Photoacoustic determination of thermophysical properties of thin metallic plates using parameter estimation |
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| Authors: | S W Kim J Lee R E Taylor |
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| Affiliation: | (1) Thermophysical Properties Research Laboratory, School of Mechanical Engineering, Purdue University, 47906 West Lafayette, Indiana, USA;(2) Present address: Temperature Laboratory, Korea Standards Research Institute, P.O. Box 3, 305-606 Taedok Science Town, Taejon, Korea |
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| Abstract: | The phase and the amplitude of the photoacoustic signal were measured as a function of chopping frequency for several kinds of widely used thin metallic plates (stainless steel 304, brass, aluminum, and copper) attached to plexiglass backing. The experimental data have been analyzed systematically by parameter estimation technique based on the two-layer model developed from Rosencwaig-Gersho (R-G) theory. Using this analysis, the values of thermal diffusivity and thermal effusivity of the materials have been determined. |
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| Keywords: | parameter estimation photoacoustic technique thermal diffusivity thermal effusivity |
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