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TECHNICAL PAPERS: Gas Turbine Heat Transfer

Effect of Squealer Geometry Arrangement on a Gas Turbine Blade Tip Heat Transfer

[+] Author and Article Information
Gm Salam Azad, Je-Chin Han

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

Ronald S. Bunker

GE R&D Center, Schenectady, NY 12301

C. Pang Lee

GE Aircraft Engines, Cincinnati, OH 45215

J. Heat Transfer 124(3), 452-459 (May 10, 2002) (8 pages) doi:10.1115/1.1471523 History: Received April 19, 2001; Revised January 29, 2002; Online May 10, 2002
Copyright © 2002 by ASME
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References

Bunker, R. S., and Bailey, J. C., 2000, “Blade Tip Heat Transfer and Flow With Chordwise Sealing Strips,” International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC), Honolulu, Hawaii, pp. 548–555.
Bunker, R. S., and Bailey, J. C., 2000, “An Experimental Study of Heat Transfer and Flow on a Gas Turbine Blade Tip with Various Tip Leakage Sealing Methods,” 4th ISHMT / ASME Heat and Mass Transfer Conference, India.
Heyes, F. J. G., Hodson, H. P., and Dailey, G. M., 1991, “The Effect of Blade Tip Geometry on the Tip Leakage Flow in Axial Turbine Cascades,” ASME Paper No. 91-GT-135.
Azad, G. S., Han, J. C., and Boyle, R. J., 2000, “Heat Transfer and Flow on the Squealer Tip of a Gas Turbine Blade,” ASME Paper No. 2000-GT-195.
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 Paper No. GT-0197.
Ameri, A. A., Steinthorsson, E., and Rigby, L. D., 1997, “Effect of Squealer Tip on Rotor Heat Transfer and Efficiency,” ASME Paper No. 97-GT-128.
Ameri, A. A., Steinthorsson, E., and Rigby, L. D., 1998, “Effects of Tip Clearance and Casing Recess on Heat Transfer and Stage Efficiency in Axial Turbines,” ASME Paper No. 98-GT-369.
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Bindon, J. P., and Morphus, G., 1988, “The Effect of Relative Motion, Blade Edge Radius and Gap Size on the Blade Tip Pressure Distribution in an Annular Turbine Cascade with Clearance,” ASME Paper No. 88-GT-256.
Bindon,  J. P., 1989, “The Measurement and Formation of Tip Clearance Loss,” ASME J. Turbomach., 111, pp. 258–263.
Moore,  J., Moore,  J. G., Henry,  G. S., and Chaudhury,  U., 1989, “Flow and Heat Transfer in Turbine Tip Gaps,” ASME J. Turbomach., 111, pp. 301–309.
Yaras, M. I., and Sjolander, S. A., 1991, “Effects of Simulated Rotation on Tip Leakage in a Planar Cascade of Turbine Blades, Part I-Tip Gap Flow,” ASME Paper No. 91-GT-127.
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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., New York, pp. 87–92.
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Azad, G. S., Han, J. C., Teng, S., and Boyle, R., 2000, “Heat Transfer and Pressure Distribution on a Gas Turbine Blade Tip,” ASME Paper No. 2000-GT-194.
Teng,  S., Han,  J. C., and Azad,  G. S., 2001, “Detailed Heat Transfer Coefficient Distributions on a Large-Scale Gas Turbine Blade Tip,” ASME J. Heat Transfer, 123, pp. 803–809.
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Figures

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A conceptual view of blade tip leakage flow
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Test section with 5-bladed cascade
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Removable squealer tip-various one-sided squealer geometry
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Removable squealer tip-various two-sided squealer geometry
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Pressure tap locations on shroud surface
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Heater arrangements on a sample heat transfer blade
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Shroud pressure distributions—one-sided squealer
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Shroud pressure distributions—two-sided squealer
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Local heat transfer coefficient distributions—one-sided squealer (Full color in on-line version of the journal)
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Local heat transfer coefficient distributions—two-sided squealer (Full color in on-line version of the journal)
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Averaged heat transfer coefficient—one-sided squealer
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Averaged heat transfer coefficient—two-sided squealer

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