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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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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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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 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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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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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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