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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Measurements of Rotordynamic Coefficients of Hybrid Bearings With (a) a Plugged Orifice, and (b) a Worn Land Surface

[+] Author and Article Information
F. Laurant, D. W. Childs

Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843-3254

J. Eng. Gas Turbines Power 124(2), 363-368 (Mar 26, 2002) (6 pages) doi:10.1115/1.1403461 History: Received November 01, 1999; Revised February 01, 2000; Online March 26, 2002
Copyright © 2002 by ASME
Topics: Bearings , Wear
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References

Scharrer,  J. K., Hecht,  R. I., and Hibbs,  R. I., 1991, “The Effects of Wear on the Rotordynamic Coefficients of a Hydrostatic Journal Bearing,” ASME J. Tribol., 113, pp. 210–213.
San Andrés,  L. A., 1990, “Turbulent Hybrid Bearings With Fluid Inertia Effects,” ASME J. Tribol., 112, pp. 699–707.
San Andrés,  L. A., 1992, “Analysis of Turbulent Hydrostatic Bearings With a Barotropic Fluid,” ASME J. Tribol., 114, pp. 755–765.
Kurtin,  K. A., Childs,  D. W., San Andrés,  L. A., and Hale,  R. K., 1991, “Experimental Versus Theoretical Characteristics of a High-Speed Hybrid (Combination Hydrostatic and Hydrodynamic) Bearing,” ASME J. Tribol., 115, pp. 160–169.
Childs,  D. W., and Hale,  R. K., 1994, “A Test Apparatus and Facility to Identify the Rotordynamic Coefficients of High-Speed Hydrostatic Bearings,” ASME J. Tribol., 116, pp. 337–344.
Lund,  J. W., 1966, “The Stability of an Elastic Rotor in Journal Bearings With Flexible Damped Supports,” ASME J. Appl. Mech., 27, pp. 911–920.

Figures

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Plugged-orifice test bearing geometry
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Wear on the bearing land geometry
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Direct stiffness at high-speed versus eccentricity ratio and supply pressure for the plugged-orifice test
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Cross-coupled stiffness at high-speed versus eccentricity ratio and supply pressure for the plugged-orifice test
Grahic Jump Location
Direct damping at high-speed versus eccentricity ratio and supply pressure for the plugged-orifice test
Grahic Jump Location
Whirl frequency ratio at high-speed versus eccentricity ratio and supply pressure for the plugged-orifice test
Grahic Jump Location
Static load at high-speed versus eccentricity ratio and supply pressure for the plugged-orifice test
Grahic Jump Location
Direct stiffness at high-speed versus eccentricity ratio and supply pressure for the worn land surface test
Grahic Jump Location
Cross-coupled stiffness at high-speed versus eccentricity ratio and supply pressure for the worn land surface test
Grahic Jump Location
Direct damping at high-speed versus eccentricity ratio and supply pressure for the worn land surface test
Grahic Jump Location
Static load at high-speed versus eccentricity ratio and supply pressure for the worn land surface test

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