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TECHNICAL PAPERS: Heat Transfer Combustion and Gas Turbine

Heat Transfer Coefficients and Film-Cooling Effectiveness on a Gas Turbine Blade Tip

[+] Author and Article Information
Jae Su Kwak, Je-Chin Han

Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843-3123

J. Heat Transfer 125(3), 494-502 (May 20, 2003) (9 pages) doi:10.1115/1.1565096 History: Received May 17, 2002; Revised December 27, 2002; Online May 20, 2003
Copyright © 2003 by ASME
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References

Han, J. C., Dutta, S., and Ekkad, S. V., 2000, Gas Turbine Heat Transfer and Cooling Technology, Taylor & Francis, New York.
Mayle, R. E., and Metzger, D. E., 1982, “Heat Transfer at the Tip of an Unshrouded Turbine Blade,” Proc. Seventh Int. Heat Transfer Conf., Hemisphere Pub., pp 87–92.
Metzger,  D. E., Bunker,  R. S., and Chyu,  M. K., 1989, “Cavity Heat Transfer on a Transverse Grooved Wall in a Narrow Flow Channel,” ASME J. Heat Transfer, 111, pp. 73–79.
Chyu,  M. K., Moon,  H. K., and Metzger,  D. E., 1989, “Heat Transfer in the Tip Region of Grooved Turbine Blades,” ASME J. Turbomach., 111, pp. 131–138.
Metzger,  D. E., Dunn,  M. G., and Hah,  C., 1991, “Turbine Tip and Shroud Heat Transfer,” ASME J. Turbomach., 113, pp. 502–507.
Bunker,  R. S., Baily,  J. C., and Ameri,  A. A., 2000, “Heat Transfer and Flow on the First Stage Blade Tip of a Power Generation Gas Turbine: Part 1: Experimental Results,” ASME J. Turbomach., 122, pp. 272–277.
Azad,  G. M. S., Han,  J. C., Teng,  S., and Boyle,  R., 2000, “Heat Transfer and Pressure Distributions on a Gas Turbine Blade Tip,” ASME J. Turbomach., 122, pp. 717–724.
Azad,  G. M. S., Han,  J. C., and Boyle,  R., 2000, “Heat Transfer and Pressure Distributions on the Squealer Tip of a Gas Turbine Blade,” ASME J. Turbomach., 122, pp. 725–732.
Teng,  S., Han,  J. C., and Azad,  G. M. S., 2001, “Derailed Heat Transfer Coefficient Distributions on a Large-Scale Gas Turbine Blade Tip,” ASME J. Heat Transfer, 123, pp. 803–809.
Dunn,  M. G., and Haldeman,  C. W., 2000, “Time-Averaged Heat Flux for a Recessed Tip, Lip, and Platform of a Transonic Turbine Blade,” ASME J. Turbomach., 122, pp. 692–697.
Ameri, A. A., and Steinthorsson, E., 1995, “Prediction of Unshrouded Rotor Blade Tip Heat Transfer,” ASME Paper 95-GT-142.
Ameri, A. A., and Steinthorsson, E., 1996, “Analysis of Gas Turbine Rotor Blade Tip and Shroud Heat Transfer,” ASME Paper 96-GT-189.
Ameri,  A. A., Steinthorsson,  E., and Rigby,  L. David, 1998, “Effect of Squealer Tip on Rotor Heat Transfer and Efficiency,” ASME J. Turbomach., 120, pp. 753–759.
Ameri,  A. A., Steinthorsson,  E., and Rigby,  L. David, 1999, “Effects of Tip Clearance and Casing Recess on Heat Transfer and Stage Efficiency in Axial Turbines,” ASME J. Turbomach., 121, pp. 683–693.
Ameri,  A. A., and Bunker,  R. S., 2000, “Heat Transfer and Flow on the First Stage Blade Tip of a Power Generation Gas Turbine: Part 2: Simulation Results,” ASME J. Turbomach., 122, pp. 272–277.
Kim,  Y. W., Downs,  J. P., Soechting,  F. O., Abdel-Messeh,  W., Steuber,  G. D., and Tanrikut,  S., 1995, “A Summary of the Cooled Turbine Blade Tip Heat Transfer and Film Effectiveness Investigations Performed by Dr. D. E. Metzger,” ASME J. Turbomach., 117, pp. 1–11.
Kim,  Y. W., and Metzger,  D. E., 1995, “Heat Transfer and Effectiveness on Film Cooled Turbine Blade Tip Model,” ASME J. Turbomach., 117, pp. 12–21.
Ekkad,  S. V., Zapata,  D., and Han,  J. C., 1995, “Heat Transfer Coefficients over a Flat Surface With Air and CO2 Injection through Compound Angle Holes Using a Transient Liquid Crystal Image Method,” ASME J. Turbomach., 119, pp. 580–586.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, pp. 3–8.
Foley, J. D., van Dam, A., Feiner, S. K., and Huyghes, J. F., 1990, Computer Graphics: Principles and Practice, Addison-Wesley Publishing Company, pp. 592.

Figures

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The schematic of a modern gas turbine with common cooling techniques
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The schematic of a blow-down facility
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Definition of blade tip clearance and the inflow and outflow angles
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Film-cooling measurement blade
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Geometry of film-cooling holes
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Pressure distributions on the shroud surface for C=1.5% and injection from tip holes only
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(a) The relation between hue and temperature; and (b) Initial temperature distribution for C=1.5%
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Heat transfer coefficient for C=1.5% and coolant injection from tip holes only
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Heat transfer coefficient for C=1.5% and coolant injection from both tip and pressure side holes
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Averaged heat transfer coefficient for C=1.5% and coolant injection from tip holes only
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Averaged heat transfer coefficient for C=1.5% and coolant injection from both tip and pressure side holes
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Averaged heat transfer coefficient for C=1.0% and coolant injection from both tip and pressure side holes
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Averaged heat transfer coefficient for C=2.5% and coolant injection from both tip and pressure side holes
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Film-cooling effectiveness for C=1.5% and coolant injection from tip holes only
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Film-cooling effectiveness for C=1.5% and coolant injection from both tip and pressure side holes
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Averaged film-cooling effectiveness for C=1.5% and coolant injection from tip holes only
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Averaged film-cooling effectiveness for C=1.5% and coolant injection from both tip and pressure side holes
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Averaged film-cooling effectiveness for C=1.0% and coolant injection from both tip and pressure side holes
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Averaged film-cooling effectiveness for C=2.5% and coolant injection from both tip and pressure side holes

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