| 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
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| Corresponding Author | Han, Guilai([email protected]) |
| Source Publication | NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
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| 2022-05-17 | |
| Pages | 19 |
| ISSN | 1040-7782 |
| Abstract | 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. |
| Keyword | Coaxial thermocouples lateral heat transfer maximum temperature point numerical simulation surface heat flux |
| DOI | 10.1080/10407782.2022.2078586 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000807634100001 |
| WOS Keyword | SURFACE JUNCTION THERMOCOUPLES ; FLUX MEASUREMENT ; THERMAL PRODUCT ; TEMPERATURE ; MODEL ; TIME |
| WOS Research Area | Thermodynamics ; Mechanics |
| WOS Subject | Thermodynamics ; Mechanics |
| Funding Project | 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] |
| Funding Organization | National Key Research and Development Program ; Open Fund of National Key Laboratory of Transient Physics ; National Natural Science Foundation of China |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Han, Guilai |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/89592 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Han, Guilai |
| 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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| Jp2022FA364.pdf（3726KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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