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Experimental investigation on the spray characteristics of agricultural full-cone pressure swirl nozzle

International Journal of Agricultural and Biological Engineering 2023年第4期16卷 29-40页

作者： Xiuyun Xue Xufeng Xu Shilei Lyu Shuran Song Xin Ai Nengchao Li Zhenyu Yang Zhen Li College of Electronic Engineering(College of Artificial Intelligence) South China Agricultural UniversityGuangzhou 510642China National Citrus Industry Technical System Machinery Research Office Guangzhou 510642China Engineering Research Center for Monitoring Agricultural Information of Guangdong Province Guangzhou 510642China Meizhou SCAU-Zhensheng Research Institute for Modern Agricultural Equipment Meizhou 514781China

The spray characteristics of a full-cone pressure swirl nozzle have been investigated in this *** results were defined by Reynolds number,which focuses on the breakup of liquid film,droplet size,velocity,and liquid volume flux under different Reynolds numbers at the near-field *** spray structure was visualized using a high-speed camera,and the characteristics of droplets were measured using a Phase Doppler Anemometer(PDA)in both the radial and axial *** tests were carried out at varying spray pressures(0.2 to 1.0 MPa),corresponding to different Reynolds numbers(5369 to 12006).It was found that when the Reynolds number rises,the liquid became more unstable after leaving the nozzle,causing the liquid film to break up *** to the measurements of PDA,the coalescence of droplets increased due to the centrifugal ***’s more,the velocity of the droplets fluctuates significantly in the radial direction,and the droplets with a smaller particle size had a higher average *** the perspective of liquid distribution,the increase in Reynolds number caused the spray liquid to move in the radial direction *** contrast,the liquid volume distribution changed in the radial direction more obviously than in the axial direction,growing to the maximum along the radial direction and gradually *** can provide a reference for selecting operating parameters for actual agricultural spray operations and the design of electrostatic nozzles through the research on breakup and droplet characteristics.

关键词： full-cone pressure swirl nozzle droplet size droplet velocity liquid volume flux high-speed camera PDA

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