The corona discharges provide an efficient way to induce precipitation or eliminate fog by increasing ion density in the open air. In this paper, one bipolar corona discharge array (positive and negative high voltage coupled simultaneously) which can generate high densities of positive and negative ions is developed. The comparison between bipolar corona discharge array and unipolar corona discharge array (positive or negative coupled only) indicates that bipolar corona discharge array can generate ∼3 times higher ion density than unipolar corona discharge array. More charged aerosols are produced through collisions between ions and aerosols. The collision rate between aerosols is increased substantially by the attractive forces between positively and negatively charged aerosols. The deposition of aerosols induced by bipolar discharges is 25.7% higher than that of unipolar discharges at the humidity super-saturation condition. Therefore, the bipolar corona discharge system is a new option for the large scale ion sources used for artificial weather modification.

电晕放电提供了一种通过增加露天离子密度来诱导降水或消除雾的有效方法。本文研制了一种可产生高密度正负离子的双极电晕放电阵列（正负高压同时耦合）。双极电晕放电阵列与单极电晕放电阵列（仅正耦合或负耦合）之间的比较表明，双极电晕放电阵列可以产生比单极电晕放电阵列高约 3 倍的离子密度。通过离子和气溶胶之间的碰撞产生更多带电的气溶胶。带正电和带负电的气溶胶之间的吸引力大大增加了气溶胶之间的碰撞率。双极放电引起的气溶胶沉积为 25。在湿度过饱和条件下，比单极放电高 7%。因此，双极电晕放电系统是用于人工影响天气的大规模离子源的新选择。