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TECHNICAL PAPERS

Heat Transfer and Flow on the First-Stage Blade Tip of a Power Generation Gas Turbine: Part 2—Simulation Results

[+] Author and Article Information
A. A. Ameri

AYT Corporation, Brook Park, OH 44135

R. S. Bunker

General Electric Corp. R & D Center, Schenectady, NY 12309

J. Turbomach 122(2), 272-277 (Feb 01, 1999) (6 pages) doi:10.1115/1.555444 History: Received February 01, 1999
Copyright © 2000 by ASME
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References

Ameri,  Ali A., Steinthorsson,  E., and Rigby,  David L., 1998, “Effect of Squealer Tip on Rotor Heat Transfer and Efficiency,” ASME J. Turbomach., 120, pp. 753–759.
Metzger,  D. E., Bunker,  R. S., and Chyu,  M. K., 1989, “Cavity Heat Transfer on a Transverse Grooved Wall in a Narrow Channel,” ASME J. Heat Transfer, 111, pp. 73–79.
Ameri,  A. A., Steinthorsson,  E., and Rigby,  D. L., 1999, “Effects of Tip Clearance and Casing Recess on Heat Transfer and Stage Efficiency in Axial Turbines,” ASME J. Turbomach., 121, pp. 683–693.
Dunn,  M. G., Rae,  W. J., and Holt,  J. L., 1984, “Time Measurement and Analyses of Heat Flux Data in a Turbine Stage: Part I—Description of Experimental Apparatus and Data Analysis,” ASME J. Turbomach., 106, pp. 229–233.
Dunn,  M. G., Rae,  W. J., and Holt,  J. L., 1984, “Time Measurement and Analyses of Heat Flux Data in a Turbine Stage: Part II—Discussion of Results and Comparison With Predictions,” ASME J. Turbomach., 106, pp. 234–240.
Dunn,  M. G., and Kim,  J., 1992, “Time-Averaged Heat Flux and Surface Pressure Measurements on the Vanes and Blades of the SSME Fuel Side Turbine and Comparison With Prediction for a Two Stage Turbine,” ASME J. Turbomach., 116, pp. 14–22.
Ameri, Ali A., and Steinthorsson, E., 1995, “Prediction of Unshrouded Rotor Blade Tip Heat Transfer,” ASME Paper No. 95-GT-142.
Ameri, Ali A., and Steinthorsson, E., 1996, “Analysis of Gas Turbine Rotor Blade Tip and Shroud Heat Transfer,” ASME Paper No. 96-GT-189.
Steinthorsson, E., Liou, M. S., and Povinelli, L. A., 1993, “Development of an Explicit Multiblock/Multigrid Flow Solver for Viscous Flows in Complex Geometries,” Paper No. AIAA-93-2380.
Arnone. A., Liou, M. S., and Povinelli, L. A., 1991, “Multigrid Calculation of Three Dimensional Viscous Cascade Flows.” AIAA Paper No. 91-3238.
Rigby, David L., Ameri, Ali A., and Steinthorrson, E., 1996, “Internal Passage Heat Transfer Prediction Using Multiblock Grids and k–ω Turbulence Model,” ASME Paper No. 96-GT-188.
Rigby, D. L., Ameri, A. A., and Steinthorrson E., 1997, “Numerical Prediction of Heat Transfer in a Channel With Ribs and Bleed,” ASME Paper No. 97-GT-431.
Wilcox, D. C., 1994, Turbulence Modeling for CFD, DCW Industries, Inc., La Canada, CA.
Wilcox,  D. C., 1994, “Simulation of Transition With a Two-Equation Turbulence Model,” AIAA J., 32, No. 2, pp. 247–255.
Menter, Florian R., 1993, “Zonal Two-Equation k–ω Turbulence Models for Aerodynamic Flows,” Paper No. AIAA-93-2906.
Schlichting, H., Boundary Layer Theory, 7th ed., McGraw-Hill, New York, pp. 312–313.
Garg, Vijay K., and Rigby, David L., “Heat Transfer on a Film-Cooled Blade-Effect of Hole Physics,” ASME Paper No. 98-GT-404.

Figures

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Airfoil and shroud definition
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Overall grid using periodic flow assumption
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Model of complete passage: (a) overall geometry and grid; (b) close-up near leading edge
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Radiused edge tip and surface grid
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Blade pressure distribution data and computed pressure distribution using periodic conditions
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Near-tip pressure distribution data and computed pressure distribution using the complete passage and periodic cascade
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Blade tip surface pressure distribution with sharp edged tip and baseline clearance of 2.03 mm
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Blade tip surface pressure distribution with round edged tip and baseline clearance of 2.03 mm
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Heat transfer blade tip: (a) computational domain; (b) measuring area
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Sharp edged blade tip heat transfer coefficient (W/m2 /K) for clearance of 2.03 mm and Tu=5 percent: (a) measured; (b) calculated
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Radiused edge blade tip heat transfer coefficient (W/m2 /K) for clearance of 2.03 mm and Tu=5 percent: (a) measured; (b) calculated
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Flow streamlines over the blade tip for: (a) sharp edged blade; (b) radiused edge blade
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Magnitude of the velocity, V, at the midgap height of the blade tip for: (a) sharp edged blade; (b) radiused edge blade

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