Spectroscopic Investigation on Anomalous Heating in Free Piston Shock Tunnel HIEST
Spectroscopic Investigation on Anomalous Heating in Free Piston Shock Tunnel HIEST
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DOI：
10.2514/6.2014-2545
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
S. Nomura;H. Takayanagi;K. Fujita;H. Tanno;T. Komuro;K. Itoh
中科院分区：
文献类型：
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作者：
S. Nomura;H. Takayanagi;K. Fujita;H. Tanno;T. Komuro;K. Itoh
将发射光谱技术应用于自由活塞激波隧道（HIEST）的异常加热研究。激波层的发射光谱由铁、铬、镍、铝、铜和碳等杂质的强烈辐射组成。只有在777纳米处原子氧的发射谱线是从测试气体空气中观测到的发射谱线。利用辐射分析程序SPRADIAN2对激波层中这些物质的数量密度和温度进行了估计，发现金属杂质的数量密度比原子氧和原子氮的数量密度低两个数量级以上。温度估计在7500k左右。
Emission spectroscopy is applied to a free piston shock tunnel, HIEST for the study on an anomalous heating. The emission spectra from the shock layer consist of the intense radiation from impurities, such as iron, chromium, nickel, aluminum, copper, and carbon. Only the emission line of atomic oxygen at 777 nm is the observed emission from the test gas, air. The radiation analysis code, SPRADIAN2 is used to estimate the number density of these species and temperature in the shock layer, and the number density of metallic impurities are found to be more than two orders of magnitude lower than those of atomic oxygen and nitrogen. And the temperature is approximately estimated at 7500 K.