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Nitrogen molecular radiation in hypersonic expanding flow

文献类型：期刊论文

作者Zhang SH(张森豪)1,2; Wang JY(王嘉莹)1,2; Bai, Tianrui3; Xu YX(许以欣)1,2; Zhang XY(张晓源)1; Zhang SZ(张仕忠)1; Lin X(林鑫)1; Li JP(李进平)1; Li F(李飞)1
刊名PHYSICS OF FLUIDS
出版日期2025-02-01
卷号37期号:2
ISSN号1070-6631
DOI10.1063/5.0251388
英文摘要This study investigates nitrogen molecular radiation in hypersonic expanding flow around a two-dimensional model. Experiments were conducted using the JF-14 shock tunnel in shock tube mode, generating a 3.25 km/s shock wave to create the required flow. A blunt model with a 25-mm nose radius was used to generate the expanding flow. Spatially resolved visible spectra were measured around the model's shoulder. Numerical simulations were then conducted to analyze flow properties and spectral distributions. The results show that the N2 first positive system dominates emissions in the 500-750 nm range. The spectral profiles matched well between experiment and simulation, but predicted intensities were 3-4 times higher, likely due to an overestimation of the excited state density in the model. A detected spectral line near 520 nm, close to the wall, suggests that the predissociation may have been underestimated. This work extends experimental data on hypersonic expanding flow, contributing to an improved understanding of radiation in such flows.
分类号一类/力学重要期刊
WOS研究方向Mechanics ; Physics, Fluids & Plasmas ; Physics
语种英语
WOS记录号WOS:001416757900003
资助机构This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Number XDB0620202), the Key-Area Research and Development Program of Guangdong Province (Grant Number 2021B0909060004), and the National Natural Science Foundation of China (Grant Numbers 12072355 and 92271117). The authors thank Mr. Yuzhe Zhang, Mr. Wentao Wang, and Ms. Bin Shang for their valuable input to the discussion on spectra theory. Special thanks to Mr. Ziang Liu for his invaluable assistance in the shock tunnel operations. The authors also wish to thank Professor Xiaoyong Wang for his support in the computational work.
其他责任者李飞
源URL[http://dspace.imech.ac.cn/handle/311007/101454]  
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.Institute of Mechanics, CAS;
2.University of Chinese Academy of Sciences, CAS;
3.Jiangsu University of Science & Technology
推荐引用方式
GB/T 7714		 Zhang SH,Wang JY,Bai, Tianrui,et al. Nitrogen molecular radiation in hypersonic expanding flow[J]. PHYSICS OF FLUIDS,2025,37(2).
APA 张森豪.,王嘉莹.,Bai, Tianrui.,许以欣.,张晓源.,...&李飞.(2025).Nitrogen molecular radiation in hypersonic expanding flow.PHYSICS OF FLUIDS,37(2).
MLA 张森豪,et al."Nitrogen molecular radiation in hypersonic expanding flow".PHYSICS OF FLUIDS 37.2(2025).

入库方式： OAI收割

来源：力学研究所

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