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Heat Transfer Research
Facteur d'impact: 0.404 Facteur d'impact sur 5 ans: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v36.i12.140
pages 114-131

The Computation and Experimental Approach to Analysis of Service Life and Temperature of Gas-Turbine Blade Protective Coatings

P. G. Krukovskiy
Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, Kiev, Ukraine
K. A. Tadlya
Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, Kiev, Ukraine

RÉSUMÉ

The improved physical and mathematical models of mass transfer processes in metal MCrAlY coatings which describe aluminum oxidation and diffusion processes in the coating-blade alloy system are presented. The computation and experimental approach to estimation of service life and average local operating temperatures of coatings based on the proposed model and solution of diffusion inverse problems by the data of experimental measurements of aluminum-oxide film thickness and aluminum concentrations in the coating and base alloy is considered. The comparison of calculated and experimental distributions of aluminum concentrations in the coating and base alloy, as well as the results of determination of the coating service life and testing of the technique for determination of average local operating temperatures of coatings are presented.


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