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Theoretical analysis and numerical simulation of valveless piezoelectric pump with V-shape tube |
HE Xiu-hua, ZHANG Rui |
School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract Based on the flow characteristics in diffuser/nozzle,a new type of V-shape tube used in the valveless piezoelectric pump is proposed for micro total analysis systems.The structure and working principle of the valveless piezoelectric pump with V-shape tube are described.The average flow calculation formula and efficiency formula of the system are developed by analyzing the flow field theoretically.Finite Element Method is applied to the flow field in the V-shape tube to obtain pressure contours of positive and negative flows in it.By comparing the pressure loss coefficients in the V-shape tube,othe diffuser/ nozzle parallel connection and Y-shape tube,the first two curves of the ratios of pressure loss coefficient follow the same variation tendency.The reliability of numerical simulation is proved,which provides guidance for the design of piezoelectric pump.
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Received: 08 August 2013
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