Diagnosis of Electron, Vibrational and Rotational Temperatures in an Ar/N2 Shock Plasma Jet Produced by a Low Pressure DC Cascade Arc Discharge
Diagnosis of Electron, Vibrational and Rotational Temperatures in an Ar/N2 Shock Plasma Jet Produced by a Low Pressure DC Cascade Arc Discharge
复制标题
DOI：
10.1088/1009-0630/15/9/08
复制
发表时间：
2013-09
影响因子：
1.7
通讯作者：
Li Cong;Zhang Jia-liang;Yao Zhi;W. Xingwei;Zhang Chenfei;Ding Hongbin
中科院分区：
文献类型：
--
作者：
Li Cong;Zhang Jia-liang;Yao Zhi;W. Xingwei;Zhang Chenfei;Ding Hongbin
本文用发射光谱法结合Abel反演分析，研究了直流级联电弧放电产生的具有明显多个交替区的低压Ar/N_2冲击等离子体射流。测量了膨胀区和压缩区的等离子体发射强度、电子温度、振动温度和转动温度。结果表明，在压缩区，电子温度、振动温度和转动温度的测量范围分别为1.1 ~ 1.6eV、0.2 ~ 0.7eV和0.19 ~ 0.22eV，并首次发现压缩区电子温度降低，振动温度和转动温度升高。由于非平衡等离子体效应，电子温度偏离振动和转动温度。在620 Pa左右的低压下，电子和重粒子在冲击等离子体射流中不能完全通过碰撞进行能量交换。
In this paper, a low pressure Ar/N2 shock plasma jet with clearly multicycle alternating zones produced by a DC cascade arc discharge has been investigated by an emission spectral method combined with Abel inversion analysis. Plasma emission intensity, electron, vibrational and rotational temperatures of the shock plasma have been measured in the expansion and compression zones. The results indicate that the ranges of the measured electron temperature, vibrational temperature and rotational temperature are 1.1 eV to 1.6 eV, 0.2 eV to 0.7 eV and 0.19 eV to 0.22 eV, respectively, and it is found for the first time that the vibrational and rotational temperatures increase while the electron temperature decreases in the compression zones. The electron temperature departs from the vibrational and the rotational temperatures due to non-equilibrium plasma effects. Electrons and heavy particles could not completely exchange energy via collisions in the shock plasma jet under the low pressure of 620 Pa or so.