摘要
为探索纸质被动式农药微混合器的主要参数对农药混合效果的影响规律和增强农药混合的机理,选取Y型、Z型和方波型3种结构的纸质被动式农药微混合器,试验研究了每种微混合器不同参数条件对混合性能的影响,选出最优参数,再将最优参数下的3种微混合器的混合性能进行对比。试验结果表明,Y型微混合器的最优参数为:入口速度0.010 m L/min、入口角30°,Z型微混合器的最优参数为:入口速度0.010 m L/min、峰间距3 mm、转角30°,方波型微混合器的最优参数为:入口速度0.010 m L/min、波高2 mm、波宽5 mm;在各自的最优参数条件下,Y型微混合器出口处混合强度为0.622 7,Z型微混合器出口处混合强度为0.690 2,方波型微混合器出口处混合强度为0.732 6,方波型微混合器混合性能最好;纸质被动式农药微混合器通道内部存在纸纤维,可以提供流体流动的动力,也可以加剧分子间的扩散作用,同时也在一定程度上限制了对流作用。
In order to discover the influence rules of paper-based passive micro-mixer＇s parameters on mixing effect of pesticides,the Y-shaped micro-mixer,Z-shaped micro-mixer,square-wave micro-mixer were selected and the relationships among the parameters of each kind micro-mixer and mixing performance by experiments were researched. Then optimal parameters of each kind micro-mixer were chosen,and mixing performances of three micro-mixers were contrasted under the optimal parameters.The results of experiments show that Y-shaped micro-mixer ＇s optimal parameters are inlet velocity of0. 010 m L / min,inlet angle of 30°,Z-shaped micro-mixer ＇s optimal parameters are inlet velocity of0. 010 m L / min,peak separation of 3 mm,corner angle of 30°,square-wave micro-mixer ＇s optimal parameters are inlet velocity of 0. 010 m L / min,wave height of 2 mm,wave width of 5 mm,and under their optimal parameters,Y-shaped micro-mixer＇s outlet mixing intensity is 0. 622 7,Z-shaped micromixer＇s outlet mixing intensity is 0. 690 2,square-wave micro-mixer＇s outlet mixing intensity is 0. 732 6.The square-wave micro-mixer has the best mixing performance. Paper-based passive micro-mixer has some fibers in its channel,it can provide dynamic of flowing and enhance the diffusion of liquid pesticides. On the other hand,it can limit the convection to a certain degree. This article researched the mixing performance of paper-based passive micro-mixer for the first time internationally.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2016年第7期73-79,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
'十二五'国家科技支撑计划项目(2014BAD08B03)
国家自然科学基金重点项目(61233006)
江苏省农业科技自主创新资金项目(CXC1571033-02)
江苏省高校优势学科建设工程项目(苏财教(2014)37号)
关键词
纸质被动式微混合器
农药
混合性能
试验
paper-based passive micro-mixer
pesticide
mixing performance
experiment
