Preprint Article Version 1 This version is not peer-reviewed

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

Version 1 : Received: 12 November 2018 / Approved: 15 November 2018 / Online: 15 November 2018 (05:30:44 CET)

A peer-reviewed article of this Preprint also exists.

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. 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.

Journal reference: Aerospace 2019, 6, 16
DOI: 10.3390/aerospace6020016

Abstract

The future power equipment tends to take hydrogen or middle/low heat-value syngas as fuel for low emission. The heat transfer of 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, multi-composition gas and TBC. The Weighted Sum of Gray Gases spectral model and Discrete Transfer Model are utilized to solve the radiative heat transfer in the multi-composition 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 larger. 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 per 7%. As for the TBC effect, it can smooth out the the temperature distribution and insulate the heat to a greater extent when the radiative heat transfer becomes significant.

Subject Areas

film cooling; conjugate heat transfer; radiation; syngas; TBC

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