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TECHNICAL PAPERS

A Numerical Investigation on the Influence of Lateral Boundaries in Linear Vibrating Cascades

[+] Author and Article Information
Roque Corral

Industria de TurboPropulsores S.A., 28830 Madrid, Spaine-mail: Roque.Corral@itp.es

Fernando Gisbert

School of Aeronautics, UPM, 28040 Madrid, Spain

J. Turbomach 125(3), 433-441 (Aug 27, 2003) (9 pages) doi:10.1115/1.1575255 History: Received June 11, 2001; Online August 27, 2003
Copyright © 2003 by ASME
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References

Figures

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Typical hybrid-cell grid and associated dual mesh
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Scheme and nomenclature of a linear flat plate cascade with five passages
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Comparison with LINSUB (solid line) of the unsteady pressure amplitude (top) and phase (bottom) obtained with the current method for the baseline case (M=0.5,St=5,s/c=0.5, θ=30 deg, σ=0 deg) with two different grids.
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Comparison against LINSUB (solid line) of the unsteady pressure amplitude in the influence coefficient (top) and traveling-wave (bottom) forms of a cascade of five flat plates vibrating in a blade alone mode computed using periodic (×) and inviscid wall (○) boundary conditions in the lateral walls
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Comparison against LINSUB (solid line) of the unsteady pressure amplitude expressed in form of traveling-waves of a cascade of nine flat plates vibrating in blade alone mode computed using periodic (×) and inviscid wall (○) boundary conditions in the lateral walls
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Nondimensional work-per-cycle obtained from LINSUB (○) and from a cascade of nine flat plates vibrating in blade alone mode computed using solid lateral walls
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Comparison with LINSUB (solid line) of the unsteady pressure amplitude (top) and phase (bottom) obtained with the current method for the baseline case (M=0.5,St=5,s/c=0.5, θ=30 deg) and two different interblade phase angles (σ=0 deg and σ=π)
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Comparison with LINSUB (○) of the influence coefficients obtained with the current method (×) for the baseline case (M=0.5,St=5,s/c=0.5, θ=30 deg) and N=21
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Comparison with LINSUB (solid line) of the unsteady pressure amplitude (top) and phase (bottom) obtained with the current method using nine blades (M=0.5,St=1,s/c=0.5, θ=30 deg, σ=0 deg)
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Influence coefficients obtained with the LINSUB with nine blades (N=9) for the baseline case (M=0.5,s/c=0.5, θ=30 deg) and two reduced frequencies St=1 and St=5
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Comparison against LINSUB (solid line) of the unsteady pressure amplitude of the different airfoils (×) of a cascade of nine flat plates vibrating in traveling-wave mode (σ=0 deg)
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Comparison against LINSUB (solid line) of the unsteady pressure amplitude of the different airfoils (×) of a cascade of nine flat plates vibrating in traveling-wave mode (σ=160 deg)
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Instantaneous isocontour lines of static pressure of a linear cascade of nine flat plates vibrating in traveling-wave mode; left: σ=0 deg, right: σ=160 deg
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Comparison of the unsteady pressure amplitude (top) and phase (bottom) obtained with the current method using the twm mode and a cascade of nine blades with solid lateral walls for the 10th standard configuration and two interblade phase angles σ=0 deg (left) and σ=160 deg (right)
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Isomach lines of the 10th standard configuration computation in the sidewall region
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Comparison of the unsteady pressure amplitude (top) and phase (bottom) obtained with the current method using the twm mode and a cascade of nine blades with solid lateral walls for the T106 blade and two interblade phase angles σ=0 deg (left) and σ=160 deg (right)

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