Characterization of reflected shock tunnel freestream in carbon dioxide

doi:10.1007/s00348-025-03967-5

	Characterization of reflected shock tunnel freestream in carbon dioxide
	Liu Z(刘卓)1,2,3 ; Li RJ(李仁杰)1,2 ; Wang Q(汪球)1; Li, Fei1 ; Gu, Sangdi 3
通讯作者	Wang, Qiu([email protected])
发表期刊	EXPERIMENTS IN FLUIDS
	2025-02-01
卷号	66 期号:2 页码:16
ISSN	0723-4864
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.
DOI	10.1007/s00348-025-03967-5
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001408796800002
关键词[WOS]	NITRIC-OXIDE ; SPECTROSCOPY ; WAVELENGTH ; FLOW ; CO2
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
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]
项目资助者	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
论文分区	二类
力学所作者排名	1
RpAuthor	Wang, Qiu
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/98271
专题	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.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 101400, Peoples R China; 3.Hong Kong Polytech Univ, Dept Aeronaut & Aviat Engn, Kowloon, Hong Kong, 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.Rp_Au:Wang, Qiu
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.