Movement and deposition of the droplets in a downwash flow field of a multi-rotor agricultural UAV
Influenced by the complex downwash flow field of the rotors,the movement and deposition of the droplets sprayed by agricultural UAV remained an unclear research domain.Instead of the field experiment,a high speed PIV method was used to measure the movement and deposition of the droplets at different rotating speed of the rotors(1000 RPM to 3000 RPM)or at different transverse injecting points(20cm to 50cm away from the rotors)in the downwash flow field of an agricultural UAV with 8 rotors and conical nozzles.The maximum speed and the size of th e high speed zone of the droplets are found greatly influenced by the downwash velocity.The initial spray angle of the nozzle declines with the increase of downwash flow speed.The downwash velocity was found not only could change the deposition zone of t he droplets,but also influenced their distribution.The increase of the downwash velocity will increase the deposition uniformity of the droplets.The nozzle position in the downwash flow field could also influence the deposition of the droplets.When the distance between the nozzle and the downwash flow is increased,the deposition peak near the downwash flow grows simultaneously.However,the spray angle of the nozzle,and the distance between the deposition peak and the nozzle,stay constant.
Spray deposition UAV flow field rotor
Tang Qing Zhang Bin Chen Liping Zhang Ruirui Xu Min Yi Tongchuan Hou Jiajian
National Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China National Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China;School of Ast
国内会议
广州
英文
185-195
2016-11-12（万方平台首次上网日期，不代表论文的发表时间）