Three-dimensional contouring of the compressor and turbine endwalls in a gas turbine engine has been shown to be an effective method of reducing aerodynamic losses by mitigating the strength of the complex vortical structures generated at the endwall. Reductions in endwall heat transfer in the turbine have been also previously measured and reported in literature. In this study, computational fluid dynamics simulations of a turbine blade with and without nonaxisymmetric endwall contouring were compared to experimental measurements of the exit flowfield, endwall heat transfer, and endwall film-cooling. Secondary kinetic energy at the cascade exit was closely predicted with a simulation using the SST turbulence model. Endwall heat transfer was overpredicted in the passage for both the SST and realizable turbulence models, but heat transfer augmentation for a nonaxisymmetric contour relative to a flat endwall showed fair agreement to the experiment. Measured and predicted film-cooling results indicated that the nonaxisymmetric contouring limits the spread of film-cooling flow over the endwall depending on the interaction of the film with the contour geometry.
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October 2011
Research Papers
Computational Predictions of Heat Transfer and Film-Cooling for a Turbine Blade With Nonaxisymmetric Endwall Contouring
Stephen P. Lynch,
Stephen P. Lynch
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802
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Karen A. Thole,
Karen A. Thole
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802
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Atul Kohli,
Atul Kohli
Pratt & Whitney
, 400 Main Street, East Hartford, CT 06108
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Christopher Lehane
Christopher Lehane
Pratt & Whitney
, 400 Main Street, East Hartford, CT 06108
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Stephen P. Lynch
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802
Karen A. Thole
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802
Atul Kohli
Pratt & Whitney
, 400 Main Street, East Hartford, CT 06108
Christopher Lehane
Pratt & Whitney
, 400 Main Street, East Hartford, CT 06108J. Turbomach. Oct 2011, 133(4): 041003 (10 pages)
Published Online: April 19, 2011
Article history
Received:
June 28, 2010
Revised:
June 30, 2010
Online:
April 19, 2011
Published:
April 19, 2011
Citation
Lynch, S. P., Thole, K. A., Kohli, A., and Lehane, C. (April 19, 2011). "Computational Predictions of Heat Transfer and Film-Cooling for a Turbine Blade With Nonaxisymmetric Endwall Contouring." ASME. J. Turbomach. October 2011; 133(4): 041003. https://doi.org/10.1115/1.4002951
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