Identyfikatory
Warianty tytułu
Języki publikacji
Abstrakty
A technique of the temperature dependent thermal diffusivity investigation has been analysed. The technique is based on the modified Angstrom method utilising periodic temperature oscillations in a slab specimen. The additional modification consists of imposing linear temperature changes - application of linear scans. This scanning mode procedure enables investigation of the thermal diffusivity over a certain temperature interval. The thermal diffusivity is calculated independently from two relations based on the measured amplitude attenuation and the measured phase shift of the temperature oscillation passing through the investigated specimen. The paper discuses the problem of the thermal diffusivity identification uncertainty. As a result correction factors for the thermal diffusivity data derived from simplified formulae have been determined. The procedure of the thermal diffusivity measurement has been verified by numerical modelling. Comparison between the initial and response signals with illustration of the linear scan imposed to a basic oscillation with reference to a classical procedure of subsequent steps, illustration of the approximation error analysis methodology and results in the form of a thermal diffusivity correction factor, comparison between the uncorrected and corrected applying in numerical modelling of the temperature oscillation experiment are presented in the paper.
Wydawca
Czasopismo
Rocznik
Tom
Strony
339--347
Opis fizyczny
Bibliogr. 16 poz., rys.
Twórcy
autor
autor
- Military University of Technology, Institute of Aviation Technology Gen. S. Kaliskiego Street 2, 00-908 Warszawa, Poland tel.: +48 22 6839543, fax: +48 22 6837581, Andrzej.Panas@itwl.pl
Bibliografia
- [1] Belling, J. M., Unsworth, J., Modified Ångström‘s method for measurement of thermal diffusivity of materials with low conductivity, Rev. Sci. Instrum., Vol. 58 (6), pp. 997-1002, 1987.
- [2] Bodzenta, J., Buraka, B., Nowak, M., Pyka, M., Szałajko, M., Tanasiewicz, M., Measurement of the thermal diffusivity of dental filling materials using modified Angstrom's method, Dental Materials, pp. 617–6212006. Vol. 22.
- [3] Bodzenta, J., Thermal wave methods in investigation of thermal properties of solids, Eur. Phys. J. Special Topics., 154. p. 305-311, 2008.
- [4] Carslaw, H. S., Jaeger, J. C., Conduction of Heat in Solids, 2nd Edition, Oxford – Clarendon Press, pp. 102-105, 105-112, London 2003.
- [5] de Coninck, R., Peletsky, V. E., Electron Bombardment Modulated Heat Input In Magli K. D., Cezairliyan A. and Peletsky V. E., eds.: Compendium of Thermophysical Property Measurement Methods. Plenum Press, pp. 367-428, New York 1984.
- [6] Friis-Pedersen, H. H., Pedersen, J. H., Haussler, L., Storm, B. K., Online measurement of thermal diffusivity during cure of an epoxy composite, Polymer testing, Vol. 25, pp. 1059- 1068, 2006.
- [7] Kapischke, J., Hapke, J., Measurement of the effective thermal conductivity of a Mg-MgH2 packed bed with oscillating heating, Experimental Thermal and Fluid Science, Vol. 17, p. 347-355, 1998.
- [8] Kubičar, L., Pulse Method of measuring Basic Thermophysical Parameters, Elsevier Sc. Publ. Co., Inc. and Veda Publ. House of the Slovak Academy of Sciences (Thermal Analysis, V. XII, Part E, A Sub-Series of Monographs Ed. by W.W. Wendlandt), 1990.
- [9] Lykov, A. V., Tieoria tirploprovodnosti, Vyshaia Schola, pp. 274-321, Moskva 1967.
- [10] Maglić, K. D., Cezairliyan, A., Peletsky, V. E., eds. Compendium of Thermophysical Property Measurement Methods, Plenum Press, New York 1984.
- [11] Özişik, M. N., Heat Conduction, 2-nd Ed., John Willey & Sons, Inc. pp. 204-208, New York 1993.
- [12] Panas, A. J., Tkaczyk, P., Development of a test stand for dynamic investigation of composite shell structure thermal property, Military University of Technology Report No 992/WAT/2008, Warsaw 2009 (in Polish).
- [13] Panas, A. J., Nowakowski, M., Numerical validation of the scanning mode procedure of thermal diffusivity investigation applying temperature oscillation, Thermophysics 2009 Proceedings, Brno University of Technology, Faculty of Chemistry, pp. 252-259, Valtice, 2009.
- [14] Patle, S. D., Analysis and measurement of thermophysical properties by temperature oscillation, PhD Thesis, National Institute of Technology Rourkela, India 2006.
- [15] Phylippov, L. P. Temperature Wave Techniques, In Maglić K. D., Cezairliyan A. and Peletsky V. E., eds.: Compendium of Thermophysical Property Measurement Methods. Plenum Press, pp. 337-365, New York 1984.
- [16] Tikhonov, A. N., Samarski, A. A., Equations of mathematical physics. 5th ed., Nauka, pp. 241-250, Moskva 1977.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ5-0039-0041