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<p>To address the issues of excessive droplet drift and insufficient deposition on the underside of crop leaves, commonly observed in conventional boom sprayers, this study proposes a method that integrates contact electrostatic spraying technology with multi-nozzle boom spraying to mitigate these problems. Based on a comprehensive review of electrostatic spraying principles and key parameters of boom sprayers, contact charging was implemented on the boom sprayer. A series of indoor and field experiments were conducted to investigate the effects of various operational parameters on droplet atomization characteristics. The experimental results indicated that the optimal operating parameters for multi-nozzle contact electrostatic spraying were a charging voltage of 35&#xa0;kV, nozzle spacing of 300&#xa0;mm, spray pressure of 0.3&#xa0;MPa, and spraying height of 300&#xa0;mm. Under these conditions, the charge-to-mass ratio of droplets generated by the multi-nozzle configuration increased by 34.1% compared to the single-nozzle setup. Droplet size was reduced by 23.3% compared to non-electrostatic spraying. Additionally, on maize seedlings at the four-leaf stage, droplet deposition rates on the upper, middle, and lower layers of the leaf front surface increased by 23.6, 36.4, and 47.2%, respectively. These findings clearly demonstrate that contact electrostatic spraying significantly reduces droplet drift and enhances deposition on the leaf surface, particularly on the lower leaf surfaces. The study provides both theoretical support and practical guidance for improving boom sprayer performance and promoting the large-scale application of contact electrostatic spraying in agricultural spraying operations.</p>

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Multi-nozzle Atomization Characteristics of Contact Electrostatic Spray with Experimental Study

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Changkun Zhang,
  • Zengjia Luo,
  • Jinliang Gong,
  • Yanfei Zhang

摘要

To address the issues of excessive droplet drift and insufficient deposition on the underside of crop leaves, commonly observed in conventional boom sprayers, this study proposes a method that integrates contact electrostatic spraying technology with multi-nozzle boom spraying to mitigate these problems. Based on a comprehensive review of electrostatic spraying principles and key parameters of boom sprayers, contact charging was implemented on the boom sprayer. A series of indoor and field experiments were conducted to investigate the effects of various operational parameters on droplet atomization characteristics. The experimental results indicated that the optimal operating parameters for multi-nozzle contact electrostatic spraying were a charging voltage of 35 kV, nozzle spacing of 300 mm, spray pressure of 0.3 MPa, and spraying height of 300 mm. Under these conditions, the charge-to-mass ratio of droplets generated by the multi-nozzle configuration increased by 34.1% compared to the single-nozzle setup. Droplet size was reduced by 23.3% compared to non-electrostatic spraying. Additionally, on maize seedlings at the four-leaf stage, droplet deposition rates on the upper, middle, and lower layers of the leaf front surface increased by 23.6, 36.4, and 47.2%, respectively. These findings clearly demonstrate that contact electrostatic spraying significantly reduces droplet drift and enhances deposition on the leaf surface, particularly on the lower leaf surfaces. The study provides both theoretical support and practical guidance for improving boom sprayer performance and promoting the large-scale application of contact electrostatic spraying in agricultural spraying operations.