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Conjugate Heat Transfer Investigation of Rib-Roughened Cooling Channels

[+] Author Affiliations
Francesco Agostini, Tony Arts

von Karman Institute for Fluid Dynamics, Rhode Saint Genèse, Belgium

Paper No. GT2005-68166, pp. 239-247; 9 pages
doi:10.1115/GT2005-68166
From:
  • ASME Turbo Expo 2005: Power for Land, Sea, and Air
  • Volume 3: Turbo Expo 2005, Parts A and B
  • Reno, Nevada, USA, June 6–9, 2005
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4726-8 | eISBN: 0-7918-3754-8
  • Copyright © 2005 by ASME

abstract

The present paper deals with an experimental investigation on the conjugate heat transfer in a straight. non-rotating rib-roughened cooling channel. The geometry and flow Reynolds number are representative of those encountered in a modern gas turbine. The hot wall, including the rib, surface temperature distribution is measured by means of an Infra-Red imaging system. The conduction pattern through the wall thickness is calculated by means of the commercial code Fluent® . This combination allows the determination of the real local wall heat flux and enhancement factor in order to investigate the effect of the conduction-convection coupling. The results are compared with those obtained from a more classical, purely convective experiment, putting in evidence the real contribution of the ribs in the heat transfer pattern. A detailed uncertainty analysis, taking into account the combination of the experimental and numerical approaches, supports the results. In addition to a better understanding of the rib effect in the heat transfer pattern, the present data also complement an already well documented test case for numerical analysis validation.

Copyright © 2005 by ASME

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