Title
Modeling of thermal barrier coating temperature due to transmissive radiative heating
Abbreviated Journal Title
J. Mater. Sci.
Keywords
COUPLED CONDUCTION; TURBINE-ENGINE; REFLECTANCE; DESIGN; LAYER; Materials Science, Multidisciplinary
Abstract
Thermal barrier coatings are generally designed to possess very low thermal conductivity to reduce the conduction heat transfer from the coating surface to the metal turbine blade beneath the coating. In high-temperature power generation systems, however, a considerable amount of radiative heat is produced during the combustion of fuels. This radiative heat can propagate through the coating and heat up the metal blade, and thereby reduce the effectiveness of the coating in lowering the thermal load on the blade. Therefore, radiative properties are essential parameters to design radiative barrier coatings. This article presents a combined radiation and conduction heat transfer model for the steady-state temperature distribution in semitransparent yttria-stabilized zirconia (YSZ) coatings. The results of the model show a temperature reduction up to 45 K for YSZ of high reflectance (80%) compared to the YSZ of low reflectance (20%). The reflectivities of YSZ and metal blade affect the temperature distribution significantly. Additionally, the absorption and scattering coefficients of YSZ, the thickness of the coating, and the thermal conductivities of YSZ and metal blade affect the temperature distribution.
Journal Title
Journal of Materials Science
Volume
44
Issue/Number
13
Publication Date
1-1-2009
Document Type
Article
Language
English
First Page
3589
Last Page
3599
WOS Identifier
ISSN
0022-2461
Recommended Citation
"Modeling of thermal barrier coating temperature due to transmissive radiative heating" (2009). Faculty Bibliography 2000s. 1800.
https://stars.library.ucf.edu/facultybib2000/1800