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Micromachines 2017, 8(1), 21;

Comparative Influences of Fluid and Shell on Modeled Ejection Performance of a Piezoelectric Micro-Jet

State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150001, China
Aero Engine Corporation of China (AECC), Harbin Dongan Engine Corporation Limited, Harbin 150001, China
Author to whom correspondence should be addressed.
Academic Editors: Ulrich Schmid and Michael Schneider
Received: 21 November 2016 / Revised: 4 January 2017 / Accepted: 10 January 2017 / Published: 13 January 2017
(This article belongs to the Special Issue Piezoelectric MEMS)
View Full-Text   |   Download PDF [5443 KB, uploaded 13 January 2017]   |  


The piezoelectric micro-jet, which can achieve the drop-on-demand requirement, is based on ink-jet technology and small droplets can be ejected out by precise control. The droplets are driven out of the nozzle by the acoustic pressure waves which are generated by the piezoelectric vibrator. The propagation processes of the acoustic pressure waves are affected by the acoustic properties of the fluid and the shell material of the micro-jet, as well as the excitations and the structure sizes. The influences of the fluid density and acoustic velocity in the fluid on the nozzle pressure and support reaction force of the vibrator are analyzed in this paper. The effects of the shell material on the ejection performance are studied as well. In order to improve the ejection performance of the micro-jet, for ejecting a given fluid, the recommended methods of selecting the shell material and adjusting excitations are provided based on the results, and the influences of the factors on working frequencies are obtained as well. View Full-Text
Keywords: piezoelectric micro-jet; ejection performance; modelling and simulation piezoelectric micro-jet; ejection performance; modelling and simulation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Li, K.; Liu, J.-K.; Chen, W.-S.; Zhang, L. Comparative Influences of Fluid and Shell on Modeled Ejection Performance of a Piezoelectric Micro-Jet. Micromachines 2017, 8, 21.

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