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TECHNICAL PAPERS

Theory Versus Experiment for the Rotordynamic Impedances of Two Hole-Pattern-Stator Gas Annular Seals

[+] Author and Article Information
Christopher G. Holt, Dara W. Childs

Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843-3123

J. Tribol 124(1), 137-143 (Jun 05, 2001) (7 pages) doi:10.1115/1.1398297 History: Received February 20, 2001; Revised June 05, 2001
Copyright © 2002 by ASME
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References

Childs, D. W., 1993, Turbomachinery Rotordynamics: Phenomena, Modeling, & Analysis, John Wiley & Sons, Inc., New York, p. 291.
Childs,  D. W., and Moyer,  D., 1985, “Vibration Characteristics of the HPOTP (High-Pressure Oxygen Turbopump) of the SSME (Space Shuttle Main Engine),” ASME J. Eng. Gas Turbines Power, 107, No. 1, pp. 152–159.
Zeidan, F., Perez, R., and Stephenson, M., 1993, “The Use of Honeycomb Seals in Stabilizing Two Centrifugal Compressors,” Proceedings of the Twenty-Second Turbomachinery Symposium, Turbomachinery Laboratory, Texas A&M University, pp. 3–15.
Armstrong, J., and Perricone, F., 1996, “Turbine Instability Solution-Honeycomb Seals,” Proceedings of the Twenty-fifth Turbomachinery Symposium, Turbomachinery Laboratory, Texas A&M University, pp. 47–56.
Yu,  Z., and Childs,  D. W., 1998, “A Comparison of Experimental Rotordynamic Coefficients and Leakage Characteristics Between Hole-Pattern Gas Damper Seals and a Honeycomb Seal,” ASME J. Eng. Gas Turbines Power, 120, pp. 778–783.
Kleynhans,  G. F., and Childs,  D. W., 1997, “The Acoustic Influence of Cell Depth on the Rotordynamic Characteristics of Smooth-Rotor/Honeycomb-Stator Annular Gas Seals,” ASME J. Eng. Gas Turbines Power, 119, pp. 949–956.
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.
Dawson, M. P., 2000, “A Comparison of the Static and Dynamic Characteristics of Straight-Bore and Convergent Tapered-Bore Honeycomb Annular Gas Seals,” Masters thesis, Texas A&M University, College Station, TX.
Memmott, E. A., 1994, “Stability of a High Pressure Centrifugal Compressor Through Application of Shunt Holes and a Honeycomb Labyrinth,” 13th Machinery Dynamics Seminar, Toronto, Canada, September 12–13.
Childs,  D., and Hale,  K., 1994, “A Test Apparatus and Facility to Identify the Rotordynamics Coefficients of High-Speed Hydrostatic Bearings,” ASME J. Tribol., 116, pp. 337–344.
Rouvas, C., 1993, “Parameter Identification of the Rotordynamic Coefficients of High-Reynolds-Number Hydrostatic Bearings,” Dissertation, Office of Graduate Studies Texas A&M University, College Station, TX.
Kurtin,  K. A., Childs,  D. W., San Andrés,  L. A., and Hale,  R. K., 1993, “Experimental Versus Theoretical Characteristics of a High-Speed Hybrid (Combination Hydrostatic and Hydrodynamic) Bearing,” ASME J. Tribol., 115, pp. 160–169.
McGreehan, W. F., and Ko, S. H., 1989, “Power Dissipation in Smooth and Honeycomb Labyrinth Seals,” ASME IGTI Gas Turbine and Aeroengine Congress and Exposition, ASME Paper 89-GT-220.

Figures

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Compressor seal arrangements (eye-packing, interstage, balance-piston) Childs 1
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Hole-pattern, honeycomb, and labyrinth geometry
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Control volume locations within seal/rotor assembly
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Annular gas seal test stand
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Impedances (D and E) HS, LP, and 40 percent PR
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Impedances (D and E) HS, MP, and 40 percent PR
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Impedances (D and E) HS, HP, and 40 percent PR
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Effective stiffness and damping HS, LP, and 40 percent PR
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Effective stiffness and damping HS, MP, and 40 percent PR
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Effective stiffness and damping HS, HP, and 40 percent PR
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Effective stiffness and damping versus pressure ratio of 2.03 mm seal at HS and HP
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Effective stiffness and damping comparison between 2.03 mm seal, 3.18 mm seal, and 3.10 mm cell depth honeycomb seal at HS, MP, and 40 percent PR
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Measured versus predicited impedances for 2.03 mm hole-depth seal at LS, HP, and 40 percent pressure ratio
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Measured versus predicted impedances for the 3.18 mm seal, LS, HP, 40 percent PR
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Experiment vs. prediction, effective stiffness and damping of 2.03 mm hole-pattern seal at LS, HP, and 40 percent PR
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Experiment vs. prediction, effective stiffness and damping of 3.18 mm hole-depth seal at LS, HP, and 40 percent PR

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