| Aimed at the characteristics of plant diseases and insect pests of agriculture and forestry, such as multiple, large area and flare-up, a set of aerial electrostatic spraying system applied on agricultural aircraft Y5B was developed and manufactured based on analyzing aerial electrostatic spraying system both at home and abroad.The aerial electrostatic spraying process was introduced including atomizing, charging, transporting and depositing process of droplets, and the basic electrostatic spraying theories and experiments were studied. Special electric potential and electric field emerged by tubular electrode of double-nozzle of aerial electrostatic sprayer were achieved by polar coordinates and mirror-charge method. The movement equation of droplets was set up and the expression about flying distance and vertical drop-down height variation with time of charged particle was obtained.Spray distribution probability model of aerial electrostatic nozzle was established. The time-increment method was adopted for settling the model of charged droplets moving trajectory model. According to particle system mechanism, modeling of atomizing and moving trajectory of droplets in different voltages were realized. Several aircraft flying experiments were developed and carried out with the aerial electrostatic spraying system mounted Y5B aircraft, including droplets deposition, effective swath and droplets drift and so on. The result showed that the spraying system had several advantages such as working steady, deposition increase, distribution uniform and drift decrease.Aerial electrostatic spraying is not only improving the application efficiency and decreasing environment pollution, but also attaining to prevention and cure in time aiming at plant diseases and insect pests with large area in forestry or agriculture and flare-up pests. The aerial electrostatic spraying system could be fully satisfied with actual agricultural and forestry production.
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