Technical Briefs

Dynamic Calibration of a Coaxial Thermocouples for Short Duration Transient Measurements

[+] Author and Article Information
Rakesh Kumar

Research Scholar

Niranjan Sahoo

Associate Professor
e-mail: shock@iitg.ernet.in
Department of Mechanical Engineering,
Indian Institute of Technology Guwahati,
Guwahati 781 039, India

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received May 31, 2012; final manuscript received May 5, 2013; published online September 27, 2013. Assoc. Editor: Oronzio Manca.

J. Heat Transfer 135(12), 124502 (Sep 27, 2013) (7 pages) Paper No: HT-12-1258; doi: 10.1115/1.4024593 History: Received May 31, 2012; Revised May 05, 2013

Coaxial thermocouple sensors are suitable for measuring highly transient surface heat fluxes because the response times of these sensors are very small (∼0.1 ms). These robust sensors have the flexibility of mounting them directly on the surface of any geometry. So, they have been routinely used in ground-based impulse facilities as temperature sensors where rapid changes in heat loads are expected on aerodynamic models. Subsequently, the surface heat fluxes are predicted from the transient temperatures by appropriate one-dimensional heat conduction modeling for semi-infinite body. In this backdrop, the purpose of this work is to design and fabricate K-type coaxial thermocouples in-house and calibrate them under similar nature of heat loads by using simple laboratory instruments. Here, two methods of dynamic calibration of coaxial thermocouples have been discussed, where the known step loads are applied through radiation and conduction modes of heat transfer. Using appropriate one dimensional heat conduction modeling, the surface heat fluxes are predicted from the measured temperature histories and subsequently compared with the input heat loads. The recovery of surface heat flux from laser based calibration experiment under-predicts by 4% from its true input heat load. Similarly, recovery of surface heat flux from the conduction mode calibration experiments under-predicts 6% from its true input value. Further, finite-element based numerical study is performed on the coaxial thermocouple model to obtain surface temperatures with same heat loads as used in the experiments. The recovery of surface temperatures from finite element simulation is achieved within an accuracy of ±0.3% from the experiment.

