摘要
采用高速摄像机拍摄了收缩管/扩张管型无阀压电微泵泵腔中气泡的变化,包括进入、移动、合并和分离等过程。同时,采用压阻式微型压力传感器测试无阀压电微泵泵腔的压力脉动。实验结果表明气泡进入泵腔之后,流体有效体积弹性模量和无阀微泵压力脉动幅值明显减少,气泡的进入使无阀微泵的工作性能大大降低,甚至导致微泵无法正常工作;而气泡移动、合并和分离对流体有效体积弹性模量和微泵的动态特性影响较小。
The actions of bubbles in a piezoelectric valve-less nozzle/diffuser micropump,including entrance,movement,combination and separation in the pump chamber,are recorded by a high speed video camera.A piezoresistive micro pressure transducer is used to measure the pressure pulsations in the piezoelectric valve-less micropump chamber.Experimental results show that the effective bulk modulus of fluid and the amplitude of pressure pulsations in the valve-less micropump decrease significantly with the bubbles into the pump chamber.The entrance of bubbles can lead to performance deterioration and even complete failure of the micropump.However,the movement,combination and separation of bubbles have little effect on the effective bulk modulus of fluid and the dynamic characteristics of micropump.
出处
《实验流体力学》
EI
CAS
CSCD
北大核心
2010年第3期34-38,62,共6页
Journal of Experiments in Fluid Mechanics
基金
教育部留学回国基金项目(24403604)
浙江大学流体传动及控制国家重点实验室开放基金项目(GZKF-2007002)
关键词
无阀微泵
气泡
高速摄像
压力脉动
valve-less micropump
bubble
high-speed video
pressure pulsation
