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TECHNICAL PAPERS

Effects of Tip Geometry and Tip Clearance on the Mass/Heat Transfer From a Large-Scale Gas Turbine Blade

[+] Author and Article Information
M. Papa, F. Gori

Department of Mechanical Engineering, University of Rome ‘Tor Vergata,’ Rome, Italy

R. J. Goldstein

Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455

J. Turbomach 125(1), 90-96 (Jan 23, 2003) (7 pages) doi:10.1115/1.1529190 History: Received October 18, 2001; Online January 23, 2003
Copyright © 2003 by ASME
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References

Bunker, R. S., 2001, “A Review of Turbine Blade Tip Heat Transfer,” Heat Transfer in Gas Turbine Systems, R. J. Goldstein, ed., Annals of the New York Academy of Sciences, New York, NY, Vol. 934, pp. 64–79.
Bunker, R. S., Bailey, J. C., and Ameri, A. A., 1999, “Heat Transfer and Flow on the First Stage Blade Tip of a Power Generation Gas Turbine—Part 1: Experimental Results,” ASME 99-GT-169.
Ameri, A. A., and Bunker, R. S., 1999, “Heat transfer and Flow on the First Stage Blade Tip of a Power Generation Gas Turbine—Part 2: Simulation Results,” ASME 99-GT-283.
Azad, G., Han, J.-C., and Teng, S., 2000, “Heat Transfer and Pressure Distribution on a Gas Turbine Blade Tip,” ASME 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.
Azad, G., Han, J.-C., and Boyle, R. J., 2000, “Heat Transfer and Flow on the Squealer Tip of a Gas Turbine Blade,” ASME 2000-GT-195.
Ameri, A. A., Steinthorsson, E., and Rigby, D. L., 1997, “Effect of Squealer Tip on Rotor Heat Transfer and Efficiency,” ASME 97-GT-128.
Jin, P., and Goldstein R. J., 2002, “Local Mass/Heat Transfer on a Turbine Blade Tip,” ISROMAC-9, Honolulu, HI, February 10–14.
Goldstein,  R. J., and Cho,  H. H., 1995, “A Review of Mass Transfer Measurements Using Naphthalene Sublimation,” Exp. Therm. Fluid Sci., 10, pp. 416–434.
Sjölander,  S. A., and Amrud,  K. K., 1987, “Effects of Tip Clearance on Blade Loading in a Planar Cascade of Turbine Blade,” ASME J. Turbomach., 109, pp. 237–244.

Figures

Grahic Jump Location
Squealer tip assembly—(a) exploded view, (b) assembled view
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Top view and cross-sectional view of blade tip Assemblies—(a) squealer tip, (b) winglet-squealer tip
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Contour plot of Sherwood number distribution for the squealer tip
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3-D plot of Sherwood number distribution for the squealer tip
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Contour plot of Sherwood number distribution for the winglet-squealer tip
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3-D plot of Sherwood number distribution for the winglet-squealer tip
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Average Sherwood number as a function of tip clearance
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Flow visualization for blade tips (τ/C=3.6%)

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