Abstract
This study demonstrated the technical feasibility of the manufacturing process for a fast-response, small-sized coil-type coaxial surface-junction thermocouple. The performance of the coil-type coaxial surface-junction thermocouple was thoroughly assessed in a highspeed environment using a shock tunnel, operating at a nominal freestream Mach number of 6. To evaluate its efficacy, the measured surface heat flux data from the coil-type coaxial thermocouple were compared with results obtained from conventional coaxial surface-junction thermocouples, as well as theoretical predictions. Based on the experimental data, it is evident that the proposed coil-type coaxial surface-junction thermocouple is a viable option for use in a shock tunnel environment, exhibiting performance levels that are comparable to those of conventional coaxial surface-junction thermocouples. Moreover, when compared to conventional thermocouples, the proposed coil-type coaxial surface-junction thermocouple offers the potential to manufacture smaller-sized sensors using a cost-effective and straightforward process, owing to its simplified design and manufacturing method.
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This work was supported by the Agency for Defense Development Grant Funded by the Korean Government (UG2000 64GD).
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Sangha Park is a former Post-Doctoral Researcher in the Mechanical Engineering Research Institute at Korea Advanced Institute of Science and Technology, and currently Senior Researcher in the Aerospace Technology Research Institute at Agency for Defense Development. His research interests include ground test, test instrument, and aerothermodynamics.
Hyunsuk Lee is currently a Ph.D. student in the Department of Aerospace Engineering at Korea Advanced Institute of Science and Technology. His research interests include force measurement in hypersonic ground test environments and low density flow.
Byungkook Jang is currently a Ph.D. student in the Department of Aerospace Engineering at Korea Advanced Institute of Science and Technology. His research interests include measurement techniques of physical properties in highspeed ground test facilities.
Jeongwoo Kim is currently a Principal Researcher in the Defense Test & Evaluation Research Institute at Agency for Defense Development. His research interests include aircraft engine testing and high-enthalpy flow testing.
Gisu Park is currently an Associate Professor in Department of Aerospace Engineering at Korea Advanced Institute of Science and Technology. His research interests include hypersonic aerothermodynamics, ground test facilities and instrumentations.
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Park, S., Lee, H., Jang, B. et al. Technical study of fast-response coil-type coaxial surface junction thermocouple. J Mech Sci Technol 38, 1463–1471 (2024). https://doi.org/10.1007/s12206-024-0238-2
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DOI: https://doi.org/10.1007/s12206-024-0238-2