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Conjugated heat transfer analysis of a film cooling passage with different rib configurations

Wang, Jin; Gu, Chunwei and Sundén, Bengt LU (2015) In International Journal of Numerical Methods for Heat & Fluid Flow 25(4). p.841-860
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Heat transfer, Conduction, Convection, Film cooling, Material
in
International Journal of Numerical Methods for Heat & Fluid Flow
volume
25
issue
4
pages
841 - 860
publisher
Emerald Group Publishing Limited
external identifiers
  • wos:000355921000011
  • scopus:84929253629
ISSN
1758-6585
DOI
10.1108/HFF-04-2014-0110
language
English
LU publication?
yes
id
7945dc72-4365-499e-9f3c-882834b4c491 (old id 7613692)
date added to LUP
2015-07-21 13:26:13
date last changed
2017-10-29 03:20:51
@article{7945dc72-4365-499e-9f3c-882834b4c491,
  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.},
  author       = {Wang, Jin and Gu, Chunwei and Sundén, Bengt},
  issn         = {1758-6585},
  keyword      = {Heat transfer,Conduction,Convection,Film cooling,Material},
  language     = {eng},
  number       = {4},
  pages        = {841--860},
  publisher    = {Emerald Group Publishing Limited},
  series       = {International Journal of Numerical Methods for Heat & Fluid Flow},
  title        = {Conjugated heat transfer analysis of a film cooling passage with different rib configurations},
  url          = {http://dx.doi.org/10.1108/HFF-04-2014-0110},
  volume       = {25},
  year         = {2015},
}