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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

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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