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SIMULATION AND ANALYSIS OF SPRAY DISTRIBUTION AND DROPLET SIZE OF LARGE SPRINKLER MACHINES LOADED WITH ATOMIZING MICRO-SPRINKLERS
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DOI：10.22190/FUME241203017C.png)
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Abstract
En 中文
Current agricultural spraying faces issues such as excessive application, pesticide waste, and environmental pollution. This paper analyzes the hydraulic performance of several atomizing micro-sprayers (hollow cone, solid cone, and fan-shaped) used in large-scale irrigation machines, providing a theoretical basis for selecting spraying nozzles. Three types of micro-sprayers were tested at pressures of 0.2MPa, 0.3MPa, and 0.5MPa, and ground heights of 0.5m, 0.8m, 1.2m, and 1.5m. Each test was repeated three times. The results show that: (1) The hollow cone sprayer has a bimodal water distribution, the solid cone is unimodal, and the fan-shaped sprayer is long-strip shaped. As pressure increases, water distribution increases, while height increases reduce water distribution. (2) The droplet size distribution follows a normal distribution. Higher pressure increases the number of larger droplets, while lower pressure increases smaller droplets. Larger aperture sprayers generate more droplets, with the fan-shaped sprayer producing the most. (3) The particle size of the hollow cone sprayer ranges from 0.312mm to 1.187mm, with speeds below 1.4m/s; the solid cone sprayer ranges from 0.312mm to 6.5mm, with speeds below 2.4m/s; and the fan-shaped sprayer ranges from 0.312mm to 2.75mm, with speeds below 2.5m/s. The experimental results provide a theoretical basis for selecting and using atomizing micro-sprayers in large-scale irrigation, offering guidance for reducing pesticide use and improving agricultural efficiency.
Keywords:
Pesticide application
Large-scale irrigation machine
Atomizing micro-sprayer
Particle size
Velocity
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