Effect of Humidity on Negative Streamer Discharge in Short Air Gap
摘要
Humidity affects the microscopic process of negative streamer discharge in air gap. Considering the influence of humidity on ionization, attachment and recombination in the discharge process, a fluid model of negative streamer discharge in rod-plane air gap is established. The initiation, development and breakdown process of negative streamer discharge in air gap are simulated under the conditions of relative air humidity of 0, 30, 60 and 90%. In this study, humidity promotes negative streamer discharge. It is found that humidity promotes negative streamer discharge, and humidity is positively correlated with the average development speed of negative streamer discharge, the electric field intensity of streamer head and the peak value of electron concentration.