The time and space development of the fluid bulk temperature in a transient heat transfer experiment for internal channel cooling investigations using heater foils is addressed. An analytical solution for uniform heat transfer coefficients is derived which shows the effect of wall heating on the bulk temperature during a transient test run. A simplified model is proposed for characterizing the bulk temperature development by introducing an upstream heat transfer parameter. With this, analytical solutions for the local wall temperature history can be derived. The presented solution can be used for data reduction of transient tests of this kind.
Issue Section:
Technical Notes
1.
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, and Jones
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,” Meas. Sci. Technol.
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.3.
Saabas, J., Arora, S. C., and Abdel Messeh, W., 1987, “Application of the Transient Test Technique to Measure Local Heat Transfer Coefficients Associated With Augmented Airfoil Cooling Passages,” ASME Paper 87-GT-212.
4.
von Wolfersdorf
, J.
, Hoecker
, R.
, and Hirsch
, C.
, 1998
, “A Data Reduction Procedure for Transient Heat Transfer Measurements in Long Internal Cooling Channels
,” ASME J. Heat Transfer
, 120
, pp. 314
–321
.5.
von Wolfersdorf
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, Hoecker
, R.
, and Sattelmayer
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, 1993
, “A Hybrid Transient Step-Heating Heat Transfer Measurement Technique Using Heater Foils and Liquid-Crystal Thermography
,” ASME J. Heat Transfer
, 115
, pp. 319
–324
.6.
Turnbull, W. N., and Oosthuizen, P. H., 1999, “A New Experimental Technique for Measuring Surface Heat Transfer Coefficients Using Uncalibrated Liquid Crystals,” Proceedings of the ASME Heat Transfer Divison. HTD—Vol. 364-4, pp. 121–126.
7.
Turnbull
, W. N.
, and Oosthuizen
, P. H.
, 1999
, “Theoretical Evaluation of New Phase Delay Methods for Measuring Local Heat Transfer Coefficients
,” Trans. Can. Soc. Mech. Eng.
, 23
(3 and 4
), pp. 361
–376
.8.
Farmer, J. P., Seager, D. J., and Liburdy, J. A., 1997, “The Effect of Shaping Inclined Slots on Film Cooling Effectiveness and Heat Transfer Coefficient,” ASME Paper 97-GT-339.
Copyright © 2002
by ASME
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