Experimental Study on Size and Velocity of Charged Droplets

Wang, Zhentao; Zhang, Yonghui; Guo, Tianyu; Zhu, Zhonghui; Wang, Xiaoying; Jian-long, Wen

doi:10.1016/j.proeng.2015.11.295

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…The electrostatic spray has a smaller droplet size, which can make the droplets atomize evenly, increase target deposition, and improve contact opportunities with pests. This can greatly reduce the use of pesticides and improve the utilization rate [1][2][3][4][5][6][7] . Using fixed-wing aircraft or unmanned aerial vehicle (UAV) to spray pesticides is not restricted by terrain and has high operating efficiency, which is widely applied in many countries and regions in the world [8][9][10][11] .…”

Section: Introduction 1mentioning

confidence: 99%

Development of a charge transfer space loop to improve adsorption performance in aerial electrostatic spray

Zhao

Lan

Wang

et al. 2020

International Journal of Agricultural and Biological Engineering

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In order to solve the problem of insufficient adsorption rate of droplets on the target back via aerial electrostatic spray, this study proposed a high-voltage electrostatic generator to charge the liquids in two isolated water tanks with positive and negative charges respectively. A charge transfer loop was developed in space between the aerial electrostatic spray system and the ground. This method greatly enhanced the adsorption performance under outdoor conditions that 16.7% droplets density increased on the target front, a nearly fourfold destiny increased on the target back compared with the conventional UAV spray system. The target back-to-front ratio of droplet density was improved from 6.1% to 25.7%, which validated the satisfactory performance of the developed system.

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Section: Introduction 1mentioning

confidence: 99%

Development of a charge transfer space loop to improve adsorption performance in aerial electrostatic spray

Zhao

Lan

Wang

et al. 2020

International Journal of Agricultural and Biological Engineering

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Numerical Simulation of the Trajectory of UAVs Electrostatic Droplets Based on VOF-UDF Electro-Hydraulic Coupling and High-Speed Camera Technology

Liu

et al. 2023

Agronomy

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The electrostatic spray technology can significantly improve the utilization rate of liquid medicine under the operation characteristics of unmanned aerial vehicles (UAVs) with small load and low spray volume. To explore the settlement law of electrostatic droplets, further improve the amount of droplets deposited in target crops, and reduce the loss of missing target, this study adopted the method of combining numerical simulation and high-speed photography to study the movement characteristics of electrostatic droplets of UAV induction conical electrostatic nozzle. Based on the droplet spatial dynamics theory, a user-defined function and volume of fluid (UDF-VOF) multiphase spray model is established to simulate the trajectory of electrostatic droplet. TEMA software is used to analyze the droplet motion image under electrostatic field, and the characteristic parameters, such as trajectory and velocity are obtained. Theoretical analysis and spray test results show that the main factors affecting electrostatic droplet settlement are charging voltage, droplet falling distance, and airflow velocity. The optimal charging voltage of electrostatic droplet is 14 kv, the maximum charge-mass ratio is 1.04 mC/kg, and the average particle size is 209.77 μm. The numerical simulation results show that spray height, charging voltage, and lateral wind speed have significant effects on droplet sedimentation. The results of high-speed camera analysis show that the induced electric field causes the droplet to adsorb the target crop, resulting in the droplet movement trajectory deflection.

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Experimental Study on Size and Velocity of Charged Droplets

Cited by 2 publications

References 7 publications

Development of a charge transfer space loop to improve adsorption performance in aerial electrostatic spray

Development of a charge transfer space loop to improve adsorption performance in aerial electrostatic spray

Numerical Simulation of the Trajectory of UAVs Electrostatic Droplets Based on VOF-UDF Electro-Hydraulic Coupling and High-Speed Camera Technology

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