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- W3084974913 abstract "Laminated cooling coupled by surface thermal barrier coating (TBC) has a large potential to provide the effective protection to components in next-generation gas turbines. However, the conjugate heat transfer characteristics of coupling system is reported rarely. In this work, the combined effects of internal element layout, coating thickness and cooling air amount on the metal and TBC surface temperatures were discussed. The conjugate heat transfer experiments were conducted under engine-similar hot-side Biot (Bi) numbers and mainstream-to-coolant temperature ratio, and thus, a low conductivity material was applied to simulate the actual TBC. Four TBC thicknesses could cause BiTBC/BiMetal = 1.5, 3.0, 4.5 and 6.0 in the actual operating range. The results revealed the TBCs with BiTBC/BiMetal ≥ 4.5 can generate a large thermal resistance to reduce the metal temperature and hence a 50% increment in metal overall cooling effectiveness. However, the dominated internal cooling was also isolated to cause an increase of exterior surface temperature of entire cooling scheme, and a significant reduction of cooling air effect. The surface temperature variations were affected by the internal layout, when adopting the TBCs with BiTBC/BiMetal ≤ 3.0. Relative to the coolant amount and TBC thickness, the sensitivities of cooling effectiveness with internal layout were non-significant." @default.
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- W3084974913 date "2020-11-01" @default.
- W3084974913 modified "2023-10-07" @default.
- W3084974913 title "Sensitivity analysis of internal layout and coating thickness to overall cooling performances of laminated cooling configurations with surface thermal barrier coatings" @default.
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- W3084974913 doi "https://doi.org/10.1016/j.applthermaleng.2020.116020" @default.
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