This paper is aimed at studying charge neutralization of flowing particles using a DC corona discharge. The efficiency of two electrodes configurations, namely cone-grid and coaxial cylinder, was experimentally studied. The influence of electrode placement in the middle or at the end of a lab-scale canalization installation is highlighted. Surface potential distribution and charge measurements showed that both configurations can lead to excellent neutralization rates, of around 99%, depending on electrode voltage and placement. The performances of the cone-grid configuration were found to vary according to the electrode placement. Conversely, the coaxial configuration is more stable and, practically, placement independent. A theoretical calculation of required corona discharge to perfectly neutralize charges is also presented. The obtained formula was experimentally verified showing a good agreement between calculation and measurement. Furthermore, the influence of charged particles on the corona discharge when crossing the coaxial electrode is highlighted through discharge current measurement and electric field calculation using finite element software. The charged particles were found to alter the electric field distribution and discharge current resulting in the electric field increase near the wire and his decrease near the grounded cylinder. Therefore, the charged particles act as a dielectric barrier that can affect the discharge current.

本文旨在研究使用直流电晕放电中和的流动粒子的电荷。实验研究了两种电极配置的效率，即锥形网格和同轴圆柱体。突出显示了电极放置在实验室规模的渠化设备中间或末端的影响。表面电势分布和电荷测量结果表明，两种配置均可导致极好的中和率，取决于电极电压和位置，其中和率约为99％。发现锥栅构造的性能根据电极放置而变化。相反，同轴配置更稳定，并且实际上独立于放置。还提出了理想的电晕放电以完全中和电荷的理论计算。通过实验验证了所获得的公式，显示出计算和测量之间的良好一致性。此外，通过使用有限元软件进行的放电电流测量和电场计算，可以突出带电粒子穿过同轴电极时对电晕放电的影响。发现带电粒子会改变电场分布和放电电流，导致导线附近的电场增加，而接地圆柱附近的电场则减小。因此，带电粒子充当可影响放电电流的介电屏障。通过使用有限元软件进行的放电电流测量和电场计算，可以突出带电粒子对穿过同轴电极时电晕放电的影响。发现带电粒子会改变电场分布和放电电流，导致导线附近的电场增加，而接地圆柱附近的电场则减小。因此，带电粒子充当可影响放电电流的介电屏障。通过放电电流测量和使用有限元软件计算的电场，可以突出带电粒子对穿过同轴电极时电晕放电的影响。发现带电粒子会改变电场分布和放电电流，导致导线附近的电场增加，而接地圆柱附近的电场则减小。因此，带电粒子充当可影响放电电流的介电屏障。