高超声速再入试验的辐射光谱定量测量

余晓娅; 刘立拓; 李瑞; 王同权

doi:10.3788/CO.20201301.0087

Volume 13 Issue 1

Feb. 2020

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Chinese Optics > 2020 > 13(1): 87-94.

YU Xiao-ya, LIU Li-tuo, LI Rui, WANG Tong-quan. Measurements of absolute radiative emissions for supersonic reentry[J]. Chinese Optics, 2020, 13(1): 87-94. doi: 10.3788/CO.20201301.0087

Citation:

YU Xiao-ya, LIU Li-tuo, LI Rui, WANG Tong-quan. Measurements of absolute radiative emissions for supersonic reentry[J]. Chinese Optics, 2020, 13(1): 87-94. doi: 10.3788/CO.20201301.0087

YU Xiao-ya, LIU Li-tuo, LI Rui, WANG Tong-quan. Measurements of absolute radiative emissions for supersonic reentry[J]. Chinese Optics, 2020, 13(1): 87-94. doi: 10.3788/CO.20201301.0087

Citation:

YU Xiao-ya, LIU Li-tuo, LI Rui, WANG Tong-quan. Measurements of absolute radiative emissions for supersonic reentry[J]. Chinese Optics, 2020, 13(1): 87-94. doi: 10.3788/CO.20201301.0087

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Measurements of absolute radiative emissions for supersonic reentry

doi: 10.3788/CO.20201301.0087

YU Xiao-ya^{1, †
,},
LIU Li-tuo^{2, †
,
,},
LI Rui¹,
WANG Tong-quan¹

1.
Key Laboratory of Experimental Physics and Computational Mathematics, Beijing 100094, China
2.
Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100024, China

Funds:

National Natural Science Foundation of China Youth Project 61404171

More Information

Corresponding author: LIU Li-tuo, Email:liulituo@ime.ac.cn
Received Date: 09 Sep 2019
Rev Recd Date: 08 Nov 2019
Publish Date: 01 Feb 2020

Abstract

Abstract

An expansion tube facility was operated using two half-cylinder models with width of 45 mm and 90 mm respectively for producing high-enthalpy flows at the nominal velocity of 8 km/s relevant to Earth reentry. Spatially resolved emission spectroscopy in the wavelength range from 250 nm to 550 nm behind a shock wave was recorded by a spectrometer with ICCD camera. Shock wave stagnation streamline was observed along the flow direction. It is found that the spectrum are dominated by the CN(B-X) violet band. A halogen tungsten lamp was used to realize calibration and the absolute radiation luminance of the shock layer was obtained. By comparing the model widths normalized by two kinds of model radiances, it can be found that there is a strong self-absorption of high temperature gas radiation around the flow fluid. In addition, three-dimensional effect was observed. It can be found that the ratio between spectral radiance at 385.2 nm in the CN(B-X) violet 3-3 band and spectral radiance at 388.4 nm in the CN(B-X) violet 0-0 band is decreasing along the distance toward the model edge. The results illuminated that dynamical non-equilibrium features exists in the shock layer along the distance of the model edge.
- expansion tube,
- hypersonic flow,
- absolute radiation measurement

†These authors contribute equally

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References(25)

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