|
|
|
| Flow resistance characteristics of valveless piezoelectric pump with three way diffuser/nozzle tube |
| He Xiuhua， Wang Jian， Yang Song， Bi Yushi， Zhuo Hongcai |
| (School of Energy and Power Engineering, Jiangsu University, Zhenjiang， Jiangsu 212013, China) |
|
|
|
|
Abstract For the disadvantage of inefficient of the traditional diffuser/nozzlebased valveless piezoelectric pumps, a new type of valveless piezoelectric pump with three way diffuser/nozzle tube was proposed through the advanced design by analyzing the flow characteristics of the traditional diffuser/nozzle tube. Based on the numerical simulation, the threeway diffuser/nozzle tube and traditional diffuser/nozzle tube was compared. The effects of the flow resistance property of the three way tube was analyzed by changing the structural parameters of the shunts, including the length L2, the angle φ, the cone angle θ2 and the width b2 of the shunts. Compared with the traditional tube, the results show that the λ which is the ratio of the reverse flow resistance coefficient to forward flow resistance coefficient as a function of Reynolds number, is higher under high Reynolds number. So the efficiency of the valveless piezoelectric can be increased. The optimum structural parameters of the threeway diffuser/nozzle tube differ greatly under different Reynolds number. The appropriate structural parameters should be chosen according to the actual working condition when designing.
|
|
Received: 31 March 2010
Published: 30 November 2010
|
|
|
|
| [1]焦小卫,黄卫清,赵淳生.压电泵技术的发展及其应用[J].微电机,2005,38(5):66-69.Jiao Xiaowei,Huang Weiqing,Zhao Chunsheng.The piezoelectric pump technology and its application[J].Micromotors Servo Technique,2005,38(5):66-69.(in Chinese)[2]何秀华,张睿,蒋权英.基于MEMS的压电泵及其研究进展[J].排灌机械,2007,25(4):64-68.He Xiuhua,Zhang Rui,Jiang Quanying.Progress on piezoelectric micropump based on MEMS[J].Drainage and Irrigation Machinery,2007,25(4):64-68.(in Chinese)[3]Liu G,Shen C,Yang Z,et al.A disposable piezoelectric micropump with high performance for closed-loop insulin therapy system[J].Sensors and Actuators A,2010,163(1):291-296.[4]Stemme E,Stemme G.A valveless diffuser/nozzle based fluid pump[J].Sensors and Actuators A,1993,39(2):159-167.[5]李军,吴博达,程光明,等.收缩管/扩张管型无阀压电泵的工作原理[J].压电与声光,2000,22(6):376-378.Li Jun,Wu Boda,Cheng Guangming,et al.The principle of diffuser/nozzle based valveless piezoelectric pump[J].Piezoelectrics ＆ Acoustooptics,2000,22(6):376-378.(in Chinese)[6]Heschel M,Mullenborn M,Bouwstra S.Fabrication and characterization of truly 3-D diffuser/nozzle microstructures in silicon[J].Journal of Microelectromechanical Systems,1997,6(1):41-47.[7]Singhal Vishal,Garimella,S V.Low Reynolds number flow through nozzle-diffuser elements in valveless micropumps[J].Sensors and Actuators A,2004,113:226-235.[8]Wang Yichun,Hsu Juicheng,Kuo Pingchi,et al.Loss characteristics and flow rectification property of diffuser valves for micropump applications[J].International Journal of Heat and Mass Transfer,2009,52:328-336.[9]王伟,刘世炳,陈涛,等.无阀微泵泵腔中流体流动的有限元模拟与分析[J].MEMS器件与技术,2005(9):415-419.Wang Wei,Liu Shibing,Chen Tao,et al.Finite element simulation and analysis for flowing of liquid in chamber of valveless micropump[J].Micronanoelectric Tech-nolgy,2005(9):415-419.(in Chinese)[10]Gravesen P,Branebjerg J,Jensen O S.Microfluidics-a review[J].Journal of Micromechanics and Microengineering,1993,3(4):168-182. |
|
|
|
