风幕式喷杆喷雾雾滴特性与飘移性能试验  

Experimental Investigation of Droplet Characteristics and Drift Performance in Air-assist Boom Sprayer

作　　者：贾卫东[1] 闻志勇 燕明德[2] 欧鸣雄[1] 陈志刚[1] 董祥[2] 

机构地区：[1]江苏大学现代农业装备与技术教育部重点实验室,江苏镇江212013 [2]中国农业机械化科学研究院,北京100083

出　　处：《农机化研究》2017年第4期162-167,共6页Journal of Agricultural Mechanization Research

基　　金：国家自然科学基金项目(51475215);"十二五"国家科技支撑计划项目(2014BAD08B04);江苏省高校自然科学研究重大项目(13KJA210001);公益性行业(农业)科研专项(201203025-04);江苏省农机三新工程项目(NJ2015-12)

摘　　要：为了描述风幕式喷杆喷雾雾滴特性与飘移性能之间的关系,运用激光粒度分析仪、粒子图像测速(PIV)和集雾试验测量装置对Lechler标准扇形喷头ST110-01在不同喷雾压力、风幕出风口风速和喷雾高度情况下的雾滴粒径、速度分布和飘移进行了试验,但飘移率逐渐变大;在400~600mm时,增大喷雾高度使雾滴粒径变大,雾滴的运动速度逐渐变小且飘移率变小;增大风幕出风口风速使雾滴粒径变小,此时喷雾高度对雾滴飘移率有着很大的影响。该研究可为正确设定喷雾系统运行参数等提供参考,对风幕式喷杆喷雾能够合理地喷施药液、减少雾滴的飘移和增大雾滴覆盖面积具有重要意义。In order to study the relationship between the droplet characteristics and drift in the air-assist boom sprays, the droplet diameter, distribution of velocities and drift were tested by Lechler nozzle st110-01 at different spraying pres- sure for different wind speed with various distances between the nozzle and the target, using the laser particle size analysis system, PIV analysis system and the collection spray test equipment. Analyse and discuss the relationship between the droplet diameter, velocity and drift. Experimental results showed that the droplet diameter decreased, the droplet velocity increased and drift increased with the increasing of the spraying pressure ; the droplet diameter increased, the droplet ve- locity and drift decreased gradually with the increasing of the distances between the nozzle and the target （400mm- 600mm） ; the droplet diameter decreased with the increasing of wind speed, the distance between the nozzle and the tar- get has a great influence on the droplet drift. The research can provide a reference for the proper use of spraying system operation parameters, and the research has a significance in reasonably spraying pesticide, enhancing the efficiency of the air-assist boom sprayer, decreasing the drift efficiency and increasing the droplet coverage areas.

关 键 词：风幕式喷杆喷雾 雾滴粒径 雾滴速度 飘移 喷雾流场 

分 类 号：S491[农业科学—植物保护]