风幕式气力辅助静电喷雾沉积特性  

Deposition and Distribution Characteristics of Air-assisted Electrostatic Spraying by Wind-curtain

作　　者：王军锋[1] 张娟娟[1] 王贞涛[1] 霍元平[1] 王泽[1] 

机构地区：[1]江苏大学能源与动力工程学院,镇江212013

出　　处：《农业机械学报》2012年第2期61-65,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家高技术研究发展计划(863计划)资助项目(2008AA100905)

摘　　要：针对传统农业施药过程中雾滴漂移量大和雾滴冠层穿透力不足的问题,以风幕式气力辅助喷雾系统为研究对象,采用称重平面沉积量方法,研究了风幕式气力辅助下荷电喷雾和非荷电喷雾在不同高度面上的沉积规律,以及不同风幕风速影响下荷电喷雾和非荷电喷雾的沉积特性,分析了风幕射流流场对喷雾液滴沉积分布的影响。研究表明:风幕式气力辅助有效减少了液滴的横向扩散,使喷雾沉积集中在靠近喷雾中心的狭窄区域,有效抑制雾滴漂移;风幕流场加强喷雾流场的扰动,使非荷电喷雾和荷电喷雾沿喷杆轴向沉积都更加均匀。气体射流增加了液滴的动量,射流速度越大风幕对喷雾沉积分布影响越大。Due to spray drift and less penetration into the crop canopy by conventional pesticide application methods,a wind-curtain air-assisted spraying system under a no-canopy condition was evaluated by using electronic scale to weigh deposition on the plane.Overall deposition and distribution of electrostatic spray and un-electrostatic spray on different heights with different wind velocities was investigated.Effects of the field of wind-curtain on deposition and distribution of spraying was analyzed.Results showed that the wind-curtain decreased transversal diffusion of spray drop which centralize spray deposition in narrow region near the centre and repress spray drift.The air flow enhance disturbance of spray field which enhanced uniformity of deposition of electrostatic spray and un-electrostatic spray along the axial direction of the boom.The air jet increased momentum of small droplets far away the nozzle and the greater air curtain velocity the greater impact on distribution of spraying.

关 键 词：风幕 气力辅助 雾滴漂移 静电雾化 液滴沉积分布 

分 类 号：S03[农业科学] S499