Influence of Wind Speed on the Motion Characteristics of Peach Leaves ( Prunus persica )

Guanqun Wang, Xiang Dong (), Weidong Jia, Mingxiong Ou, Pengpeng Yu, Minmin Wu, Zhi Zhang, Xinkang Hu, Yourui Huang and Fengxiang Lu
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Guanqun Wang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Xiang Dong: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Weidong Jia: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Mingxiong Ou: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Pengpeng Yu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Minmin Wu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Zhi Zhang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Xinkang Hu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Yourui Huang: School of Electrical and Optoelectronic Engineering, West Anhui University, Lu’an 237012, China
Fengxiang Lu: Jiangsu Yueda Intelligent Agricultural Equipment Co., Ltd., Yancheng 224007, China

Agriculture, 2024, vol. 14, issue 12, 1-12

Abstract: Air-assisted sprayers are widely used in orchards due to their efficiency in enhancing droplet penetration and deposition. These sprayers disperse droplets through a high-velocity airflow, which agitates the leaves and aids in canopy penetration. This study involved controlled experiments to simulate leaf movement during field spraying, with a focus on the dynamics of peach tree leaves ( Prunus persica ) in varying wind fields. An experimental setup consisting of a wind-conveying system, a measurement system, and a fixed system was designed. The moving speeds of the wind field (0.75 m/s, 0.5 m/s, and 1.0 m/s) and wind velocities (ranging from 2 m/s to 8 m/s) were varied. Key parameters, including leaf tip displacement, angular velocity, and twisting amplitude, were measured using high-speed cameras and motion analysis software. The results indicate that, at a constant wind velocity, increasing the wind field’s moving speed resulted in a reduced range of motion, decelerated angular velocity, and decreased twisting amplitude of the leaves. Notably, at a wind field speed of 8 m/s and a moving speed of 1.0 m/s, the twisting duration of the leaves was only 67% of that observed at a moving speed of 0.5 m/s. These findings suggest that wind speed and field motion characteristics play a crucial role in leaf dynamics, informing the design of air-assisted spraying systems.

Keywords: droplet penetration; wind field; leaf angular velocity; leaf twisting amplitude (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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