Abstract: The characteristics of single needle-to-plane corona-dielectric barrier discharge (needle-to-plate CDBD) with glass fiber as packing dielectric were investigated. Discharge voltage and current waveforms were measured and the discharge power was calculated. The discharge currents with and without glass fiber filled between electrodes were compared, and the relationships between discharge power and gas gap distance, capacitive current, discharge voltage were analyzed. The influence of glass fiber as packing dielectric on the characteristics of single needle-to-plane corona-dielectric barrier discharge were studied experimentally. Comparing the corona-dielectric discharges observed in air and in a medium filled with glass fiber as packing dielectric, it was found that: ① the latter has less onset discharge voltage and greater discharge power; ② continuous discharge current of the latter decreases obviously while discharge pulse number and their current amplitude increase significantly; ③ unlike the more continuous currents in the former, there is more pulse discharge during negative voltage on the needle electrode in the latter.

Key words: corona-dielectric barrier discharge, single needle-to-plane electrode, packing dielectric, discharge current