Title :
A circular bend mode piezoelectric micro-droplet ejection generator for spatial lubrication
Author :
Mingwei Sheng ; Weishan Chen ; Junkao Liu ; Shengjun Shi
Author_Institution :
State Key Lab. of Robot. & Syst., Harbin Inst. of Technol., Harbin, China
Abstract :
The paper reaches into a circular bend mode piezoelectric micro-droplet ejection generator, and a complete relation model from the voltage pulse applied on the piezoelectric transducer to ejection parameters of high viscosity aerospace lubricant droplet was established. Based on the Finite Element Analysis (FEM), transient response analysis of FEM modal was carried out, and the vibration equation of circular piezoelectric transducer was obtained by means of curve fitting. Multi-phase computational fluid dynamics (CFD) software was involved, and the gas liquid two-phase flow near the nozzle was established. To solve the interface movements with continuing topology changes, volume-of-fluid method (VOF) along with the piecewise linear interface construction (PLIC) techniques were implemented to describe the interfacial movements. A computational approach based on VOF method was applied to analyze the ejection process of lubricant droplet. And the effects of internal factors consist of dynamic viscosity and surface tension on the ejection parameters were investigated emphatically.
Keywords :
computational fluid dynamics; curve fitting; drops; finite element analysis; lubrication; microfluidics; piezoelectric transducers; transient response; two-phase flow; CFD software; FEM modal; PLIC technique; VOF method; circular bend mode piezoelectric microdroplet ejection generator; circular piezoelectric transducer; curve fitting; finite element analysis; high viscosity aerospace lubricant droplet; multiphase computational fluid dynamic software; piecewise linear interface construction techniques; transient response analysis; vibration equation; volume-of-fluid method; Aerodynamics; Finite element methods; Generators; Lubricants; Mathematical model; Surface tension; Viscosity; ejection generator; gas liquid two-phase flow; transient response analysis; volume-of-fluid;
Conference_Titel :
Electronic and Mechanical Engineering and Information Technology (EMEIT), 2011 International Conference on
Conference_Location :
Harbin, Heilongjiang, China
Print_ISBN :
978-1-61284-087-1
DOI :
10.1109/EMEIT.2011.6023401