风送式果园喷雾机气流场优化及试验  

Optimization design and test of airflow field for orchard air-blast sprayer

作　　者：张俊雄[1] 朱祥森 刘景云[1] 高金 张凯飞 ZHANG Junxiong;ZHU Xiangsen;LIU Jingyun;GAO Jin;ZHANG Kaifei(College of Engineering,China Agricultural University,Beijing 100083,China)

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《江苏大学学报（自然科学版）》2021年第4期406-413,共8页Journal of Jiangsu University：Natural Science Edition

基　　金：国家重点研发计划项目(2016YFD0200700);天津市科技计划项目(17YFCZZC00330)。

摘　　要：针对采用轴流风机的风送式果园喷雾机气流场分布难以和果树冠层区域喷雾要求相吻合的问题,提出一种风机气流场优化方法.通过在风机内部的中导流板、后导流板及出风口处添加并优化导风板的方法来提高气流场与果树冠层喷雾要求的匹配效果,以提升喷雾质量.通过SolidWorks、PolyWorks和Geomagic Studio共同建立风机三维模型,采用κ-ε湍流模型并利用Fluent软件进行气流场仿真分析,最后试制样机并进行实际气流速度的测量和对比.结果表明:通过优化导流装置后,喷雾机左、右侧气流速度在果树冠层最稠密的100~190 cm高度范围内平均气流速度分别提升29.1%和32.5%,有助于提升气流对果树冠层的穿透能力,提高喷雾效果.To solve the problem that the airflow field distribution of the orchard air-blast sprayer with axial flow fan was difficult to match the spray requirement of the canopy area of fruit tree,a method was proposed for optimizing the airflow field of the fan.By adding and optimizing air deflectors inside the blower on the middle and rear airflow guide plate and the outlet of blower,the matching effect between the airflow field and the spray requirement of the canopy of fruit tree was enhanced to improve the spray quality.Applying SolidWorks,PolyWorks and Geomagic Studio,the three-dimensional model of blower was established.Based on theκ-εturbulence model,the Fluent software was used to simulate the airflow field.The prototype was produced,and the actual airflow velocity was measured and compared.The results show that by optimizing the diversion device,the average airflow speeds on the left and right side of the sprayer are respectively increased by 29.1%and 32.5%in the height range from 100 to 190 cm of fruit tree canopy.The penetration ability of the airflow to the fruit tree canopy can be enhanced to improve the spray effect.

关 键 词：风送式喷雾机 气流场 导流板 优化设计 仿真 

分 类 号：S491[农业科学—植物保护]