沈阳农业大学学报2025，Vol.56Issue(6)：31-44,14.DOI:10.3969/j.issn.1000-1700.2025.06.004
共轴双旋翼植保无人机旋翼气流作用下雾滴沉积分布特性研究
Distribution Characteristics of Droplet Deposition under Rotor Downwash Airflow of Coaxial Dual-Rotor Plant Protection UAV
摘要
Abstract
[Objective]In the plant protection UAV spraying operation process,the distribution characteristics of the rotor downwash airflow field play a key role in the droplet sedimentation effect.Study was carried out to reveal the airflow distribution patterns of the coaxial dual-rotor UAV,and to explore the influence of rotor airflow on the droplet deposition.[Methods]This study uses the fluid dynamics simulation software Fluent to conduct a numerical simulation of the rotor downwash airflow field and its droplet deposition characteristics of a coaxial dual-rotor UAV,and the simulation results were compared and verified with the field spray test results.[Results]The results of the numerical simulation show that the airflow intensity beneath the rotor decreases with the increase of distance from the rotor.The average speed of the droplet within the area directly beneath the rotor increases with the increase of UAV's rotor speed.When the rotor speeds are 2 000,2 400,2 800,and 3 200 r·min-1,the regions within approximately 2.0,3.5,5.5,and 6.5 m beneath the rotor are high-speed droplet,to the corresponding average droplet speeds of 11.5,13.5,15.5,and 17.5 m·s-1,respectively.With the increase of the UAV's rotor speed,the drift of droplets initially weakens and then strengthens.The field test results show that the average droplet deposition rate for each collection zone were 1.808,2.044,2.434,and 1.774 μL·cm⁻².When the tank capacity increased from 70%to 100%,the average droplet deposition rate decreased significantly from 2.434 to 1.774 μL·cm⁻².The corresponding drift rates were 13.20%,6.96%,1.30%,and 19.03%respectively.[Conclusion]Significance analysis shows that there are significant differences in the drift distribution of droplets under different load conditions during spraying.Comparing the test and simulation results,the average droplet deposition rate from the numerical simulation was lower;however,the trend of change in both test and simulation values remains highly consistent.The test verified the reliability of the numerical simulation model and can guide the implementation of field trials,to achie the objectives of precise spraying operations and optimizing spraying effects.关键词
植保无人机/共轴双旋翼/旋翼风场/雾滴沉积/模拟仿真Key words
plant protection UAV/coaxial dual-rotor/rotor airflow/droplet deposition/simulation分类
农业科技引用本文复制引用
陈盛德,郭健洲,徐小杰,黄诗敏,谭宇翔,吴泽鸿,兰玉彬..共轴双旋翼植保无人机旋翼气流作用下雾滴沉积分布特性研究[J].沈阳农业大学学报,2025,56(6):31-44,14.基金项目
国家重点研发计划项目(2023YFD2000200) （2023YFD2000200）
宁夏回族自治区重点研发计划项目(2024BBF01013) （2024BBF01013）
