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TECHNICAL PAPERS

Unsteady Turbine Blade Wake Characteristics

[+] Author and Article Information
Claus H. Sieverding, Davide Ottolia, Carlo Bagnera, Andrea Comadoro, J.-F. Brouckaert

von Karman Institute for Fluid Dynamics, Chaussée de Waterloo 72, B-1640 Rhode-Saint-Genèse, Belgium

Jean-Michel Desse

ONERA, Institut de Mécanique des Fluides de Lille, Boulevard Paul Painlevé 5, F-59045 Lille Cedex, France

J. Turbomach 126(4), 551-559 (Dec 29, 2004) (9 pages) doi:10.1115/1.1737783 History: Received December 01, 2002; Revised March 01, 2003; Online December 29, 2004
Copyright © 2004 by ASME
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References

Han,  L. S., and Cox,  W. R., 1983, “A Visual Study of Turbine Blade Pressure Side Boundary Layer,” ASME J. Eng. Gas Turbines Power, 105, pp. 47–52.
Lawaczeck, O., and Heineman, J., 1975, “von Karman Vortex Street in the Wake of Subsonic and Transonic Blades,” Unsteady Phenomena in Turbomachinery, Paper 28, AGARD-CP-177.
Heinemann, J., and Bütefisch, K. A., 1977, “Determination of the Vortex Shedding Frequency of Cascades With Different Trailing Edge Thicknesses,” Paper 11, AGARD-CP-227.
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Cicatelli, G., and Sieverding, C. H., 1996, “A Review of the Research on Unsteady Turbine Blade Wake Characteristics,” Loss Mechanisms and Unsteady Flows in Turbomachines, Paper 6, AGARD-CP-571.
Cicatelli,  G., and Sieverding,  C. H., 1997, “The Effect of Vortex Shedding on the Unsteady Pressure Distribution Around the Trailing Edge of a Turbine Blade,” ASME J. Turbomach., 119, pp. 810–819.
Desse,  J. M., 1998, “Effect of Time Varying Wake Characteristics Behind Flat Plates,” AIAA J., 36(11), pp. 2036–2043.
Sieverding, C. H., Cicatelli, G., Desse, J. M., Meinke, M., and Zunino, P., 1999, “Experimental and Numerical Investigation of Time Varying Wakes Behind Turbine Blades,” Notes on Numerical Fluid Mechanics, 67 , Vieweg, Braunschweig/Wiesbaden.
Sieverding,  C. H., Richard,  H., and Desse,  J.-M., 2003, “Turbine Blade Trailing Edge Flow Characteristics at High Subsonic Outlet Mach Number,” ASME J. Turbomach., 125, pp. 298–309.
Ubaldi, M., and Zunino, P., 1999, “An Experimental Study of the Unsteady Characteristics of the Turbulent Wake of a Turbine Blade,” 4th International Symposium on Engineering Turbulence Modelling and Measurements, Ajaccio.
Ubaldi, M., Zunino, P., Cattanei, A., and Campora, U., 1999, “Effect of Trailing Edge Cooling on Turbine Wake Unsteady Flow Characteristics,” 4th European Tubomachinery Conference, London.
Zunino, P., Ubaldi, M., Cattanei, A., and Campora, U., 2001, “An Experimental Investigation for the Interaction Between Trailing Edge Coolant Jet and Wake,” 3rd European Tubomachinery Conference, Firenze, Italy, pp. 283–294.
Raffel, M., Höfer, F., Kost, C., and Kompenhans, J., 1996, “Experimental Aspects of PIV Measurements of Transonic Flow Fields at a Trailing Edge Model of a Turbine Blade,” 8th International Symposium on Application of Laser Techniques to Fluid Mechanics, Lisbon, Portugal.
Carscallen,  W. E., Currie,  T. C., Hogg,  S. I., and Gostelow,  J. P., 1998, “Measurement and Computation of Energy Separation in Vortical Wake Flow of a Turbine Blade,” ASME J. Turbomach., 121, pp. 703–708.
Buttsworth,  D., and Jones,  T. V., 1998, “A Fast Response Total Temperature Probe for Unsteady Compressible Flows,” ASME J. Eng. Gas Turbines Power, 120, pp. 694–701.
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Figures

Grahic Jump Location
Evolution of vortex density minima with increasing downstream distance; (top) holographic interferometry, (bottom) white light differential interferometry
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Lateral spreading of vortex minima with increasing downstream distance; (top) holographic interferometry, (bottom) white light differential interferometry
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Multihead fork probe for mean and time accurate total pressure and temperature measurements
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Steady-state total pressure, temperature, and entropy distribution through wake at trailing edge distance x/D=2.5
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(top) Phase-lock averaged pressure amplitudes versus number of windows on wake centerline (y/D=0) and at y/D=0.66 (bottom), acceptance rate
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Wake total pressure and temperature fluctuations through wake at x/D=2.5
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Variation of phase-lock averaged pressure amplitude through wake
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Example of white light differential interferogram with fringes set parallel to wake centerline and corresponding gas density field, phase angle φ∼0 deg
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Example of holographic interferogram, phase angle φ∼90 deg
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Smoke visualizations for different instances over one vortex shedding cycle at outlet Mach number M2,is=0.79
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Boundary layer profiles at blade trailing edge
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Blade Mach number distribution for M2,is=0.79
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Photograph of test section

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