A solution method for an inverse heat conduction problem suitable for the indirect measurement of thermal conductivity and diffusivity is described. An application to an expe-rimental case is also presented. The employed method allows to reproduce typical cyclic tem-peratures and heat flow of space and planetary exploration missions. An experimental application to an insulation panel irradiated on a face and cooled on the other one is ana-lyzed. Particular attention is dedicated to uncertainty analysis, employing a Monte Carlo si-mulation in order to propagate all uncertainty sources to the indirect measurement of thermal conductivity and diffusivity. Two different hypotheses on the time correlation of the uncertain-ty sources are analyzed. Results are described and discussed for both hypotheses, allowing to obtain suitable uncertainty values for the desired output quantities.

METHOD FOR THERMAL CONDUCTIVITY AND DIFFUSIVITY MEASUREMENT SUITABLE FOR SPACE APPLICATIONS

PERTILE, MARCO;DEBEI, STEFANO;
2009

Abstract

A solution method for an inverse heat conduction problem suitable for the indirect measurement of thermal conductivity and diffusivity is described. An application to an expe-rimental case is also presented. The employed method allows to reproduce typical cyclic tem-peratures and heat flow of space and planetary exploration missions. An experimental application to an insulation panel irradiated on a face and cooled on the other one is ana-lyzed. Particular attention is dedicated to uncertainty analysis, employing a Monte Carlo si-mulation in order to propagate all uncertainty sources to the indirect measurement of thermal conductivity and diffusivity. Two different hypotheses on the time correlation of the uncertain-ty sources are analyzed. Results are described and discussed for both hypotheses, allowing to obtain suitable uncertainty values for the desired output quantities.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/188404
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