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TECHNICAL PAPERS

Heat Transfer Coefficients on the Squealer Tip and Near-Tip Regions of a Gas Turbine Blade With Single or Double Squealer

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

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

C. Pang Lee

GE Aircraft Engines, 1 Neumann Way, MD A406, Cincinnati, OH 45215-6301

Ronald S. Bunker

GE Corporate R&D, K-1, ES-119, P.O. Box 8, Schenectady, NY 12301

Robert Boyle, Raymond Gaugler

NASA Research Center, 21000 Brookpark Road, MS 5-11, Cleveland, OH 44135

J. Turbomach 125(4), 778-787 (Dec 01, 2003) (10 pages) doi:10.1115/1.1626684 History: Received December 01, 2002; Revised March 01, 2003; Online December 01, 2003
Copyright © 2003 by ASME
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References

Azad,  GM 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,  GM 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.
Azad,  GM S., Han,  J. C., Bunker,  R. S., and Lee,  C. P., 2002, “Effect of Squealer Geometry Arrangement on a Gas Turbine Blade Tip Heat Transfer,” ASME J. Heat Transfer, 124, pp. 452–459.
Kwak,  J. S., and Han,  J. C., 2003, “Heat Transfer Coefficient on a Gas Turbine Blade Tip and Near Tip Regions,” J. Thermophys. Heat Transfer, 17, pp. 297–303.
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Figures

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Schematic of blow down facility
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Definition of blade tip and shroud
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Heat transfer measurement blade
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Geometry of squealer tips
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(a) The relation between hue and temperature (b) Initial temperature on the tip for the squealer along suction side and C=1.5% case
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Heat transfer coefficient on the tip, (a) squealer along CL; (b) squealer along PS; (c) squealer along SS; (d) squealer along PS+SS (Kwak and Han 5); (e) squealer along CL+PS; (f ) squealer along CL+SS; (g) plane tip (Kwak and Han 4)
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The conceptual view of the flow leakage near the tip region
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Heat transfer coefficient on the shroud, (a) squealer along CL; (b) squealer along PS; (c) squealer along SS; (d) squealer along PS+SS (Kwak and Han 5); (e) squealer along CL+PS; (f ) squealer along CL+SS; (g) plane tip (Kwak and Han 4)
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Heat transfer coefficient on the near tip region of the pressure side, (a) squealer along CL; (b) squealer along PS; (c) squealer along SS; (d) squealer along PS+SS (Kwak and Han 5); (e) squealer along CL+PS; (f ) squealer along CL+SS; (g) plane tip (Kwak and Han 4)
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Heat transfer coefficient on the near tip region of the suction side, (a) squealer along CL; (b) squealer along PS; (c) squealer along SS; (d) squealer along PS+SS (Kwak and Han 5); (e) squealer along CL+PS; (f ) squealer along CL+SS; (g) plane tip (Kwak and Han 4)
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Averaged heat transfer coefficient on the tip
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Averaged heat transfer coefficient on the shroud, the pressure side and the suction side

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