Conjugated heat transfer analysis of a film cooling passage with different rib configurations
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 5 May 2015
Abstract
Purpose
The purpose of this paper is to analyze the effect of thermal conductivity on gas turbine blades, and to investigate the contribution of different rib configurations to the heat flux and the film cooling effectiveness.
Design/methodology/approach
The Renormalization Group (RNG) model with enhanced wall treatment was used for the turbulence modeling, and the SIMPLE algorithm was used to handle the pressure-velocity coupling.
Findings
A flame-shape distribution on the internal wall provides high heat flux compared to a hawk-shape distribution; the film cooling effectiveness on the external wall is enhanced for the lateral film cooling effectiveness by heat conduction and film cooling (convection); by comparing the square-rib and pin-rib configurations, the circular-rib configuration offers a higher film cooling effectiveness on the Aluminum wall.
Research limitations/implications
In the present research, the combination of internal cooling and external cooling is used to predict cooling effectiveness on film-cooled flat plate; two kinds of different plate materials are used to obtain the influence of the thermal conductivity. The successful computational method should give guidelines for potential CFD users in engineering sciences.
Practical implications
The results of the paper are of engineering interest where film cooling and ribbed surfaces are applied. The successful computational method will also serve as guidelines for potential users of CFD in design as well as research and development work.
Originality/value
In the present research, the combination of internal cooling and external cooling is used to predict cooling effectiveness on film-cooled flat plate; two kinds of different plate materials are used to obtain the influence of the thermal conductivity.
Keywords
Acknowledgements
The work of the conjugate heat transfer analysis was supported by the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China (Grant No. 51120165002), and the data processing of numerical simulations were supported by National Natural Science Foundation of China (Grant No. 51276093).
Citation
Wang, J., Gu, C. and Sunden, B.A. (2015), "Conjugated heat transfer analysis of a film cooling passage with different rib configurations", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 25 No. 4, pp. 841-860. https://doi.org/10.1108/HFF-04-2014-0110
Publisher
:Emerald Group Publishing Limited
Copyright © 2015, Emerald Group Publishing Limited