静电喷雾电晕充电特性研究

针对在电晕充电试验过程中出现的瞬时不稳定而引起的突变现象，进行理论分析，用简洁的电学模型描述电晕充电过程，探讨了电晕充电的伏安特性突变的机理。分析表明：突变现象是感应充电进入电晕充电的固有特性．电压降低，电流突然增大．产生突变，且不稳定的起始（着火）电压与电极的结构形式、尺寸、液体介电物理性质有关。理论和试验表明电晕充电中雾滴的荷电量与充电电压间存在着线性关系。

Mechanism of Corona Charge on Electrostatic Spray

Making an theoretical analysis of the sudden change arising from the momentary instability in the process of corona charge and discussing the mechanism of the sudden change in the voltage-ampere property of corona charge, describing the process with easy-to-understand electrical mold and proving, through the analysis, that the sudden change is itself a natural property of corona charge in that the current increases suddenly when the voltage decreases, thus causing the sudden change. It is found that the instable start (ignition) voltage is related to the structure and the size of electrode as well as to the physical property of liquid electric inductivity. The findings both theoretically and experimentally reveal that there exists a linear relation between the droplet charging amount in the corona-charging processes and the charging voltage.