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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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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