• CN：11-2187/TH
• ISSN：0577-6686

›› 2014, Vol. 50 ›› Issue (16): 193-198.

• 论文 •

### 类分形Y形分叉流管无阀压电泵的流阻分析

1. 南京航空航天大学机械结构力学及控制国家重点试验室;江苏大学国家水泵及系统工程技术研究中心;中国科学院长春光学精密机械与物理研究所
• 发布日期:2014-08-20

### Analysis of the Flow Resistance Characteristics of Valveless Piezoelectric Pump with Fractal-like Y-shape Branching Tubes

HUANG Jun; ZHANG Jianhui; WANG Shouyin

1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics; National Research Center of Pumps, Jiangsu University; Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences
• Published:2014-08-20

Abstract: Most piezoelectric pumps employed in water cooling systems contain internal valves which increase the volume of the systems, affect the reliability of the pump, and cause noise. As valveless piezoelectric pump with fractal-like Y-shape branching tubes has simple processing characteristics of 2.5 dimensions, and multi-leveled braching flow can cover larger area which produces excellent heat dissipation, which can avoid shortcoming of traditional valve piezoelectric pump. Structure and working principle of valveless piezoelectric pump with fractal-like Y-shape branching tubes are introduced. Then, flow resistance characteristics of fractal-like Y-shape branching tube is analyzed by using fractal principle. Meanwhile, finite element software is employed to simulate the flow field of the pump, and the relationships between pressure drop and flow rate in inlet and outlet of this pump are obtained. Valveless piezoelectric pumps with fractal-like Y-shape branching tubes are fabricated, and flow resistance and back pressure experiments are conducted. The experimental results show that, the export flow rate along dividing flows is larger than merging flows at the same pressure drop. The maximum relative error between experimental and simulated results occurs, when pressure drop between inlet and outlet is 196 Pa, which is 90% and 89% along dividing and merging flows respectively. And the maximum back pressure of the valveless pump is 637 Pa under 100 V (9 Hz) power supply. The proposed researches ensure that flow resistances between merging and dividing flows are unequal and also validate the feasibility of the valveless piezoelectric pump with fractal-like Y-shape branching tubes.