Measurement of Hydroxyl Radicals in Air Negative Pulse Discharge with Nozzle-Cylinder Electrode

Abstract

Hydroxyl radicals were measured by optical emission spectroscopy in air negative pulse discharge. The nozzle high voltage electrode is put in the middle of the cylinder steel reactor grounded. The electrical characteristics of reactor were measured. The effects of the pulse repetition rate, the humidity of the air and the flow rate of the air on the hydroxyl radicals' yield were studied. Results show that higher pulse repetition rate and lower flow rate of the air are helpful to the yield of the hydroxyl radicals. The change of the relative intensity of hydroxyl radicals' optical emission spectroscopy isn't linear with the humidity of the air in the reactor. Keywords-optical emission spectroscopy; negative pulse discharge; hydroxyl radicals; nozzle-cylinder electrode; airI.