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TECHNICAL PAPERS

High Free-Steam Turbulence Effects on Endwall Heat Transfer for a Gas Turbine Stator Vane

[+] Author and Article Information
R. W. Radomsky, K. A. Thole

Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060

J. Turbomach 122(4), 699-708 (Feb 01, 2000) (10 pages) doi:10.1115/1.1312807 History: Received February 01, 2000
Copyright © 2000 by ASME
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References

Figures

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Schematic of corner test section containing the stator vane cascade
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(a) Comparison of measured and predicted normalized mean streamwise and pitchwise velocity profiles at one-third chord upstream of the vane stagnation; (b) normalized rms levels of all three velocity components and integral length scale measured at one-third chord upstream of the vane stagnation point
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(a) Comparison of measured streamwise boundary layer profiles at low and high free-stream turbulence levels plotted in terms of free-stream parameters; (b) comparison of measured streamwise boundary layer profiles at low and high free-stream turbulence levels plotted in terms of inner wall scaling parameters
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(a) The rms levels of streamwise velocity fluctuations in the boundary layer in terms of inner wall scaling parameters; (b) rms levels of spanwise velocity fluctuations in the boundary layer in terms of inner wall scaling parameters
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Leading edge horseshoe vortex with contours of streamwise velocity at: (a) Tu=0.6 percent10, and (b) Tu=19.5 percent
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Contour levels of: (a) streamwise, (b) pitchwise, and (c) spanwise turbulence components at Tu=19.5 percent
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Contour levels of normalized turbulent kinetic energy at: (a) Tu=0.6 percent, and (b) Tu=19.5 percent
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Contour levels of: (a) normalized Reynolds shear stress, and (b) correlation coefficients at high free-stream turbulence
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Probability density functions of: (a) streamwise, and (b) spanwise velocity components in the leading edge horseshoe vortex at a turbulence level of 0.6 percent
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Probability density functions of: (a) streamwise, and (b) spanwise velocity components in the leading edge horseshoe vortex at a turbulence level of 19.5 percent
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Contours of Stanton number (St×105) on the vane endwall at: (a) Tu=0.6 percent10, and (b) Tu=19.5 percent; (c) contours of Stanton number augmentation (St/St0) as a result of free-stream turbulence at 19.5 percent
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Comparison of Tu=0.6 and 19.5 percent for: (a) Stanton numbers approaching the vane stagnation point, and (b) Stanton numbers that have been pitchwise averaged at a given axial location

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