多针电极喷雾刀梁静电场特性与雾化效果研究  

Electrostatic Field and Atomization Effect of Multiple Needle Electrodes Spraying Blade

作　　者：高全杰 夏志勇[1] 汪朝晖[1] 王维[1] 秦拓[1] 黄浩[1] 

机构地区：[1]武汉科技大学机械自动化学院,武汉430081

出　　处：《农业机械学报》2014年第4期110-116,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：中国博士后科学基金资助项目(2011M501250);高等学校博士学科点专项科研基金资助项目(20124219120001);湖北省教育厅科学技术研究计划优秀中青年人才资助项目(Q20111108)

摘　　要：建立了多针电极喷雾刀梁静电场求解模型,采用Ansoft Maxwell软件分析了多针电极喷雾刀梁空间中电压及电场强度的分布规律,并研究了针电极间距对静电场的影响,通过激光粒度分析仪测量分析了不同针电极间距的刀梁雾化粒径分布规律。结果表明:针电极可将该刀梁附近的最高电场强度提高到2.7×106V/m,针电极附近的电场变化幅度最大,针电极最佳间距为2 mm时多针电极下端可形成分布均匀的高场强区域,此时该刀梁静电喷雾的雾化粒径减小到42μm,且粒径分布均匀,该实验结果与计算结果吻合。A model to solve the electrostatic field of multiple needle electrodes spraying blade was established.The distribution regularities of electric potential and electric intensity in the space out of multiple needle electrodes spraying blade were analyzed by Ansoft Maxwell software,and the influence of different gap of needle electrodes on electrostatic field was researched.Meanwhile,the particle sizes of the droplets atomized by the spraying blade with different gap needle electrodes were measured by laser particle size analyzer and the distribution law of the droplets was analyzed by computer.The results indicated that the highest electric intensity near the needles could be promoted to 2.7 × 106V/m by the multiple needle electrodes,and the amplitude variation of electric field near the needle electrodes was the maximum.A region with high electric intensity uniform distributed could be formed when the gaps of needle electrodes were 2 mm which was the optimal gap,and the particle size of droplets atomized by the spraying blade decreased to 42 μm.Furthermore,the distribution of particle size was more uniform,and the results of experimental were consistent with the characteristics of electrostatic field obtained by evaluation.

关 键 词：静电雾化 刀梁 针电极 有限元法 粒径分布 

分 类 号：S491[农业科学—植物保护]