Numerical investigations of the lateral heat transfer in coaxial thermocouples

doi:10.1080/10407782.2022.2078586

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Numerical investigations of the lateral heat transfer in coaxial thermocouples
	Qi, Li 2,3; Han, Guilai 1,2,3; Hu, Zongmin 2,3; Wang, Chun 2,3; Jiang, Zonglin 2,3
刊名	NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
	2022-05-17
页码	19
关键词	Coaxial thermocouples lateral heat transfer maximum temperature point numerical simulation surface heat flux
ISSN号	1040-7782
DOI	10.1080/10407782.2022.2078586
通讯作者	Han, Guilai(hanguilai@imech.ac.cn)
英文摘要	Coaxial thermocouples have been widely used for transient heat transfer measurements in high-enthalpy shock tunnels. The one-dimensional semi-infinite heat conduction theory is typically used for temperature data processing. However, due to the material difference between the two electrodes and the junction, lateral heat transfer occurs, causing a deviation in the heat flux measurement from the prediction results of the one-dimensional semi-infinite heat conduction theory. Thus, the lateral heat transfer effect has to be investigated to improve the accuracy and reliability of heat flux measurements. In this article, the heat transfer in E-type (chromel-constantan) coaxial thermocouples was analyzed by numerically solving the two-dimensional axisymmetric heat conduction equation with the Du Fort-Frankel scheme. During the heating process, the maximum temperature point on the surface of the coaxial thermocouples moved to the positive electrode over time. The numerical simulation indicated that the surface temperature of the coaxial thermocouples and the derived heat flux were larger than the theoretical value. The heat flux measurement error of the coaxial thermocouples can be reduced by increasing the width of the positive electrode. The results of this study can provide a reference for the design and manufacture of coaxial thermocouples.
资助项目	National Key Research and Development Program[2016YFA040801] ; Open Fund of National Key Laboratory of Transient Physics[6142604180205] ; National Natural Science Foundation of China[11872066] ; National Natural Science Foundation of China[11727901] ; National Natural Science Foundation of China[11532014]
WOS关键词	SURFACE JUNCTION THERMOCOUPLES ; FLUX MEASUREMENT ; THERMAL PRODUCT ; TEMPERATURE ; MODEL ; TIME
WOS研究方向	Thermodynamics ; Mechanics
语种	英语
WOS记录号	WOS:000807634100001
资助机构	National Key Research and Development Program ; Open Fund of National Key Laboratory of Transient Physics ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89591]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Han, Guilai
作者单位	1.Nanjing Univ Sci & Technol, Natl Key Lab Transient Phys, Nanjing, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, 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	Qi, Li,Han, Guilai,Hu, Zongmin,et al. Numerical investigations of the lateral heat transfer in coaxial thermocouples[J]. NUMERICAL HEAT TRANSFER PART A-APPLICATIONS,2022:19.
APA	Qi, Li,Han, Guilai,Hu, Zongmin,Wang, Chun,&Jiang, Zonglin.(2022).Numerical investigations of the lateral heat transfer in coaxial thermocouples.NUMERICAL HEAT TRANSFER PART A-APPLICATIONS,19.
MLA	Qi, Li,et al."Numerical investigations of the lateral heat transfer in coaxial thermocouples".NUMERICAL HEAT TRANSFER PART A-APPLICATIONS (2022):19.