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TECHNICAL PAPERS: Gas Turbines: Heat Transfer and Turbomachinery

Influence of a Honeycomb Facing on the Flow Through a Stepped Labyrinth Seal

[+] Author and Article Information
V. Schramm, K. Willenborg, S. Kim, S. Wittig

Lehrstuhl und Institut für Thermische Strömungsmaschinen, Universität Karlsruhe, Kaiserstr. 12, D-76128 Karlsruhe, Germany

J. Eng. Gas Turbines Power 124(1), 140-146 (Feb 01, 2000) (7 pages) doi:10.1115/1.1403460 History: Received November 01, 1999; Revised February 01, 2000
Copyright © 2002 by ASME
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References

Wittig,  S., Dörr,  L., and Kim,  S., 1983, “Scaling Effects on Leakage Losses in Labyrinth Seals,” ASME J. Eng. Gas Turbines Power, 105, pp. 305–309.
McGreehan, W. F., and Ko, S. H., 1989, “Power Dissipation in Smooth and Honeycomb Seals,” ASME Paper 89-GT-220.
Waschka,  W., Wittig,  S., and Kim,  S., 1990, “Influence of High Rotational Speeds on the Heat Transfer and Discharge Coefficients in Labyrinth Seals,” ASME J. Turbomach., 114, pp. 462–468.
Rhode,  D., Ko,  S., and Morrison,  G., 1994, “Leakage Optimization of Labyrinth Seals Using a Navier-Stokes Code,” Tribol. Trans., 37, No. 1, pp. 105–110.
Rhode,  D., Ko,  S., and Morrison,  G. L., 1994, “Experimental and Numerical Assessment of an Advanced Labyrinth Seal,” Tribol. Trans., 37, No. 4, pp. 743–750.
Rhode,  D. L., and Allen,  B. F., 2001, “Measurement and Visualization of Leakage Effects of Rounded Teeth Tips and Rub-Grooves on Stepped Labyrinth,” ASME J. Eng. Gas Turbines Power, 123, pp. 604–611.
Prassad, B., Sethu Manavalan, V., and Nanjunda Rao, N., 1997, “Computational and Experimental Investigations of Straight-Through Labyrinth Seal,” ASME Paper 97-GT-326.
Komotori, K., and Miyake, K., 1977, “Leakage Characteristics of Labyrinth Seals With High Rotating Speed,” 1977 Tokyo Joint Gas Turbine Congress.
Stocker, H. L., 1978, “Determining and Improving Labyrinth Seal Performance in Current and Advanced High Performance Gas Turbines,” AGARD CP273.
Brownell,  J. B., Millward,  J. A., and Parker,  R. J., 1989, “Non-Intrusive Investigations Into Life-Size Labyrinth Seal Flow Fields,” ASME J. Eng. Gas Turbines Power, 111, pp. 335–342.
Wittig,  S., Jacobsen,  K., Schelling,  U., and Kim,  S., 1988, “Heat Transfer in Stepped Labyrinth Seals,” ASME Eng. Gas Turbines Power, 110, pp. 63–69.
Wittig, S., Jacobsen, K., Schelling, U., and Kim, S., 1987, “Numerical Predictions and Measurements of Discharge Coefficients in Labyrinth Seals,” ASME Paper 87-GT-188.
Waschka, W., Wittig, S., Kim, S., and Scherer, T., 1993, “Heat Transfer and Leakage in High-Speed Rotating Stepped Labyrinth Seals,” AGARD Conference Proceedings 527, paper 26.
Willenborg, K., Schramm, V., Kim, S., and Wittig, S., 2000, “Influence of a Honeycomb Facing on the Heat Transfer in a Stepped Labyrinth Seal,” ASME Paper 2000-GT-0290.
TASCflow User Documentation, 1996, Advanced Scientific Computing Ltd.
Benim, A. C., and Arnal, M., 1994, “A Numerical Analysis of the Labyrinth Seal Flow,” Computational Fluid Dynamics 94, John Wiley and Sons, Ltd., London.
Zimmermann, H., and Wolff, K. H., 1998, “Air System Correlations, Part 1: Labyrinth Seals,” ASME Paper 98-GT-206.
Ha,  T. W., and Childs,  D. W., 1992, “Friction-Factor Data for Flat Plate Tests of Smooth and Honeycomb Surfaces,” ASME J. Tribol., 114, pp. 722–730.
Ha,  T. W., and Childs,  D. W., 1994, “Annular Honeycomb-Stator Turbulent Gas Seal Analysis Using a New Friction-Factor Model Based on Flat Plate Tests,” ASME J. Tribol., 116, pp. 352–360.

Figures

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Geometry of labyrinth seal: h/t=0.46,H/t=0.14,b/t=0.047,HC/t=0.86,L/t=0.23,s/t=0.043,[[ellipsis]],0.114,t=28 mm
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Labyrinth seal test facility
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Computational grid, configuration with honeycombs
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Geometric situation near the gap, configuration with honeycombs
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Estimated influence of honeycomb facing on seal leakage
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Flow field, smooth configuration, π=1.1
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Discharge coefficients, smooth configuration
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Computed flow field, π=1.1, s3
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Flow field detail (CFD)
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Flow field with honeycombs (LDV), s3, π=1.1
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Flow field with honeycombs (LDV), s1, π1.1
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Influence of honeycomb-lands on discharge characteristics

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