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Analysis of Thermal Radiation Effects on Temperatures in Turbine Engine Thermal Barrier CoatingsThermal barrier coatings are important, and in some instances a necessity, for high temperature applications such as combustor liners, and turbine vanes and rotating blades for current and advanced turbine engines. Some of the insulating materials used for coatings, such as zirconia that currently has widespread use, are partially transparent to thermal radiation. A translucent coating permits energy to be transported internally by radiation, thereby increasing the total energy transfer and acting like an increase in thermal conductivity. This degrades the insulating ability of the coating. Because of the strong dependence of radiant emission on temperature, internal radiative transfer effects are increased as temperatures are raised. Hence evaluating the significance of internal radiation is of importance as temperatures are increased to obtain higher efficiencies in advanced engines.
Document ID
19980214835
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Siegel, Robert
(NASA Lewis Research Center Cleveland, OH United States)
Spuckler, Charles M.
(NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
August 18, 2013
Publication Date
May 1, 1998
Publication Information
Publication: Thermal Barrier Coating Workshop, 1997
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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