Abstract
A new type of valveless piezoelectric micropump is presented. Synthetic jet and Coanda effect are utilized to achieve larger and bidirectional flow rate. The numerical simulation applying the velocity and pressure boundary conditions as well as the SST turbulence model were utilized to research the performance and internal flow state of the micropump. The simulation method was tested by the previous experimental data and the results matched well. The results suggest that the flow rate of the micropump is related to the Reynolds number and frequency. The entrainment flow rate of synthetic jet accounts for over 80% of the total outflow rate. The outflow rate is much larger than the volume change of the micropump chambers. There is an optimal frequency to obtain the maximum flow rate regarding the volume change of the chambers as a constant. The fluctuation of the flow rate decreases with the increase of frequency. When the frequency is higher than 25 Hz, the outflow can be continuous. Working at the Reynolds number of 1000 and optimal frequency of 50 Hz, the flow rate is 6.8 ml/min.
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Recommended by Guest Editor Gihun Son and Hyoung-Gwon Choi
Xiuhua He received the B.S. degree in Hydraulic Machinery from Zhenjiang Institute of Agricultural Machinery in 1982, the M.S. degree in Fluid Machinery and Hydrodynamic Engineering from Jiangsu University of Science and Technology in 1991, and the Ph.D. degree in Fluid Machinery and Engineering from Jiangsu University in 2010. She is currently a Professor at School of Energy and Power Engineering, Jiangsu University, China. Her research interests include the performance and internal flow of fluid machinery.
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He, X., Xu, L., Zhang, X. et al. A bidirectional valveless piezoelectric micropump with three chambers applying synthetic jet. J Mech Sci Technol 30, 4015–4022 (2016). https://doi.org/10.1007/s12206-016-0814-1
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DOI: https://doi.org/10.1007/s12206-016-0814-1