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  4. Determination of thermal diffusivity of fibrous insulating materials at high temperatures by thermal wave analysis
 
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2017
Journal Article
Titel

Determination of thermal diffusivity of fibrous insulating materials at high temperatures by thermal wave analysis

Abstract
This work investigates the potential of measuring thermal diffusivity of materials in the high temperature range up to 1580 °C by thermal wave analysis of cylindrical samples. In particular, aiming at the typical situation of fiber insulation materials, the method is evaluated for investigations on heterogeneous media with low thermal conductivity, low density and heat capacity, and significant internal radiative heat transport (participating media). Furthermore, a model for combined conductive and radiative heat transfer is introduced. The model is adapted to a commercial insulation material using experimental scattering and absorption spectra evaluated at 1000 °C. The predictions of this numerical model are in accordance with the thermal diffusivity data obtained from the thermal wave analyses.
Author(s)
Brendel, Harald
Fraunhofer-Institut für Silicatforschung ISC
Seifert, Gerhard
Fraunhofer-Institut für Silicatforschung ISC
Raether, Friedrich
Fraunhofer-Institut für Silicatforschung ISC
Zeitschrift
International journal of heat and mass transfer
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DOI
10.1016/j.ijheatmasstransfer.2017.01.063
Language
English
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Fraunhofer-Institut für Silicatforschung ISC
Tags
  • Isolierstoff

  • Fasern

  • Temperaturleitfähigke...

  • Thermoanalyse

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