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On the response of coaxial surface thermocouples for transient aerodynamic heating measurements
Li JP(李进平); Chen H(陈宏); Zhang SZ(张仕忠); Zhang XY(张晓源); Yu HR(俞鸿儒); Chen, H (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Source PublicationEXPERIMENTAL THERMAL AND FLUID SCIENCE
2017-09-01
Volume86Pages:141-148
ISSN0894-1777
Abstract

Surface thermocouples are widely used in transient aerodynamic heating measurements but their response often exhibits uncertainty and unpredictability resulting in poor accuracy of measurement. To address this issue and provide reference information on their fabrication the response of coaxial surface thermocouples was investigated numerically and experimentally. From the numerical simulations it was observed that the heat blocking effect of the insulation layer can change the response of a thermocouple which strongly depends on the structure of the junction at short test times. Nevertheless with increasing time the response tends to be independent of the junction and be consistent with the prediction of the commonly used one-dimensional heat conduction model. Owing to the difficulty in controlling the junction these observations not only account for the uncertainty and unpredictability of the response but also suggest that for ensuring accurate measurements a sufficiently long test time is necessary. The simulation also shows that the response of a thermocouple is insensitive to the properties of the insulation layer and that the duration of an uncertain response decreases dramatically with the thickness of the layer. To improve the performance of a surface thermocouple additional effort should be directed at reducing the thickness of the insulation layer rather than enhancing its thermal properties. The shock tube experiments confirmed the achieved numerical results and demonstrated a practical calibration technique for heat transfer gauges. (C) 2017 Elsevier Inc. All rights reserved.

KeywordHeat Flux Measurement Thermocouple Response Characteristics Shock Tube
DOI10.1016/j.expthermflusci.2017.04.011
Indexed BySCI ; EI
Language英语
WOS IDWOS:000401883900013
WOS KeywordJUNCTION THERMOCOUPLES ; FLUX
WOS Research AreaThermodynamics ; Engineering ; Physics
WOS SubjectThermodynamics ; Engineering, Mechanical ; Physics, Fluids & Plasmas
Funding OrganizationNational Natural Science Foundation of China(11472280)
DepartmentLHD解离气体动力学
Classification二类/Q1
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60531
Collection高温气体动力学国家重点实验室
Corresponding AuthorChen, H (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Li JP,Chen H,Zhang SZ,et al. On the response of coaxial surface thermocouples for transient aerodynamic heating measurements[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE,2017,86:141-148.
APA 李进平,陈宏,张仕忠,张晓源,俞鸿儒,&Chen, H .(2017).On the response of coaxial surface thermocouples for transient aerodynamic heating measurements.EXPERIMENTAL THERMAL AND FLUID SCIENCE,86,141-148.
MLA 李进平,et al."On the response of coaxial surface thermocouples for transient aerodynamic heating measurements".EXPERIMENTAL THERMAL AND FLUID SCIENCE 86(2017):141-148.
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