Optimization of charge neutralization based on computer simulation

在二维电流体模型的基础上，研究了几种类型的电离剂的电荷中和现象。所得结果可以解释实际问题是如何发生的。研究发现，由于正负离子密度的不平衡，任何时空电荷都会在被中和的物体上产生偏置电压。对于最佳的中和，在所有区域的准中和分布是非常重要的；因此，具有准中和电荷密度的离子源的电离器是必要的。此外，还提出了一种改进的获得交流电离器和脉冲直流电离器零偏置电压的方法。

Phenomena of charge neutralization with several types of ionizers were investigated on the basis of a 2D-electrohydrodynamic modeling. The results obtained could explain how practical troubles occur. It was found that any spatiotemporal charge due to unbalance in positive and negative ion densities yields an offset voltage on an object to be neutralized. For optimum neutralization, quasi-neutralized distribution in all regions is of great importance ; therefore, ionizers with an ion source having quasi-neutralized charge densities are necessary. In addition, a modified method to get zero offset voltage for AC and pulse-DC ionizers was proposed.