摘要
针对风送式喷雾机气流腔室顶部气流较弱、风机吹出的高速气流无法被均匀的导向至各出风口的问题,应用STAR-CCM+流体仿真软件、采用正交试验法对风送式喷雾机的导流结构、入口风速等参数进行优化。利用STAR-CCM+软件对不同导流结构参数的喷雾机内部流场进行仿真分析,通过监测喷雾机出风口处的风速值,判断导流结构安装的合理性。通过调整导流结构的布置,改善喷雾机内部气流的导向过程,使得风机产生的高速气流可以被最大化的均匀导向至喷雾机各出风口处,调整气流在喷雾机顶部出风口处的分布效果。结果表明:当喷雾机入口风速为16 m/s,风机安装位置即风机圆心距地面450 mm,导流板5的安装角度为50°,内隔板安装夹角为20°时,各出风口监测点处的平均速度为22.57 m/s,塔型喷雾机各出风口速度均能满足作业需求且分布均匀,实现了果树不同高度冠层均匀着药的目的。
In order to solve the problem of weak airflow at the top of the airflow chamber of the air sprayer and the high-speed airflow blown by the fan cannot be uniformly guided to each air outlet,the STAR-CCM+fluid simulation software and the orthogonal test method were adopted to optimize and simulate the flow guiding structure and installation position of the air-driven sprayer.The STAR-CCM+software was used to simulate the internal flow field of the sprayer with different diversion structural parameters,and the rationality of the installation of the diversion structure was judged by monitoring the air speed value at the outlet of the sprayer.By adjusting the arrangement of the diversion structure,the airflow guiding process of the sprayer was improved,so that the high-speed airflow generated by the fan could be evenly guided to the outlets of the sprayer to adjust the distribution of air flow at the air outlet on the top of the sprayer.The results showed that when the inlet wind speed of the sprayer was 16 m/s,the center of the fan was 450 mm from the ground,the installation angle of the deflector 5 was 50°,and the installation angle of the inner partition was 20°,the average speed at each outlet monitoring point was 22.57 m/s,the speed of each outlet of the tower sprayer could meet the operation requirements and evenly distribute,achieving the purpose of uniformly coating the canopy of different heights of fruit trees.
作者
宋雷洁
李建平
杨欣
王鹏飞
Song Leijie;Li Jianping;Yang Xin;Wang Pengfei(College of Mechanical and Electrical Engineering,Hebei Agricultural University,Baoding 071001,China)
出处
《中国农机化学报》
北大核心
2020年第8期34-39,共6页
Journal of Chinese Agricultural Mechanization
基金
国家重点研发计划(2016YFD0201100)
河北省现代农业产业技术体系水果创新团队(HBCT2018100205)。
关键词
喷雾机
塔型
导流结构
气流速度
sprayer
tower type
airflow speed
simulation calculation
