High-Speed Imaging of High-Frequency Effects of a CO2 Plasma Flow
High-Speed Imaging of High-Frequency Effects of a CO2 Plasma Flow
复制标题
CO2 等离子体流高频效应的高速成像
DOI：
10.2514/1.t4787
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发表时间：
2017
影响因子：
2.1
通讯作者：
S. Löhle
中科院分区：
文献类型：
--
作者：
F. Zander;T. Marynowski;S. Löhle
这项工作提出了一个CO2等离子体流的高频行为的调查结果。高速成像系统与窄带滤波器结合使用，以测量空间、光谱和高时间分辨率的数据。过滤器被选择为针对原子氧和碳的单独跃迁。使用阿贝尔变换算法处理的数据集，允许提取的发射系数，上态数密度，和电子激发温度。结果表明，一个明显的300赫兹脉冲，这是空间上一致的整个流场。这两个氧排放量的测量是空间上相似的，但是，碳排放量的测量显示出明显的空间分布差异。在发射系数和上态数密度的变化，在空间和时间上，是由于在等离子体发生器，这是由周期性电源所造成的变化的电子属性。那个...
This work presents the results of the investigation into the high-frequency behavior of a CO2 plasma flow. A high-speed imaging system is used in conjunction with narrow-bandwidth filters to measure spatially, spectrally, and highly temporally resolved data. The filters are selected to target individual transitions of atomic oxygen and carbon. The data sets are processed using an Abel transform algorithm allowing the extraction of the emission coefficient, upper-state number densities, and electronic excitation temperatures. The results show a distinct 300 Hz pulsing, which is spatially consistent across the entire flowfield. The two oxygen emission measurements are spatially similar; however, the carbon emission measurements show distinct differences in spatial distribution. The variations in emission coefficient and upper-state number density, both spatially and temporally, are attributed to the varying electron properties produced in the plasma generator, which is caused by the cyclic power supply. The...