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Heat Transfer Enhancement by Impingement Cooling in a Combustor Liner Heat Shield

[+] Author Affiliations
Diane Lauffer, Bernhard Weigand, Jens von Wolfersdorf

Universität Stuttgart, Stuttgart, Germany

Stefan Dahlke, Roland Liebe

Siemens Power Generation, Mülheim an der Ruhr, Germany

Paper No. GT2007-27908, pp. 1383-1391; 9 pages
doi:10.1115/GT2007-27908
From:
  • ASME Turbo Expo 2007: Power for Land, Sea, and Air
  • Volume 4: Turbo Expo 2007, Parts A and B
  • Montreal, Canada, May 14–17, 2007
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4793-4 | eISBN: 0-7918-3796-3
  • Copyright © 2007 by ASME

abstract

As part of an industrial gas turbine research program, the present study provides the results of a basic investigation of the heat transfer in an impingement cooled combustor heat shield. Because of the complexity and the irregularity of the impingement pattern of the heat shield, standard correlations for regular impingement fields are insufficient and the investigation of local heat transfer enhancement is required therefore. The model to represent a simplified heat shield is made out of perspex, and heat transfer experiments are performed using a transient liquid crystal method. The local air temperature is measured at several positions within the model. The distributions of the Nusselt number on the impingement target plate as well as on the side rims and along the central bolt recess of the heat shield are shown for different impingement Reynolds numbers. The results are compared with respect to the local and overall heat transfer.

Copyright © 2007 by ASME

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