摘要
为降低无人机农林喷洒作业的重喷率和漏喷率,基于CFD建立共轴双旋翼植保无人机下洗气流的雷诺平均N-S控制方程和三维物理模型,研究该机型喷洒植被的最佳作业高度。考虑作业环境干扰、喷射幅度和渗透率的要求,利用ANSYS仿真平台,模拟旋翼流场的云图、矢量图及迹线图,从而确定最佳作业高度;并以大疆T50和田间玉米地布置水敏纸记录雾滴的大小和分布作为实例验证,选择2~5 m/s作业速度分别距农作物顶部1~2 m试验高度,得出1.5 m作业高度下雾滴的最佳覆盖率及沉积量,验证共轴双旋翼下洗气流植保喷洒仿真的准确性。
To reduce heavy spraying and leakage of UAV agricultural and forestry spraying operations,Reynolds mean N-S equation of downwash airflow of a coaxial bi-rotor drone was given out and three-dimensional physical model was established using Computational Fluid Dynamics(CFD)to determine the optimal operating height for spraying vegetation with this model.Considering the operational environment interference,spray amplitude and penetration requirements,calculations and ANSYS platform was used to simulate performance.Cloud maps,vector diagrams and trace diagrams of rotor flow field were obtained to determine the optimal operating height of this model.In addition,the DJI T50 and the corn field were used to record the size and distribution of fog droplets with water-sensitive paper as an example.The operation speed is selected from 2m/s to 5m/s,and the test height is 1mto 2mabove the top of the crop.The optimal coverage rate and deposition amount of fog droplets at 1.5moperation height are obtained,and the accuracy of the simulation of plant protection spraying under coaxial bi-rotor downwash airflow is verified.
作者
陈华群
杨君
杨伟超
CHEN Huaqun;YANG Jun;YANG Weichao(College of Air Traffic Management,Civil Aviation Flight University of China,Guanghan 618307,Sichuan,China)
出处
《科技和产业》
2025年第18期58-64,共7页
Science Technology and Industry
基金
西藏自治区科技计划项目(XZ202403ZY0014)
四川省科技计划资助(23ZDYF0586)
中国民用航空飞行学院大学生创新创业项目(202410624026)。
关键词
农林植保
共轴双旋翼无人机
下洗流场
CFD方法
数值模拟
agricultural and forestry plant protection
coaxial bi-rotor UAV
down-wash flow field
CFD method
numerical simulation
