为了减小甚至消除多管集成静电雾化(multiplexed electrostatic atomization,MES)中相邻毛细管荷电射流间电场的相互作用,探索和优化MES雾化特性,通过设计错位毛细管阵列来扩大喷雾源间距,并在静电场中加介质来减小射流排斥作用,改善了电场均匀性。对不同介质作用下MES的雾化特性进行了试验研究,结果表明:介质作用下MES较无介质作用下全锥射流的雾化锥角增大,产生锥射流所需的电压及形成的电流增大,液滴粒径均匀性变差,液滴空间分布变均匀;且介质绝缘性越好,雾滴粒径越小,粒径分布越均匀;介质导电性越强,粒径均匀性越差,MES稳定性越好。所以通过扩大喷雾源间距和在静电场中插入介质能有效地改善喷雾源射流周围电场的均匀性,优化MES雾化特性。
In order to reduce or even eliminate the electric field interaction of the charged jet between the adjacent capillaries in multiplexed electrostatic atomization (MES), the characteristics of MES was explored and the atomization was optimized, the nozzle distance was expanded by designing the MES device with a dislocation array, the jet rejection was reduced and the electric filed uniformity was changed by inserting a media in the electrostatic field. Experimental investigation was performed for multiplexed electrostatic atomization characteristics. Experiments show that the whole spray cone of the MES full cone-jet under the role of medium angle compared with no medium increases; the voltage required to produce the jet cone and the formed current increased; the uniformity of droplet size got worse but the spatial distribution of droplets became more uniform; the better the medium insulation was, the finer droplet size was, the more uniform the particle size was ;the stronger the medium conductivity was, the more stable of the capillary MES but the uniformity of droplet size was inverse; The electric filed around the spraying nozzle would be effectively improved and the atomization characteristics would be optimized through expanding the nozzle distance and adding a media in the electrostatic field.