口角度,用CFD(computational fluid dynamics)软件进行了仿真模拟,得出了流道内速度和压力变化规律.分析了压力和流量的分布特征及关系曲线,为锯齿形流道微泵理论研究和优化设计提供了依据,并与单级锥形扩散/收缩流道作对比.结果证明,此锯齿形流道相对于锥形扩散/收缩流道可以提高微泵效率.

The operating principle and flow characteristic of valveless micropumps are introduced. A new type of saw-tooth channel for valveless micropumps is proposed. The saw-tooth channel in different angels is simulated with the CFD （computational fluid dynamics ） software. The velocity and pressure distributing are presented, and the characteristic curve of the pressure and flow rate drawn compared with the single taper pipe. The results show that the saw-tooth channel can enhance efficiency of the micropumps in comparison with the diffuser/nozzle channel. It provides a reliable basis to theoretical study and optimal design of saw-tooth micropumps.