大气压氩等离子体射流特性  

Characteristics of the Atmospheric Pressure Argon Plasma Jet

作　　者：杨安[1,2,3] 聂秋月[2] 王志斌[2] 李和平[2] 张西正[3] 包成玉[2] 

机构地区：[1]南方医科大学生物医学工程学院,广州510515 [2]清华大学工程物理系,北京100084 [3]军事医学科学院卫生装备研究所,天津300161

出　　处：《高电压技术》2012年第7期1763-1769,共7页High Voltage Engineering

基　　金：国家自然科学基金(10972119);中国博士后科学基金(20110490418)~~

摘　　要：为了在大气压下获得均匀、稳定且具有较大体积的氩气介质阻挡放电等离子体射流,提出了一种新的同轴型具有螺纹型内电极结构的等离子体发生器结构设计,在大气压开放环境下获得了均匀稳定的类辉光氩气介质阻挡放电等离子体射流。实验和初步的零维数值模拟结果表明:在所研究的工作参数范围内,放电随外加电压的增加可工作于初始放电阶段、过渡阶段、稳定放电和不稳定放电阶段;在稳定放电模式下,均匀弥散的类辉光放电可充满内径为8.9mm的玻璃管,发射光谱测量结果表明在等离子体射流区含有多种化学活性粒子;数值计算和实验测量所估算的等离子体射流长度基本一致(可为30mm以上),且等离子体射流发射光谱强度的轴向分布与其中亚稳态粒子的退激发过程相关。Abstract： In order to produce uniform, steady and large volume dielectric barrier discharge （DBD） argon plasma jets at atmospheric pressure, a plasma generator with a screw-like inner electrode configuration was proposed. A uni- form, steady and visibly glow-like discharge plasma jet was obtained at an open environment using this newly-de- signed plasma generator. The experimental and preliminary zero- dimensional modeling results show that, the dis- charges can be operated at an initial, transitional, stable or unstable discharge modes with the increase of the applied voltage; the glow-like discharge can occupy the whole glass tube with an inner-diameter of 8.9 mm at a stable dis- charge mode; the optical emission spectrum shows that there are different kinds of chemically reactive species in the plasma jet region; the estimated length of the plasma jet （longer than 30 mml based on the modeling and experi- ments are consistent with each other qualitatively. The axial profile of the emission intensity of the plasma jet is re- lated with the de-excitation process of the metastables in the plasma jet region.

关 键 词：大气压等离子体 介质阻挡放电 氩等离子体射流 螺纹型电极结构 电特性 光谱特性 

分 类 号：O53[理学—等离子体物理]