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.
何秀华, 王 健, 杨 嵩, 毕雨时, 禚虹彩. 三通全扩散／收缩管无阀压电泵的流阻性能[J]. 排灌机械工程学报, 2010, 28(6): 497-501.
He Xiuhua， Wang Jian， Yang Song， Bi Yushi， Zhuo Hongcai. Flow resistance characteristics of valveless piezoelectric pump with three way diffuser/nozzle tube. Journal of Drainage and Irrigation Machinery Engin, 2010, 28(6): 497-501.
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