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Chemiluminescence and oxygen molecular radiation in hypersonic carbon dioxide expanding flow

文献类型：期刊论文

作者Xu YX(许以欣)1,3; Zhang SH(张森豪)1,3; Nie, Chunsheng2; Gu XQ(谷兴权)1,3; Zhang SZ(张仕忠)1; Wang XY(王小永)1; Lin X(林鑫)1; Wang Q(汪球)1; Li JP(李进平)1; Li F(李飞)1
刊名PHYSICS OF FLUIDS
出版日期2025-07-01
卷号37期号:7页码:13
ISSN号1070-6631
DOI10.1063/5.0275864
通讯作者Li, Fei(Lifei@imech.ac.cn)
英文摘要This study investigates the radiative properties of hypersonic carbon dioxide (CO2) expanding flows. Spatially resolved spectral measurements for the expansion region of a two-dimensional model were conducted in the JF14 shock tunnel. Experiments were performed in a shock tube mode, where the shock wave with velocities ranging from 3.37 to 3.88 km/s directly propagates to the test section, forming a stable flow field around the model. Results showed that the radiation emission within the 250-710 nm range is primarily dominated by CO2 chemiluminescence and Schumann-Runge bands of molecular oxygen (O-2). The intensity of the Schumann-Runge spectrum was found to be significantly higher than the O-2 thermal radiation calculated under the two-temperature (2-T) model, indicating that the O-2 excited state (O-2(B-3)) was overpopulated relative to the Boltzmann distribution in the expansion region. In regions with lower degrees of expansion, the CO2 chemiluminescence intensity was overestimated by about 3 to 6 times, which may be attributed to an overprediction of the atomic oxygen (O) and carbon monoxide (CO) number densities in the current thermochemical model. As the degree of expansion intensified, the CO2 chemiluminescence intensity gradually exceeded the predicted values, suggesting that the expansion process can accelerate the recombination of O and CO, leading to stronger CO2 chemiluminescence. This work enhances the understanding of radiative processes in hypersonic CO2 expanding flow and provides benchmarks for the development of thermochemical and radiative models.
分类号一类/力学重要期刊
资助项目the Strategic Priority Research Program of Chinese Academy of Sciences[XDB0620202] ; Strategic Priority Research Program of the Chinese Academy of Sciences[Y2022008] ; Youth Innovation Promotion Association CAS[92271117] ; National Natural Science Foundation of China
WOS研究方向Mechanics ; Physics
语种英语
WOS记录号WOS:001527989100004
资助机构the Strategic Priority Research Program of Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China
其他责任者李飞
源URL[http://dspace.imech.ac.cn/handle/311007/102074]  
专题力学研究所_高温气体动力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;
2.China Acad Launch Vehicle Technol, Sci & Technol Space Phys Lab, Beijing 100076, Peoples R China
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;
推荐引用方式
GB/T 7714		 Xu YX,Zhang SH,Nie, Chunsheng,et al. Chemiluminescence and oxygen molecular radiation in hypersonic carbon dioxide expanding flow[J]. PHYSICS OF FLUIDS,2025,37(7):13.
APA 许以欣.,张森豪.,Nie, Chunsheng.,谷兴权.,张仕忠.,...&李飞.(2025).Chemiluminescence and oxygen molecular radiation in hypersonic carbon dioxide expanding flow.PHYSICS OF FLUIDS,37(7),13.
MLA 许以欣,et al."Chemiluminescence and oxygen molecular radiation in hypersonic carbon dioxide expanding flow".PHYSICS OF FLUIDS 37.7(2025):13.

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来源：力学研究所

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