摘要
采用流固耦合的方法,对三通全扩散/收缩管单腔无阀微泵进行了数值模拟计算,并进行试验验证,结果表明:当激励电压幅值为100 V时,在50～175 Hz范围内,微泵的流量随频率的增大而增大,计算值与试验值的最大误差为12%;当确定频率为100 Hz时,微泵流量随电压的增大而线性增大;试验结果较好地验证了数值模拟方法的可行性.在此基础上,针对单腔无阀微泵低流量、低输出压力的缺点,设计并研究了基于三通全扩散/收缩管的并联结构无阀压电泵.应用上述数值模拟方法,分析了并联结构下两振子振动相位差对微泵流量的影响,绘制出了不同相位差下并联微泵流量图和微泵在1个周期内瞬时流量图,并与单腔结构的微泵进行了性能对比.结果表明:并联结构下微泵流量随振子振动相位差的变化不大;在相位差为180°时流量最大,为0.367 mL/min;在相位差为360°时微泵实现了流量的连续输送,其流量为0.349 mL/min,性能较单腔结构微泵有了较大的提高.
The fluid-structure interaction （FS1） method was adopted to simulate the fluid flow in a valveless piezoelectric pump with three-way diffuser/nozzle tube, and then a comparison is made with the experiment results. As the 100 V excitation voltage is applied, the flow rate increases against in- creasing frequency （50 - 175 Hz） ; the maximum error of flow rate between FS1 computation and ex- periment is 12%. At the frequency of 100 Hz the flow rate increases with voltage linearly. The experi- mental data confirmed such computed results, suggesting the FSI simulation method is feasible for this micro-pmnp. Moreover a parallel double-chamber valveless piezoelectric micro-pump with three-way diffuser/nozzle tube was designed to improve output flow rate an^t pressure of the traditional single chamber valveless piezoelectric pump. Effects of difference in phase of the two vibrators on flow rate in tile double-chamber micro-pump were analyzed by the FSI method, and the transient flow rate plots in one circle were established under various differences of phase, eventually compared with those of the single-chamber pump. The results indicated the flow rate shows a little change with difference of phase in the parallel double-chamber micro-pump. However, a continuous fluid transport was realized in the double-chamber pump in one cycle, for example, as the difference of phase is 180°, the flow rate is 0.367 mL/min, and as the difference of phase is 360°, the flow rate is 0.349 mL/min.
出处
《排灌机械工程学报》
EI
北大核心
2013年第1期20-24,共5页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(51276082)
江苏高校优势学科建设工程项目
关键词
无阀压电泵
三通全扩散
收缩管
流固耦合
试验对比
并联结构
valveless piezoelectric pump
three-way diffuser/nozzle tube
fluid structure interaction
experiment comparison
parallel structure
