Abstract To investigate the ablation process of a carbon steel model, emission spectroscopy was applied in a 20 MW arc-heater. 21 frames of spectral data were captured in the 4-seconds test, which consists of the radiation from Oxygen, Nitrogen, Copper, Iron, Potassium, Sodium, Chromium, and Calcium. Atom species, gas temperature and number density at 2.7 s after ignition (start power supply) were determined, the gas temperature is finally determined as 6700 ± 400 Kelvin. The temperature and number density evolution during the test was given based on the time series spectral data, which show us that the temperature results calculated by atom spectral lines of Copper (510.5/515.3), Iron (527.3/537.3) and Nitrogen (862.9/871.1) were reliable, the constant value of temperature and number density also confirm the stability of the test condition.

中文翻译：

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发射光谱在高速高温流场材料烧蚀研究中的应用

摘要 为了研究碳钢模型的烧蚀过程，将发射光谱应用于 20 MW 电弧加热器。在 4 秒的测试中捕获了 21 帧光谱数据，其中包括来自氧、氮、铜、铁、钾、钠、铬和钙的辐射。测定点火（启动电源）后2.7 s时的原子种类、气体温度和数密度，最终确定气体温度为6700±400开尔文。根据时间序列光谱数据给出了试验过程中的温度和数密度演变，这表明通过铜（510.5/515.3）、铁（527.3/537.3）和氮（862.9/ 871.1) 是可靠的，温度和数密度的恒定值也证实了测试条件的稳定性。