Electric wind characterisation in negative point-to-plane corona discharges in air

In point-to-plane corona discharges in air, the collisions of charged particles with neutral particles induce a gas movement between the point to the plane called electric wind. A one-dimensional model of the neutral particle velocity along the discharge axis and between the electrodes is first developed. Laser Doppler Anemometry is used to measure the axial velocity pro. le of the gas between the electrodes. Discrepancies between experimental results and predictions of the on-axis velocity are discussed. Finally, the measured velocity profile compares quite well with a cos(5) theta distribution. Significant differences between measured and cos(5) theta profiles are observed near the discharge axis which could be attributed to the presence of seeding particles.