Time-Averaged and Time-Resolved Heat Flux Measurements on a Turbine Stator Blade Using Two-Layered Thin-Film Gauges

[+] Author and Article Information
V. Iliopoulou, R. Dénos, N. Billiard, T. Arts

von Karman Institute for Fluid Dynamics, Turbomachinery & Propulsion Department, Chaussée de Waterloo, 72 1640 Rhode Saint Genèse, Belgium

J. Turbomach 126(4), 570-577 (Dec 29, 2004) (8 pages) doi:10.1115/1.1791647 History: Received October 01, 2003; Revised March 01, 2004; Online December 29, 2004
Copyright © 2004 by ASME
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“Senflex” two-layered substrate thin-film gauge
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Linearization of the wall temperature evolution for a gauge submitted to a constant wall heat flux
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Calculated surface heat flux (10 800 W/m2 ) with the Crank-Nicholson scheme
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Aerothermal conditions of the jet
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Nusselt-Reynolds correlation obtained with single-layered thin-film gauge
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Surface temperature and heat flux for the time-averaged component
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Blade initial temperature distributions prior to blowdown from single and two-layered gauges
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Surface temperature, heat flux, and Nusselt distribution for the two-layered gauges during the blowdown
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Surface temperature, heat flux, and Nusselt distribution for the single-layered gauges during the blowdown
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Comparison of the repeatability of the Nusselt distribution between the single- and two-layered gauges
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Unsteady Nusselt number traces of two gauges of four different measurements for the two-layered gauges
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Min-max envelope, mean RMS, and correlation coefficient of the Nusselt number obtained with single and two-layered gauges
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Comparison of the unsteady Nusselt traces between the single- (in grey) and the two-layered gauges (in black)



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