中国物理B ›› 2016, Vol. 25 ›› Issue (10): 105205-105205.doi: 10.1088/1674-1056/25/10/105205
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
Mu-Yang Qian(钱沐杨), San-Qiu Liu(刘三秋), Xue-Kai Pei(裴学凯), Xin-Pei Lu(卢新培), Jia-Liang Zhang(张家良), De-Zhen Wang(王德真)
Mu-Yang Qian(钱沐杨)1, San-Qiu Liu(刘三秋)1, Xue-Kai Pei(裴学凯)2, Xin-Pei Lu(卢新培)2, Jia-Liang Zhang(张家良)3, De-Zhen Wang(王德真)3
摘要:
In this paper, a pulsed-dc CH3OH/Ar plasma jet generated at atmospheric pressure is studied by laser-induced fluorescence (LIF) and optical emission spectroscopy (OES). A gas-liquid bubbler system is proposed to introduce the methanol vapor into the argon gas, and the CH3OH/Ar volume ratio is kept constant at about 0.1%. Discharge occurs in a 6-mm needle-to-ring gap in an atmospheric-pressure CH3OH/Ar mixture. The space-resolved distributions of OH LIF inside and outside the nozzle exhibit distinctly different behaviors. And, different production mechanisms of OH radicals in the needle-to-ring discharge gap and afterglow of plasma jet are discussed. Besides, the optical emission lines of carbonaceous species, such as CH, CN, and C2 radicals, are identified in the CH3OH/Ar plasma jet. Finally, the influences of operating parameters (applied voltage magnitude, pulse frequency, pulsewidth) on the OH radical density are also presented and analyzed.
中图分类号: (Plasma sources)