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Characterization of reflected shock tunnel freestream in carbon dioxide

文献类型：期刊论文

作者Liu Z(刘卓)1,2,3; Li RJ(李仁杰)2,3; Wang Q(汪球)3; Li, Fei3; Gu, Sangdi1
刊名EXPERIMENTS IN FLUIDS
出版日期2025-02-01
卷号66期号:2页码:16
ISSN号0723-4864
DOI10.1007/s00348-025-03967-5
通讯作者Wang, Qiu(wangqiu@imech.ac.cn)
英文摘要In this study, the JFX reflected shock tunnel freestream is characterized using pitot probes, laser absorption spectroscopy, and high-speed schlieren for shock stand-off distances over a sphere. The experiment employed two driver gases: a mixture of H2 and CO2, and pure He. Three lasers, operating at wavelengths around 2.0 mu m\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\upmu \mathrm{m}$$\end{document} and 1.4 mu m\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\upmu \mathrm{m}$$\end{document} with a scanning frequency of 50 kHz, were utilized to measure the properties of CO2 and H2O. Computational fluid dynamics simulations showed near thermo-equilibrium conditions, supporting the use of an equilibrium model to determine the temperature and partial pressure of the two species. Isentropic calculations indicate that there is no significant thermodynamic nonequilibrium in the freestream. During the effective test time, the measured and simulated results were in good agreement for both the shock stand-off distance and CO2 partial pressure. However, the detection of H2O indicated contamination from the driver gas, with early onset leading to an increase in the shock stand-off distance. The uncontaminated time is around 700-800 mu s\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\upmu \mathrm{s}$$\end{document} for both conditions, and the contamination onset time falls between the predicted values using different nozzle conditions, which also indicates a certain degree of contamination.
分类号二类
WOS关键词NITRIC-OXIDE ; SPECTROSCOPY ; WAVELENGTH ; FLOW ; CO2
资助项目Key-Area Research and Development Program of Guangdong Province[2021B0909060004] ; National Natural Science Foundation of China[12072352] ; National Natural Science Foundation of China[12232018] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB 0620203] ; Youth Innovation Promotion Association CAS[2021020]
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:001408796800002
资助机构Key-Area Research and Development Program of Guangdong Province ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS
其他责任者Wang, Qiu
源URL[http://dspace.imech.ac.cn/handle/311007/98270]  
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.Hong Kong Polytech Univ, Dept Aeronaut & Aviat Engn, Kowloon, Hong Kong, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101400, Peoples R China;
3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Liu Z,Li RJ,Wang Q,et al. Characterization of reflected shock tunnel freestream in carbon dioxide[J]. EXPERIMENTS IN FLUIDS,2025,66(2):16.
APA 刘卓,李仁杰,汪球,Li, Fei,&Gu, Sangdi.(2025).Characterization of reflected shock tunnel freestream in carbon dioxide.EXPERIMENTS IN FLUIDS,66(2),16.
MLA 刘卓,et al."Characterization of reflected shock tunnel freestream in carbon dioxide".EXPERIMENTS IN FLUIDS 66.2(2025):16.

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来源：力学研究所

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