Design and experiment of low-frequency ultrasonic nozzle integrating air-assistant system and acoustic levitation mechanism

作     者：Jianmin Gao Mazhar Hussian Tunio Yiming Chen Rui He 

作者机构：School of Agricultural EngineeringJiangsu UniversityZhenjiang 212013China 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2020年第13卷第6期

页      面：25-33页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：We acknowledge that this work was financially supported by the National Natural Science Foundation of China Program(No.51975255) Jiangsu Agriculture Science and Technology Innovation Fund(CX(18)3048) and the“Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(No.37,(2014)) 

主　　题：nozzle ultrasonic atomization droplet sonic levitation air-assistant 

摘      要：Ultrasonic atomization nozzles are generally divided into two categories:high frequency and low-frequency ultrasonic atomization *** with high-frequency ultrasonic atomization nozzles(working frequencies1 MHz),low-frequency ultrasonic atomization nozzles are not sensitive to clarity,temperature and viscosity of the ***,they can control atomization quantity precisely,but the sizes of droplets generated by them are relatively *** aeroponics cultivation,and precision welding,in such both cases,precise spraying control and tiny droplet sizes are ***,how to decrease droplet size using low-frequency ultrasonic atomization nozzles is a valuable *** this paper a 60 kHz low-frequency ultrasonic atomization nozzle integrating air-assistant system and acoustic levitation mechanism was proposed and ***,the design was verified by FEA(Finite Element Analyzes)and impedance analyzer PV70A,and the verified results indicated relative design error was 0.49%.Driving voltage,spout angle,air pressure and levitating ball were taken as influential factors in the experimental protocol to the character in spray properties of this designed nozzle.A laser particle size analyzer was used to measure droplet *** results indicated that:the diameters of droplets generated by this nozzle at driving voltage 46 V were smaller than those at 40 V driving voltage;Both the assistant air and levitation mechanism could effectively change the diameters and uniformity of droplets;The minimum values of D10,D50,and D90(D10,D50 and D90 were mean diameters when cumulative percentages of the samples’diameter were 10%,50%and 90%,respectively)were 23.06μm,31.14μm and 41.38μm,***,all those minimum values were presented at the same run(spout angle 0°,air pressure 0.05 MPa,having levitated ball,driving voltage 46 V);Levitating ball above the atomization surface would make droplet sizes more uniform and *** important