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Conjugate Heat Transfer Characteristics in a Highly Thermally Loaded Film Cooling Configuration with TBC in Syngas

by Jing Ren *, Xueying Li and Hongde Jiang
Institute of Gas Turbine, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Aerospace 2019, 6(2), 16; https://doi.org/10.3390/aerospace6020016
Received: 12 November 2018 / Revised: 29 January 2019 / Accepted: 30 January 2019 / Published: 13 February 2019
(This article belongs to the Collection Cooling/Heat Transfer)
Future power equipment tends to take hydrogen or middle/low heat-value syngas as fuel for low emission. The heat transfer of a film-cooled turbine blade shall be influenced more by radiation. Its characteristic of conjugate heat transfer is studied experimentally and numerically in the paper by considering radiation heat transfer, multicomposition gas, and thermal barrier coating (TBC). The Weighted Sum of Gray Gases Spectral Model and the Discrete Transfer Model are utilized to solve the radiative heat transfer in the multicomposition field, while validated against the experimental data for the studied cases. It is shown that the plate temperature increases significantly when considering the radiation and the temperature gradient of the film-cooled plate becomes less significant. It is also shown that increasing percentage of steam in gas composition results in increased temperature on the film-cooled plate. The normalized temperature of the film-cooled plate decreases about 0.02, as the total percentage of steam in hot gas increases 7%. As for the TBC effect, it can smooth out the temperature distribution and insulate the heat to a greater extent when the radiative heat transfer becomes significant. View Full-Text
Keywords: film cooling; conjugate heat transfer; radiation; syngas; TBC film cooling; conjugate heat transfer; radiation; syngas; TBC
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MDPI and ACS Style

Ren, J.; Li, X.; Jiang, H. Conjugate Heat Transfer Characteristics in a Highly Thermally Loaded Film Cooling Configuration with TBC in Syngas. Aerospace 2019, 6, 16.

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