Experimental Study on the Droplet Size and Charge-to-Mass Ratio of an Air-Assisted Electrostatic Nozzle

被引:13
|
作者
Dai, Shiqun [1 ,2 ]
Zhang, Jiayao [1 ,2 ]
Jia, Weidong [1 ,2 ]
Ou, Mingxiong [1 ,2 ]
Zhou, Huitao [1 ,2 ]
Dong, Xiang [3 ]
Chen, Hong [2 ]
Wang, Ming [2 ]
Chen, Yu [2 ]
Yang, Shuai [2 ]
机构
[1] Jiangsu Univ, High Tech Key Lab Agr Equipment & Intelligence Ji, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ, Sch Agr Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[3] Chinese Acad Agr Mechanizat Sci, State Key Lab Soil Plant Machinery Syst Technol, Beijing 100083, Peoples R China
来源
AGRICULTURE-BASEL | 2022年 / 12卷 / 06期
关键词
air-assisted electrostatic nozzle; droplet size; charge-to-mass ratio; SPRAY; DEPOSITION; PRESSURE; DYNAMICS; IMPACT; FLOW;
D O I
10.3390/agriculture12060889
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
An air-assisted electrostatic nozzle uses a combination of air-assisted atomization and electrostatic spray technology. This article optimizes the existing air-assisted electrostatic nozzles in terms of structural design to obtain a higher charge-to-mass ratio and a smaller droplet size. The optimized air-assisted electrostatic nozzle was studied experimentally, and the effects of liquid pressure, air pressure and applied voltage on the droplet size and charge-to-mass ratio were investigated. Comparing the effects of air pressure, liquid pressure and applied voltage on the charge-to-mass ratio and droplet size, the relationship curves of the droplet size and charge-to-mass ratio under each voltage were fitted using the Rayleigh charge limit theory. For a higher CMR during the spray operation, applied voltages between 2.5 kV and 3 kV, an air pressure between 0.4 bar and 0.6 bar, and a liquid pressure of less than 0.9 bar could be chosen. The optimized air-assisted electrostatic nozzles not only have small droplets but also have high charge-to-mass ratios, reducing the need for pesticide use and thus protecting human health and the environment.
引用
收藏
页数:15
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