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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Measurements Versus Predictions for the Dynamic Impedance of Annular Gas Seals—Part I: Test Facility and Apparatus

[+] Author and Article Information
M. P. Dawson

Pratt and Whitney, 400 Main Street, M/S 162-20, East Hartford, CT 06108

D. W. Childs, C. G. Holt, S. G. Phillips

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

J. Eng. Gas Turbines Power 124(4), 958-962 (Sep 24, 2002) (5 pages) doi:10.1115/1.1478075 History: Received December 01, 2000; Revised March 01, 2001; Online September 24, 2002
Copyright © 2002 by ASME
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References

Zeidan, F., Perez, R., and Stephenson, E., 1993, “The Use of Honeycomb Seals in Stabilizing Two Centrifugal Compressors,” Proceedings of the 22nd Turbomachinery Symposium, Turbomachinery Laboratory, Texas A&M University, pp. 3–15.
Gelin A., Pugnet, J., Bolusset, D., and Freiz, P., 1996, “Experience in Full Load Testing Natural Gas Compressors for Rotordynamic Improvements,” ASME Paper No. 96-GT-378.
Childs,  D., 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, pp. 152–159.
Armstrong, J., and Perricone, F., 1996, “Turbine Instability Solution—Honeycomb Seals,” Proceedings of the 25th Turbomachinery Symposium, Turbomachinery Laboratory, Texas A&M University, pp. 47–56.
Nelson,  C., 1984, “Analysis for Leakage and Rotordynamic Coefficients of Surface-Roughened Tapered Annular Gas Seals,” ASME J. Eng. Gas Turbines Power, 106, pp. 927–934.
Elrod,  D., Childs,  D., and Nelson,  C., 1990, “An Annular Gas Seal Analysis Using Empirical Entrance and Exit Region Friction Factors,” ASME J. Tribol., 112, pp. 254–258.
Ha,  T., and Childs,  D., 1994, “Annular Honeycomb-Stator Turbulent Gas Seal Analysis Using New Friction-Factor Model Based on Flat Plate Tests,” ASME J. Tribol., 116, pp. 352–360.
Kleynhans,  G., and Childs,  D., 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. 949–957.
Childs,  D., Nelson,  C., Nicks,  C., Scharrer,  J., Elrod,  D., and Hale,  K., 1986, “Theory Versus Experiment for the Rotordynamic Coefficients of Annular Gas Seals: Part I—Test Facility and Apparatus,” ASME J. Tribol., 108, pp. 426–432.
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.
Mitchell,  L., and Elliott,  K., 1984, “How to Design Stingers for Vibration Testing of Structures,” Sound Vib., Apr, pp. 14–18.
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.

Figures

Grahic Jump Location
The annular gas seal test stand
Grahic Jump Location
Closeup of stator section
Grahic Jump Location
Cross section of test stator: inlet annulus
Grahic Jump Location
Cross section of test stator: back-pressure annulus
Grahic Jump Location
AGSTS typical uncertainty spectrum

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