等离子体荷电喷雾的雾化机理与效果分析

阐述了环形电极电场中液滴的荷电雾化过程及破碎机理,并通过改变电压、极距、电极针数和电极直径等参数进行荷电雾化试验研究,揭示液滴荷电及雾化特性与诸影响参量的关系。结果表明,雾滴数量中径随着电极针数的增加、极距的增大、电极直径的减小而减小。当未加荷电电压时,雾滴扩散比RD为0.662,雾滴粒径较大、粒谱较宽;当荷电电压增大到20kV时,雾化液滴的数量分布曲线与体积分布曲线基本接近,雾滴粒径变小、粒谱变窄,雾滴扩散比达到0.813,雾滴分布均匀度明显提高。

Research on Atomization Mechanism and Effect of Charged Spraying with the Plasma

The charging experiments were performed with different voltages, different distances between the electrode ring center and the spraying nozzle, different electrode curvature radius and different electrode numbers, so the relationship between the charging and atomizing characteristics of droplets and those influencing factors was discovered. The results demonstrated that the droplets number median diameter decreased with the increase of the electrode voltage and distance between the electrode ring center and the spraying nozzle, and with the smaller of electrode curvature radius. The droplets diffusing ratio decreased with the increase of the voltage. The RD Of uncharged droplet is 0. 662, and the droplets diameter and diameter distribution are rather big. When the voltage increased to 20 kV, the RD value decreased to 0. 813, the droplets number distribution curve and the droplets volume distribution curve were almost similar, and the droplets diameter and diameter distribution were smaller, the distribution uniformity of droplets was much better.