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TECHNICAL PAPERS: Gas Turbines: Combustion and Fuel

An Experimental Study of Surface Temperature Distribution on Effusion-Cooled Plates

[+] Author and Article Information
K. M. Bernhard Gustafsson, T. Gunnar Johansson

Department of Thermo and Fluid Dynamics, Chalmers University of Technology, SE-412 96, Göteborg, Sweden

J. Eng. Gas Turbines Power 123(2), 308-316 (Jan 23, 2001) (9 pages) doi:10.1115/1.1364496 History: Received May 01, 2000; Revised January 23, 2001
Copyright © 2001 by ASME
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References

Gustafsson, K. M. B, 1998, “An Experimental Study of the Surface Temperature of an Effusion-Cooled Plate using Infrared Thermography,” thesis for the degree of Licentiate in Engineering, No. 98/9, Department of Thermo and Fluid Dynamics, Chalmers University of Technology, Göteborg, Sweden.
Martiny, M., Schulz, A., and Wittig, S., 1995, “Full-Coverage Film Cooling Investigations: Adiabatic Wall Temperatures and Flow Visualization,” ASME International Mechanical Engineering Congress & Exposition San Francisco—November 12–17, Vol. 95-WA/HT-4, ASME, New York.
Cho,  H. H., and Goldstein,  R. J., 1995, “Heat (Mass) Transfer and Film Cooling Effectiveness with Injection through Discrete Holes: Part i—Within Holes and on the Back Surface,” ASME J. Turbomach., 117, pp. 440–450.
Cho,  H. H., and Goldstein,  R. J., 1995, “Heat (Mass) Transfer and Film Cooling Effectiveness with Injection through Discrete Holes: Part ii—On the Exposed Surface,” ASME J. Turbomach., 117, pp. 451–460.
Foster,  N. W., and Lampard,  D., 1980, “The Flow and Film Cooling Effectiveness Following Injection through a Row of Holes,” J. Eng. Power, 102, pp. 584–588.
Friedrichs,  S., Hodson,  H. P., and Dawes,  W. N., 1996, “Distribution of Film-Cooling Effectiveness on a Turbine Endwall Measured using the Ammonia and Diazo Technique,” ASME J. Turbomach., 118 No. (4), pp. 613–621.
Gritsch,  M., Schulz,  A., and Wittig,  S., 1998, “Adiabatic Wall Effectiveness Measurements of Film-Cooling Holes with Expanded Exits,” ASME J. Turbomach., 120 No. 3, pp. 549–556.
van Treuren,  K. W., Wang,  Z., Ireland,  P. T., and Jones,  T. V., 1994, “Detailed Measurements of Local Heat Transfer Coefficient and Adiabatic Wall Temperature Beneath an Array of Impinging Jets,” ASME J. Turbomach., 116, pp. 369–374.
Salcudean,  M., Gartshore,  I., Zhang,  K., and McLean,  I., 1994, “An Experimental Study of Film Cooling Effectiveness near the Leading Edge of a Turbine Blade,” ASME J. Turbomach., 116, pp. 71–79.
Ligrani,  P. M., and Ramsey,  A. E., 1997, “Film Cooling from Spanwise-Oriented Holes in Two Staggered Rows,” ASME J. Turbomach., 119, pp. 562–567.
Eckert,  E. R. G., 1984, “Analysis of Film Cooling and Full Coverage Film Cooling of Gas Turbine Blades,” ASME J. Eng. Gas Turbines Power, 106 No. 1, pp. 206–213.
Leontiev,  A. I., 1999, “Heat and Mass Transfer Problems for Film Cooling,” ASME J. Heat Transfer, 121 No. 3, pp. 509–527.
Bazdidi-Tehrani,  F., and Andrews,  G. E., 1994, “Full-Coverage Discrete Hole Film Cooling: Investigation of the Effect of Variable Density Ratio,” ASME J. Eng. Gas Turbines Power, 116, pp. 587–596.
Goldstein,  R. J., and Stone,  L. D., 1997, “Row-of-Hole Film Cooling of Curved Walls at Low Injection Angles,” ASME J. Turbomach., 119 No. 3, pp. 574–579.

