Generation of atmospheric pressure air diffuse discharge plasma in oxygen enriched working gas with floating electrode  

作　　者：张敏 刘云虎 李瑶 李淑琪 袁皓 梁建平 周雄峰 杨德正 Min ZHANG;Yunhu LIU;Yao LI;Shuqi LI;Hao YUAN;Jianping LIANG;Xiongfeng ZHOU;Dezheng YANG(School of Sciences,Shihezi University,Shihezi 832003,People’s Republic of China;Key Laboratory of Materials Modification by Laser,Ion and Electron Beams,Dalian University of Technology,Ministry of Education,Dalian 116024,People’s Republic of China;Key Laboratory of Environmental Monitoring and Pollutant Control of Xinjiang Bingtuan,Shihezi University,Shihezi 832003,People’s Republic of China)

机构地区：[1]School of Sciences,Shihezi University,Shihezi 832003,People’s Republic of China [2]Key Laboratory of Materials Modification by Laser,Ion and Electron Beams,Dalian University of Technology,Ministry of Education,Dalian 116024,People’s Republic of China [3]Key Laboratory of Environmental Monitoring and Pollutant Control of Xinjiang Bingtuan,Shihezi University,Shihezi 832003,People’s Republic of China

出　　处：《Plasma Science and Technology》2023年第4期111-119,共9页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundations of China(Nos.11965018,51977023 and 52077026);the Science and Technology Development Fund of Xinjiang Production and Construction of China(No.2019BC009);the Fundamental Research Funds for the Central Universities of China(No.DUT21LK31);the Key Laboratory Fund of National Defense Science and Technology of China(No.6142605200303);Science and Technology Plan Project of the Ninth Division of the Crops of China(No.2021JS003)。

摘　　要：In this work,a floating electrode is employed to generate a stable large-area diffuse discharge plasma under an open oxygen-rich environment.The discharge image and the optical emission spectra of the N2(C-B),N2+(B-X),N2(B-A),and O(3p–3s,777 nm)are measured to analyze the morphological and optical characteristics of the discharge.The effects of applied voltage,gas flow rate,and electrode gap on the reactive species,vibrational temperature and rotational temperature are investigated,and the discharge mode is discussed by simulating the electrostatic field before the breakdown.It is found that the changes of applied voltage and electrode gap causes the transition of the discharge modes among corona mode,diffuse discharge mode and spark mode.It is shown that the floating electrode can inhibit the transition from discharge to spark mode to a certain extent,which is conducive to maintaining the stability of discharge.As is vividly illustrated in this study,the increase of applied voltage or the decrease of electrode gap contributes to the generation of more active particles,such as N2(C)andN+2(B).Furthermore,the Joule heating effect becomes more evident with the increased applied voltage when the electrode gap is 15 and 20 mm.Moreover,as the applied voltage increases,the vibrational temperature increases at the electrode gap of 25 mm.

关 键 词：floating electrode optical emission spectra vibrational temperature rotational temperature 

分 类 号：O53[理学—等离子体物理]