电极位置影响荷电量的试验研究

Experimental Study on Effect of Electrode Position on Charged Volume

为研究在感应荷电状态下环形针状电极安装位置对雾滴荷电性能影响,进行了相同的喷雾压力和液体介质的条件下,3种不同流量喷头的全因素射流荷电喷雾试验。试验采用环径50 mm的电极,等距离选取5种安装位置,用网状目标法测量群体雾滴电流,用荷质比评价感应荷电性能,此后详细分析了荷电电压、电极安装位置及喷头流量等因素对荷电量的影响。试验结果表明:荷电量与荷电电压成正比并随电极的安装位置前移而增大;荷电量与安装位置间存在线性关系;喷头流量对荷质比的影响较大。最后根据试验结果提出了荷电量计算公式和相应系数的计算方法,其计算误差<5%,可用于荷电量计算和预测,为荷电效果的定量分析奠定基础。

To study the effect of the installation position of the circular needle electrode on the performance of charged droplets in the state of induction charge, the effect of charged voltage, installation position of electrode and nozzle flow on charge volume were analyzed in detail through test, in which electrode with the circular diameter of 50mm was used and 5 positions were selected for all-factor stream charged spray with three nozzles, different in flow, in the condition of identical spray pressure and liquid medium. In the test, the group droplet current was measured by mesh target and the induction charge performance was evaluated by charge-mass ratio. The results show that the charge volume is proportional to the charged voltage and will increase with the forwarding of the electrode position while the charge volume is linear to the installation position and the nozzle flow exerts greater effects on the charge-mass ratio. By further analysis of the results, the computational formula of the charge volume with the method of computing the related coefficients was put forward, the precision rate running to 0.95 was confirmed, it can be used in the computation and the prediction of the charge flow, and lays the foundation for the quantitative study of the charging result.