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TECHNICAL PAPERS

Computational and Mathematical Modeling of Turbine Rim Seal Ingestion

[+] Author and Article Information
Nicholas J. Hills

Thermo-Fluid Mechanics Research Centre, University of Sussex, Brighton, BN1 9QT, UK

John W. Chew

School of Mechanical and Materials Engineering, University of Surrey, Surrey, GU2 7XH, UK

Alan B. Turner

Thermo-Fluid Mechanics Research Center, University of Sussex, Brighton, BN1 9QT, UK

J. Turbomach 124(2), 306-315 (Apr 09, 2002) (10 pages) doi:10.1115/1.1456461 History: Received November 20, 2000; Online April 09, 2002
Copyright © 2002 by ASME
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References

Figures

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Schematic of Experimental Rig
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Schematic showing guide vanes, pressure tappings, and rotor pegs—(a) pressure tappings in unbroken annulus, (b) positions of vanes and rotor pegs
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Computational domain for model 4
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Convergence of concentration at r/r0=0.41 stator measurement point for unsteady solution
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Comparison of calculated and measured annulus pressures
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Static pressure asymmetry due to vane alone and rotor peg alone
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Comparison of calculated and measured disc cavity pressures
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Comparison of calculated and measured concentration in the cavity
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Contours of instantaneous concentration on the radial plane in the seal gap 1 mm inboard of the inner annulus wall for two rotor peg positions—(a) time point A, (b) time point B
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Instantaneous velocity vector plots (axial-radial plane) at time position A—(a) fraction of NGV pitch=0, (b) fraction of NGV pitch=0.5
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Pressure, radial velocity and concentration in the rim seal gap on the line 0.1 mm from the rotor, and 1 mm radially inboard of the inner annulus wall
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Comparison of simple model with data from Chew et al. 10
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Comparison of simple model with data from the present configuration
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Comparison of measured and calculated cavity pressure
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Calculated mass inflow from simple model for steady conditions with no sealing flow

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