Temporally and spectrally resolved observation of crossed-flow DBD plasma jet using pure helium and argon/acetone mixed gases
Temporally and spectrally resolved observation of crossed-flow DBD plasma jet using pure helium and argon/acetone mixed gases
复制标题
使用纯氦和氩/丙酮混合气体对错流 DBD 等离子体射流进行时间和光谱分辨观察
DOI：
10.1088/0963-0252/21/3/034004
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发表时间：
2012
影响因子：
3.8
通讯作者：
B. N. Ganguly and O. Sakai
中科院分区：
文献类型：
--
作者：
K. Urabe;B. L. Sands;B. N. Ganguly and O. Sakai
本文主要用增强型电荷耦合器件(ICCD)相机研究了垂直纯氦和倾斜的Ar/丙酮混合气体的交叉气流介质阻挡放电等离子体射流。随着外加电压脉冲的升高，我们观察到了电离前沿的传播和瞬时辉光放电的形成。在外加电压脉冲的下降斜率期间，点燃了具有相反极性的二次放电。为了分析放电中激发态物种的分布，在ICCD相机前放置了光学干涉滤光片，中心波长设置在激发态物种的跃迁。成像结果显示了两股气流交叉点附近详细的放电结构，包括随时间改变位置的两股气流之间的桥接发射。我们还讨论了二次放电的点火机制，考虑了一次放电过程中积累电荷的影响和一次放电后沟道电导率的变化。
A crossed gas flow dielectric barrier discharge plasma jet using vertical pure helium and tilted argon/acetone mixed gases is investigated in this study, mainly by an intensified charge-coupled device (ICCD) camera. We have observed ionization-front propagation and transient glow discharge formation following the rise of the applied voltage pulse. A secondary discharge with a reverse polarity was ignited during the falling slope of the applied voltage pulse. In order to analyze excited-species distribution inside the discharge, optical interference filters were placed in front of the ICCD camera with the center wavelengths set at the excited species' transition. The imaging results revealed detailed discharge structures around the crossing point of the two gas flows including bridging emission between the two flows that changed position with time. We also discuss the ignition mechanisms of the secondary discharge considering effects of accumulated charge during the primary discharge and changes in the channel conductivity following the primary discharge.