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TECHNICAL PAPERS

Perspectives in Modeling Film Cooling of Turbine Blades by Transcending Conventional Two-Equation Turbulence Models

[+] Author and Article Information
A. Azzi

Faculty of Mechanical Engineering, University of Oran, USTO, Oran 31000, Algeria

D. Lakehal

Institute of Energy Technology, Swiss Federal Institute of Technology Zurich, ETH-Zentrum/CLT, CH-8092, Zurich, Switzerland

J. Turbomach 124(3), 472-484 (Jul 10, 2002) (13 pages) doi:10.1115/1.1485294 History: Received September 01, 2001; Revised April 15, 2002; Online July 10, 2002
Copyright © 2002 by ASME
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References

Figures

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Normalized profiles in developed channel flow at Reτ=211; (left) turbulent kinetic energy k+; (right) dissipation rate ε+
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Analytical correlation versus DNS data for near-wall turbulence anisotropy; (left) w′2/v′2, (right) v′2/k=f(Ry,y+)
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Normalized profiles in developed channel flow at Reτ=211; (left) turbulent kinetic energy k+; (right) shear stress uv+
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Normalized rms-velocity profiles in developed channel flow at Reτ=211; Results obtained with various turbulence models
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Details of the computational grid near the injection hole
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Contours of wall film-cooling effectiveness for (upper) M=0.5 and (lower) M=1.0. Calculations with various turbulence models.
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Streamlines at the midplane (Z/D=0) for M=0.5 and 1.0. Calculations with the TLV and TLVA models.
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Formation of the secondary vortices at cross-flow location X/D=4. Calculations with various turbulence models for M=0.5.
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Near-injection turbulence intensity Tu contours (normalized by U) in the vertical plane (Z/D=0). Calculations with various turbulence models and M=0.5. Experimental data (lowest panel) of Pietrzyk et al. 12.
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Near-injection uv shear-stress contours (normalized by U2) in the vertical plane (Z/D=0). Calculations with various turbulence models and M=0.5. Experimental data (lowest panel) of Pietrzyk et al. 12.
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Comparison of η at the centerline (upper two panels) and the laterally averaged film-cooling effectiveness 〈η〉 (lower panels)
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Distributions of the spanwise film-cooling effectiveness for M=0.5 at four cross-flow locations
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Distributions of the spanwise film-cooling effectiveness for M=1.0 at two cross-flow locations

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