Electrical and optical diagnostics of atmospheric pressure argon gliding arc plasma jet

摘要

This work is devoted to the experimental investigation of an atmospheric pressure argon plasma jet generated by a gliding arc reactor. The dynamic behaviour of the argon gliding arc plasma jet is investigated by the oscillations of the electrical signals, while the time-resolved arc motion behaviour on the electrode wall is analyzed by high-speed photography. Two different arc breakdown regimes are identified: initial breakdown in the narrowest electrode gap and restrike breakdown on the electrode surface. It is also found that the anode and cathode arc roots exhibit different motion behaviour. Moreover, emission spectroscopic technique has been employed to determine the axial distribution of the gas temperature and electron density in the argon plasma jet.