摘要
扩张管/收缩管作为无阀微泵的关键组件,其结构参数直接影响微泵的泵送效率和工作性能。本文作者利用有限元软件ANSYS/Flotran对扩张管和收缩管内流体进行了数值模拟,结果表明:在不同的进出口压差下效率随扩张角的变化趋势不同;扩张管无论是在高压下还是低压下,都会出现压力复现,而分离流动和回流只会出现在高压或较大扩张角的情况下;收缩管内流体流动稳定,则不会出现压力复现、分离流动和回流。
Diffuser/nozzle element is a key subassembly of valveless micropump, its structure parameters influence the efficiency and performance of micropump directly. The software ANSYS/Flotran based on finite element method was used to numerically simulate the fluid of diffuser and nozzle elements. The results indicate that relationship between effiency and diffuser angle varies under different pressure, there is pressure recovery both under high pressure and low pressure, but flow separation and reflux appear in diffuser element only under high pressure and or lager diffuser angle. For the flow stabihy in nozzle element, there is no pressure recovery, flow separation and reflux.
出处
《机床与液压》
北大核心
2008年第12期61-63,共3页
Machine Tool & Hydraulics
基金
国家自然科学基金资助项目(50475104)
浙江省自然科学基金重点资助项目(Z106519)
