Pressure Wave and Fluid Velocity in a Bend-Mode Inkjet Nozzle with Double PZT Actuators

作     者：Sungu Kim Jaeyong Sung Myeong Ho Lee 

作者机构：Graduate SchoolDept.of Mechanical EngineeringSeoulTech Dept.of Mechanical and Automotive EngineeringSeoulTech 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2013年第22卷第1期

页      面：29-35页

核心收录：

学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程] 

基　　金：supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education Science and Technology(2010-0009054) 

主　　题：double PZT actuators inkjet nozzle narrow channel theory pressure wave sequential actuation 

摘      要：A new concept of bend-mode inkjet nozzle with double PZT (lead zirconate titanate) actuators has been designed and fabricated in the present study. Then the pressure wave and fluid velocity at the nozzle exit have been investigated. The complex pressure behavior inside the channel was solved numerically based on the narrow channel acoustic theory. The two PZTs attached to a rectangular channel were actuated sequentially by setting the waveforms of each PZT to be center-aligned with various pulse widths. As a result, the double PZT actuation is superior to the single PZT actuation in view of strong momentum force and fast dissipation of residual pressure. The maximum fluid velocity at the nozzle exit is observed when the respective pulse widths equal to their optimum pulse widths. The numerical results are supported by the experimental results with the fabricated inkjet device by measuring the speed of meniscus just out of the nozzle.