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Performance Prediction of a Converging Slot-Hole Film-Cooling Geometry

[+] Author Affiliations
J. E. Sargison

University of Tasmania, Tasmania, Australia

S. M. Guo, M. L. G. Oldfield

University of Oxford, Oxford, UK

G. D. Lock

University of Bath, Bath, UK

A. J. Rawlinson

Rolls Royce plc, Derby, UK

Paper No. GT2003-38144, pp. 63-70; 8 pages
  • ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference
  • Volume 5: Turbo Expo 2003, Parts A and B
  • Atlanta, Georgia, USA, June 16–19, 2003
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-3688-6 | eISBN: 0-7918-3671-1
  • Copyright © 2003 by ASME


Performance prediction techniques have been investigated for use as design tools for the novel console, or con verging s lothole , film cooling geometry. The performance of the console has been the subject of earlier publications that have demonstrated that this new film cooling hole improves both the heat transfer and aerodynamic performance of turbine vane and rotor blade cooling systems. Three prediction techniques are used and compared in this paper: theoretical models, correlations of experimental data, and two-dimensional Computational Fluid Dynamics. Published experimental measurements of adiabatic effectiveness for the console, and other typical cooling holes at low speed conditions and coolant to mainstream momentum flux ratios of 0.5, 1.1 and 1.5 were used in this analysis. The console results were compared with theoretical predictions of adiabatic effectiveness using a slot model, which was found to be an adequate approximation. Experimental performance data measured in a simple, low-speed apparatus was correlated and used to predict the performance of multiple rows of consoles in a nozzle guide vane at engine representative conditions. This was compared with published experimental data for engine representative conditions and it was found that the correlated low-speed data provided an adequate and simple prediction of the performance of the console in an engine representative film cooling design. Two-dimensional Computational Fluid Dynamics is another relatively rapid prediction tool that was used to predict low speed results.

Copyright © 2003 by ASME
Topics: Cooling , Geometry



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