Numerical investigations of the lateral heat transfer in coaxial thermocouples

doi:10.1080/10407782.2022.2078586

	Numerical investigations of the lateral heat transfer in coaxial thermocouples
	Qi L(齐力)1,2 ; Han GL(韩桂来)1,2,3 ; Hu ZM(胡宗民)1,2 ; Wang C(王春)1,2 ; Jiang ZL(姜宗林)1,2
通讯作者	Han, Guilai(hanguilai@imech.ac.cn)
发表期刊	NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
	2022-05-17
页码	19
ISSN	1040-7782
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.
关键词	Coaxial thermocouples lateral heat transfer maximum temperature point numerical simulation surface heat flux
DOI	10.1080/10407782.2022.2078586
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000807634100001
关键词[WOS]	SURFACE JUNCTION THERMOCOUPLES ; FLUX MEASUREMENT ; THERMAL PRODUCT ; TEMPERATURE ; MODEL ; TIME
WOS研究方向	Thermodynamics ; Mechanics
WOS类目	Thermodynamics ; Mechanics
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]
项目资助者	National Key Research and Development Program ; Open Fund of National Key Laboratory of Transient Physics ; National Natural Science Foundation of China
论文分区	二类
力学所作者排名	1
RpAuthor	Han, Guilai
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/89592
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, Peoples R China; 3.Nanjing Univ Sci & Technol, Natl Key Lab Transient Phys, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Qi L,Han GL,Hu ZM,et al. Numerical investigations of the lateral heat transfer in coaxial thermocouples[J]. NUMERICAL HEAT TRANSFER PART A-APPLICATIONS,2022:19.
APA	齐力,韩桂来,胡宗民,王春,&姜宗林.(2022).Numerical investigations of the lateral heat transfer in coaxial thermocouples.NUMERICAL HEAT TRANSFER PART A-APPLICATIONS,19.
MLA	齐力,et al."Numerical investigations of the lateral heat transfer in coaxial thermocouples".NUMERICAL HEAT TRANSFER PART A-APPLICATIONS (2022):19.

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