70 / 2024-04-10 09:51:59

Microscopic Behavior of Air-gap Discharge in Direct-current Electric Field of Rod-plate Electrode under Atmospheric Pressure

Air-gap discharge, Charged particles, Flux-corrected transport algorithm (FCTA), Discharge spectrum

The research and development of green dielectric is the forefront of the field of environmental protection at present, and air has attracted wide attention because of its special physical properties, cheap and abundant resources and unique electrical properties. In this paper, a non-uniform electric field numerical analysis and experimental model of 5mm rod plate air-gap is made up, the behavior equations of charged particles during the discharge process of this model are established by using the fluid mechanics method, and the flux correction transport algorithm (for short FCTA) is adopted to analyze the behavior characteristics of charged particles during the discharge process of air-gap in detail. More importantly, the complete process of air gap discharge is revealed through rigorous numerical simulation, and the behavior characteristics of air gap discharge trigger, electron avalanche generation, flow band formation, discharge trajectory evolution and charged particle distribution are found, and furthermore, the spectral information generated by the physicochemical reaction of charged particles in the air gap discharge channel was collected experimentally. Thus, different types of charged particles and their behavior characteristics in the discharge process are defined. The results show that the theoretical analysis method used in this paper is effective, the model design and the experimental circuit layout are reasonable, the two are not only complementary, but also the conclusion is consistent. The research results of this paper not only provide theoretical and experimental means for further study of air discharge phenomenon, but also provide technical reference for developing green dielectric to broaden the application field of air.