果园风送喷雾机蝶型导流结构设计仿真与试验  

Design and simulation and simulation experimental analysis of a butterfly type diversion structure for orchard air blast sprayer

作　　者：刘玉肖 杨欣[1] 边永亮 李昕昊 李建平[1] 王鹏飞[1] LIU Yuxiao;YANG Xin;BIAN Yongliang;LI Xinhao;LI Jianping;WANG Pengfei(College of mechanical and electrical engineering,Hebei Agricultural University,Baoding 071001,China)

机构地区：[1]河北农业大学机电工程学院,河北保定071001

出　　处：《河北农业大学学报》2023年第2期103-109,共7页Journal of Hebei Agricultural University

基　　金：国家苹果产业技术体系建设专项资金资助(CARS-27);河北省现代农业产业技术体系水果产业创新团队果园装备专项(HBCT2018100205);河北省属高等学校基本科研业务费研究项目(KY2021015)。

摘　　要：针对传统风送喷雾机风道气流分布不均匀的问题,设计1种蝶型导流结构,对不同进风口直径、风道倾斜角度、涡轮转速等结构参数,利用Flow simulation软件对导流结构内部气流场进行模拟仿真,监测6个出风口风速,并计算其速度均值和标准差,并通过正交实验法,以均值和标准差为优化响应值,得出最优配置参数为进风口直径535 mm、风道倾斜角度90°、风机转速190 rad/s。对调整风道参数后的导流结构内部气流场模拟仿真,分析其速度云图和相对压力云图,6个出风口风速分别为20.394、22.232、25.799、20.159、22.446、23.732 m/s,风速均值为22.627 m/s,标准差为1.93,风速分布较均匀,压力分布均匀。通过试验验证,出风口风速真实值与模拟值误差不超过5%,叶面叶背雾滴沉积密度在20滴/cm2以上,变异系数不超过10%,雾滴分布均匀,蝶型导流结构设计符合要求。Focusing on the uneven distribution of air in traditional wind driven sprayer,a butterfly type diversion structure was designed.The air flow field of the diversion structure was simulated by Flow Simulation software with different air inlet diameter,air duct inclination angle,turbine speed and other structural parameters.The wind speed of the 6 outlets was monitored,and the mean value and standard deviation were calculated as the optimal response values.The optimal configuration parameters were determined by orthogonal experiment,including inlet diameter as 535 mm,air duct inclination angle as 90°and fan speed as 190 rad/s.Then the flow simulation software was used to simulate the internal air flow field of the diversion structure,and the velocity cloud diagram and relative pressure cloud diagram were analyzed.The wind speeds of the six outlets were 20.394,22.232,25.799,20.159,22.446 and 23.732 m/s,respectively.The average wind speed was 22.627 m/s and the standard deviation was 1.93.The wind speed distribution and the pressure distribution were uniform.Through experimental verification,the error between the real value of air velocity at the air outlet and the simulated value was lower than 5%.The deposition density of droplets on the blade surface and back was 20 drops/cm2.The coefficient of variation was less than 10%.And the droplet distribution was uniform.The results suggested that the design meets the requirements.

关 键 词：风送喷雾机 流体仿真 气流速度 导流结构 

分 类 号：S491[农业科学—植物保护]