Evaluating effective swath width and droplet distribution of aerial spraying systems on M-18B and Thrush 510G airplanes  

作　　者：Zhang Dongyan Chen Liping Zhang Ruirui Xu Gang Lan Yubin Wesley Clint Hoffmann Wang Xiu Xu Min 

机构地区：[1]Beijing Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China [2]National Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China [3]Key Laboratory of Agri-informatics,Ministry of Agriculture,Beijing 100097,China [4]Beijing Key Laboratory of Intelligent Equipment Technology for Agriculture,Beijing 100097,China [5]Sino-US Agricultural Aviation Cooperative Technology Center,Beijing,China and College Station,TX,USA [6]United States Department of Agriculture(USDA),Agricultural Research Service(ARS),Aerial Application Technology Research Unit,College Station,TX 77840

出　　处：《International Journal of Agricultural and Biological Engineering》2015年第2期21-30,共10页国际农业与生物工程学报（英文）

基　　金：funded by the 863 National High-Tech R&D Program of China(Grant No.2012AA101901);National Natural Science Foundation of China(Grant No.41301471);China Postdoctoral Special Foundation(Grant No.2013T60189);International Postdoctoral Exchange Fellowship Program(Grant No.20130043).

摘　　要：Aerial spraying plays an important role in promoting agricultural production and protecting the biological environment due to its flexibility,high effectiveness,and large operational area per unit of time.In order to evaluate the performance parameters of the spraying systems on two fixed wing airplanes M-18B and Thrush 510G,the effective swath width and uniformity of droplet deposition under headwind flight were tested while the planes operated at the altitudes of 5 m and 4 m.The results showed that although wind velocities varied from 0.9 m/s to 4.6 m/s,and the directions of the atomizer switched upward and downward in eight flights,the effective swath widths were kept approximately at 27 m and 15 m for the M-18B and Thrush 510G,respectively,and the latter was more stable.In addition,through analyzing the coefficients of variation(CVs)of droplet distribution,it was found that the CVs of the M-18B were 39.57%,33.54%,47.95%,and 59.04% at wind velocities of 0.9,1.1,1.4 and 4.6 m/s,respectively,gradually enhancing with the increasing of wind speed;the CVs of Thrush 510G were 79.12%,46.19%,14.90%,and 48.69% at wind velocities of 1.3,2.3,3.0 and 3.4 m/s,respectively,which displayed the irregularity maybe due to change of instantaneous wind direction.Moreover,in terms of the CVs and features of droplet distribution uniformity for both airplanes in the spray swath,choosing smaller CV(20%-45%)as the standard of estimation,it was found that the Thrush 510G had a better uniform droplet distribution than the M-18B.The results provide a research foundation for promoting the development of aerial spraying in China.

关 键 词：aerial spraying effective swath width droplet distribution coefficients of variation agricultural airplane 

分 类 号：R74[医药卫生—神经病学与精神病学]