针-板电极正负电晕放电离子风的对比研究

为研究电晕放电离子风的特性，本文采用针-板放电装置，实验测量了不同放电条件下的电晕离子风速和风压，研究了电压极性、放电电压、电极间距、针尖曲率等因素对电晕离子风的影响.结果表明，离子风的速度随工作电压线性增大.在相同电极结构下，正电晕的起晕电压高于负电晕；正电晕离子风的风速大于负电晕离子风.此极性效应来源于正、负电晕风发展机制的差异. 

Comparison of Positive and Negative Ionic Wind in Needle-to-Plate Corona Discharge

The needle-to-plate configuration was employed in this paper to investigate the characteristics of ionic wind in corona discharge. The wind velocity and wind pressure were measured experimentally under different conditions including the voltage polarity, the applied voltage, the electrode spacing and the radius of needle tip and so on, to analyze the effect of these factors on ionic wind. The results show that the velocity increases linearly with the over-voltage. Under the same conditions the inception voltage of the positive corona is higher than the negative. The wind velocity of positive corona is higher than the negative at the same over-voltage and electrode spacing. And the polarity effect comes from the difference of developing mechanism between the positive and negative corona.