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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Actively Controlled Bearing Dampers for Aircraft Engine Applications

[+] Author and Article Information
John M. Vance

Mechanical Engineering Department, Texas A & M University, College Station, TX 77843

Daniel Ying

Turbine Manufacturing Division, ABB Power Generation, Inc.

Jorgen L. Nikolajsen

Staffordshire University, POB 333, Stafford ST18 ODF, U.K.

J. Eng. Gas Turbines Power 122(3), 466-472 (May 15, 2000) (7 pages) doi:10.1115/1.1286922 History: Received March 09, 1999; Revised May 15, 2000
Copyright © 2000 by ASME
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References

Nikolajsen, J. L., and Hoque, M. S., 1988, “An Electroviscous Damper,” “Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA CP 3026, pp. 133–141.
Nikolajsen,  J. L., and Hoque,  M. S., 1990, “An Electroviscous Damper for Rotor Applications,” ASME J. Vibr. Acoust., 112, pp. 440–443.
Duff,  A. W., 1896, “The Viscosity of Polarized Dielectrics,” Phys. Rev., 4, No. 1, pp. 23–38.
Vance, J. M., and San Andres, L., 1999, “Analysis of Actively Controlled Coulomb Damping for Rotating Machinery,” presented at the ASME Turbo-Expo ’99 Conference, Indianapolis, IN.
Vance, J. M., and Ying, D., 1999, “Experimental Measurements of Actively Controlled Bearing Damping With an Electrorheological Fluid,” presented at the ASME Turbo-Expo ’99 Conference, Indianapolis, IN.
Vance, J. M., 1988, Rotordynamics of Turbomachinery, Wiley, New York, p. 243.
Zeidan,  F. Y., and Vance,  J. M., 1989, “Cavitation Leading to a Two Phase Fluid in a Squeeze Film Damper,” STLE Tribol. Trans., 32, pp. 100–104.
Zeidan,  F. Y., and Vance,  J. M., 1990, “Cavitation and Air Entrainment Effects on the Response of Squeeze Film Supported Rotors,” ASME J. Tribol., 112, pp. 347–353.
Valenti,  M., 1995, “Upgrading Turbine Engine Technology,” Mech. Eng., 117, pp. 56–60.
Ying, D. Z., 1993, “Experimental Study of an Electrorheological Bearing Damper With a Parametric Control System,” Master of Science thesis, Mechanical Engineering, Texas A&M University, College Station, TX.
San Andres,  L. A., 1992, “Analysis of Hydrostatic Journal Bearings With End Seals,” ASME J. Tribol., 114, pp. 802–811.
Palazzolo,  A. B., , 1989, “Piezoelectric Pushers for Active Vibration Control of Rotating Machinery,” ASME J. Vibr. Acoust., 111, pp. 298–305.
Sundararajan,  P., and Vance,  J. M., 1995, “A Theoretical and Experimental Investigation of a Gas-Operated Bearing Damper for Turbomachinery: Part I—Theoretical Model and Predictions,” ASME J. Eng. Gas Turbines Power, 117, No. 4, October, pp. 742–749.
Sundararajan,  P., and Vance,  J. M., 1995, “A Gas-Operated Bearing Damper for Turbomachinery—Theoretical Predictions versus Experimental Measurements: Part II—Experimental Results and Comparison With Theory,” ASME J. Eng. Gas Turbines Power, 117, No. 4, pp. 750–756.
Nikolajsen,  J. L., Holmes,  R., and Gondhalekar,  V., 1979, “Investigation of an Electromagnetic Damper for Vibration Control of a Transmission Shaft,” Proc. MechE, 193, pp. 331–336.
Active Magnetic Bearings, 1986, Magnetic Bearings Inc., Radford, VA.
Nikolajsen, J. L., 1989, “Experimental Investigation of an Eddy-Current Bearing,” in Magnetic Bearings, G. Schweitzer, ed., Springer, New York, pp. 111–118.
Cherry,  L. B., 1960, “Electro-Magnetic Induction Damping of Vibratory Motion,” Noise Control, Sept/Oct , pp. 8–11.
Choi, K. N., and Nikolajsen, J. L., 1989, “The Effect of Vibration Frequency in Eddy Current Dampers,” internal report, Texas A&M University, College Station, TX.
Nikolajsen, J. L., and Palazzolo, A. B., 1992, “Electromagnetic Force Application in Rotordynamic Research,” in Tani, J., and Takagi, T., eds., Electromagnetic Forces and Applications, Elsevier, New York, pp. 163–166.

Figures

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Cross section of the ER damper
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Electroviscous fluid behavior (from Nikolajsen and Hoque, 1990)
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Effect of viscous damping on vibration amplitude
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Dimensionless bearing force vs. frequency ratio
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Coulomb friction test rig with dry friction disks
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DC electromagnetic damper operating principle
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Eddy-current damper operating principle
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Eddy-current damper rig
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Measured eddy current damping
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Predicted eddy current damping
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ER damper weight vs. yield stress of the ER fluid
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Specific damping of the ER damper vs. yield shear stress of the ER fluid

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