Figures

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The wind tunnel. (A) Test section, (B) IR camera, (C) vortex flow-meter, (D) compact heat exchanger, (E) cold air loop fan, (F) IR camera system controller, (G) heater and controller, (H) thermocouple measurement instrument, (I) hot air loop fan, (J) temperature sensor [Pt-100], and (K) screens
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Cross section of the plenum chamber and wind tunnel
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An idealized case used for the dimensional analysis
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The effect of Rec for a teflon plate with T0/Tc=1.7,δx/d=3, and n=156
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The effect of δx/d for a teflon plate with α=20 deg and T0/Tc=1.56–1.58
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The effect of λsc for a plate with T0/Tc=1.7,U0/Uc=100,δx/d=6, and α=30 deg
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The effect of α for a teflon plate with T0/Tc=1.58,U0/Uc=100, and δx/d=6
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The effect of T0/Tc for a teflon plate where U0/Uc=140,Rec=100,δx/d=12, α=20 deg, and n=44
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Closeups of the first rows of holes for teflon plates with T0/Tc=1.78,Rec=150,δx/d=6, α=30 deg. A variation in U0/Uc is made, from the top U0/Uc={91,60,34}. The number of injection holes n is 80.
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The effect of different velocity ratios U0/Uc is shown in thermographs of teflon plates where T0/Tc=1.78,Rec=150,δx/d=6, α=30 deg, and n=80. A variation in U0/Uc is made, from top U0/Uc={91,60,34}.
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The effect of different velocity ratios U0/Uc is shown in thermographs of teflon plates where T0/Tc=1.7,Rec=90,δx/d=3, α=20 deg, and n=156. A variation in U0/Uc is made, from top U0/Uc={157,102,58}.
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The effect of different U0/Uc is shown in thermographs of teflon plates where T0/Tc=1.7,Rec=92,δx/d=6, α=20 deg, and n=80. A variation in U0/Uc is made, from top U0/Uc={151,100,56}.
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The effect of different velocity ratios U0/Uc is shown in thermographs of teflon plates where T0/Tc=1.7,Rec=100,δx/d=12, α=20 deg, and n=44. A variation in U0/Uc is made, from top U0/Uc={140,90,51}.
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The effect of different Reynolds numbers Rec is shown in thermographs of teflon plates with T0/Tc=1.53–1.59
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The effect of different Reynolds numbers Rec is shown in thermographs of teflon plates where T0/Tc=1.7
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The effect of different streamwise hole spacings δx/d is shown in thermographs of teflon plates where α=20 deg and T0/Tc=1.56–1.58
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The effect of different heat conductivity ratios λsc is shown in thermographs of plates with λsc=1700 and n=84 for the steel plate at the top and with λsc=19 and n=80 for the teflon plate at the bottom; furthermore, δx/d=6, α=30 deg, U0/Uc=100, and T0/Tc=1.7
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The effect of different injection angles α is shown in thermographs of teflon plates where U0/Uc=100,T0/Tc=1.58, and δx/d=6
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The maximum spanwise temperature ratio Tw/Tc versus T0/Tc for three teflon plates at x/d=20. ○: U0/Uc=140,Rec=110,δx/d=12, and α=20 deg;  * : U0/Uc=59,Rec=100,δx/d=6, and α=30 deg; ▿: U0/Uc=58,Rec=90,δx/d=3, and α=20 deg.
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The film cooling effectiveness ηwmax based on maximum spanwise temperature ratio Tw/Tc versus T0/Tc. Teflon plate with Rec=148,δx/d=3, α=30 deg, and n=156.
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The effect of U0/Uc for a teflon plate where T0/Tc=1.7,Rec=90,δx/d=3, α=20 deg, and n=156
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The effect of U0/Uc for a teflon plate where T0/Tc=1.7,Rec=92,δx/d=6, α=20 deg, and n=80
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The effect of U0/Uc for a teflon plate where T0/Tc=1.7,Rec=110,δx/d=12, α=20 deg, and n=44
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The effect of Rec for a teflon plate with T0/Tc=1.53–1.59

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