Copyright © 2013 by ASME
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Henze, M., Bogdanic, L., Muehlbauer, K., and Schnieder, M., 2013, “Effect of the Biot Number on Metal Temperature of Thermal Barrier Coated Turbine Parts—Real Engine Measurements,” ASME J. Turbomach., 135(3), p. 031029. [CrossRef]
Lei, J. F., and Will, H. A., 1998, “Thin Film Thermocouples and Strain Gauge Technologies for Engine Applications,” Sens. Actuators, A, 65, pp. 197–193. [CrossRef]
Werschmoeller, D., Xiaochun, L., and Ehmann, K., 2012, “Measurement of Transient Tool Internal Temperature Fields During Hard Turning by Insert Embedded Thin Film Sensors,” ASME J. Manuf. Sci. Eng., 134(6), p. 061004. [CrossRef]
Chester, N. L., Wells, M. A., and Prodanovic, V., 2012, “Effect of Inclination Angle and Flow Rate on the Heat Transfer During Bottom Jet Cooling of a Steel Plate,” ASME J. Heat Transfer, 134(12), p. 122201. [CrossRef]
Vidal, R. J., 1956, “Model Instrumentation Techniques for Heat Transfer and Force Measurements in a Hypersonic Shock Tunnel,” Cornell Aeronautical Laboratory, WADC TN 56-315.
Schultz, D. L., and Jones, T. V., 1973, “Heat Transfers Measurements in Short Duration Hypersonic Facilities,” AGARDograph-AG-165.
Sahoo, N., and Peetala, R. K., 2010, “Transient Temperature Data Analysis for a Supersonic Flight Test,” ASME J. Heat Transfer, 132(8), p. 084503. [CrossRef]
Cardenas, C., Fabris, D., Tokairin, S., Madriz, F., and Yang, C. Y., 2012, “Thermoreflectance Measurement of Temperature and Thermal Resistance of Thin Film Gold,” ASME J. Heat Transfer, 134(11), p. 111401. [CrossRef]
Menezes, V., and Bhat, S., 2010, “A Coaxial Thermocouple for Shock Tunnel Applications,” Rev. Sci. Instrum., 81(10), p. 104905. [CrossRef] [PubMed]
Lorenz, M., Horbach, T., Schulz, A., and Bauer, H. J., 2013, “A Novel Measuring Technique Utilizing Temperature Sensitive Paint—Measurement Procedure, Validation, Application, and Comparison With Infrared Thermography,” ASME J. Turbomach., 135(3), p. 031003. [CrossRef]
Kumar, R., Sahoo, N., and Kulkarni, V., 2010, “Design, Fabrication and Calibration of Heat Transfer Gauges for Transient Measurement,” ASME Conference, Nov. 12–18, 2010, Vancouver, British Columbia, Canada, IMECE2010.
Kumar, R., Sahoo, N., Kulkarni, V., and Singh, A., 2011, “Laser Based Calibration Technique for Thin Film Sensors for Short Duration Transient Measurements,” ASME J. Thermal Sci. Eng. Appl., 3(4), p. 044504. [CrossRef]
Kumar, R., Sahoo, N., and Kulkarni, V., 2012, “Conduction Based Calibration of Handmade Platinum Thin Film Heat Transfer Gauges for Transient Measurements,” Int. J. Heat Mass Transfer, 55(9), pp. 2707–2713. [CrossRef]
Olivier, H., and Gronig, H., 1995, “Instrument Techniques of the Aachen Shock Tunnel TH2,” International Congress on Instrumentation in Aerospace Simulation Facilities, ICIASF 95, July 18–21, Wright-Patterson AFB, CH3482-3489.
Sanderson, S. R., and Sturtevant, B., 2002, “Transient Heat Flux Measurement Using a Surface Junction Thermocouple,” Rev. Sci. Instrum., 73(7), pp. 2781–2787. [CrossRef]
Buttsworth, D. R., 2001, “Assessment of Effective Thermal Product of Surface Junction Thermocouples on Millisecond and Microsecond Time Scales,” Exp. Therm. Fluid Sci., 25(6), pp. 409–429. [CrossRef]
Gatowski, J. A., Smith, M. K., and Alkidas, A. C., 1989, “An Experimental Investigation of Surface Thermometry and Heat Flux,” Exp. Therm. Fluid Sci., 2(3), pp. 280–285. [CrossRef]
Mohammed, H. A., Salleh, H., and Yusoff, M. Z., 2011, “Dynamic Calibration and Performance of Reliable and Fast Response Temperature Probes in a Shock Tube Facility,” Exp. Heat Transfer, 24(2), pp. 109–132. [CrossRef]
Smith, D. E., Bubb, J. V., Popp, O., Diller, T. E., and Hevey, S. J., 1999, “A Comparison of Radiation Versus Convection Calibration of Thin-Film Heat Flux Gauges,” Proceedings of the ASME Heat Transfer Division, HTD, Vol. 364(4), pp. 79–84.
Holmberg, D. G., and Diller, T. E., 1995, “High-Frequency Heat Flux Sensor Calibration and Modeling,” ASME J. Fluids Eng., 117(4), pp. 659–664. [CrossRef]
Taler, J., 1996, “Theory of Transient Experimental Techniques for Surface Heat Transfer,” Int. J. Heat Mass Transfer, 39(17), pp. 3733–3748. [CrossRef]
Sahoo, N., and Peetala, R. K., 2011, “Transient Surface Heating Rates From a Nickel Film Sensor Using Inverse Analysis,” Int. J. Heat Mass Transfer, 54(5), pp. 1297–1302. [CrossRef]
Chung, M., and Brill, J. W., 1993, “Specific Heats of Type E Thermocouple Wires,” Rev. Sci. Instrum., 64(7), pp. 2037–2038. [CrossRef]
Shen, B., Xiao, G., Guo, C., Malkin, S., and Shin, A. J., 2008, “Thermocouple Fixation Method for Grinding Temperature Measurement,” ASME J. Manuf. Sci. Eng., 130, p. 051014. [CrossRef]
Mohammed, H., Salleh, H., and Yusoff, Z., 2008, “Design and Fabrication of Coaxial Thermocouple for Transient Heat Transfer Measurements,” Int. J. Heat Mass Transfer, 35(7), pp. 853–859. [CrossRef]
Sundqvist, B., 1992, “Thermal Diffusivity and Thermal Conductivity of Chromel, Alumel, and Constantan in the Range 100–450 K,” J. Appl. Phys., 72(2), pp. 539–544. [CrossRef]
Piccini, E., Guo, S. M., and Jones, T. V., 2000, “The Development of a New Direct Heat Flux Gauge for Heat Transfer Facilities,” Meas. Sci. Technol., 11(4), pp. 342–349. [CrossRef]
Moffat, R. J., 1988, “Describing the Uncertainties in Experimental Results,” Exp. Therm. Fluid Sci., 1(1), pp. 3–17. [CrossRef]


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Fig. 1

A coaxial thermocouple (K-type): (a) schematic diagram; (b) geometric configuration

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Fig. 2

Calibration methodology for the co-axial thermocouple

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Fig. 3

Determination of TCR: (a) schematic diagram of oil bath calibration method; (b) variation of voltage during heating and cooling process

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Fig. 4

Schematic representation calibration technique for coaxial thermocouple: (a) laser based experiment (Method I); (b) conduction based experiment (Method II)

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Fig. 5

Comparison of temperature history for various step heat loads: (a) 60 kW/m2; (b) 70 kW/m2; (c) 80 kW/m2; and (d) 90 kW/m2

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Fig. 6

Recovered of surface heat flux by using one-dimensional modeling compared with input heat loads at 60 kW/m2, 70 kW/m2, 80 kW/m2, and 90 kW/m2

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Fig. 7

Finite element modeling of the coaxial thermocouple: (a) and (b) computational model; (c) enlarged view to show the finite element mesh at the interface region




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