108 / 2021-06-09 09:19:23

Study on the mode transition of gliding arc discharge under low pressure

As a low-temperature plasma, the gliding arc has been widespread concerned in the field of gas conversion. Two discharge modes of gliding arc in CO₂ under low pressure is studied in this work. In the first discharge mode, the arc continuously performs a periodic motion of "ignition-elongation-extinguishment", while the second discharge mode is a glow discharge in which the arc is stagnant. Under different working conditions, the mode transition time between these two discharge modes is given. The experimental result shows that the mode transition time increases as the air pressure rises, and each electrode material has a corresponding critical pressure. The increase in the number of power-ups changes the surface condition of the electrodes, ultimately reducing the mode transition time. While the increase in the current level also reduces the mode transition time from another angle.