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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Dynamic Response of Squeeze Film Dampers Operating With Bubbly Mixtures

[+] Author and Article Information
Luis San Andres, Oscar C. De Santiago

Mechanical Engineering Department, Texas A&M University, College Station, TX 77843-3123

J. Eng. Gas Turbines Power 126(2), 408-415 (Jun 07, 2004) (8 pages) doi:10.1115/1.1690770 History: Received December 01, 2001; Revised March 01, 2002; Online June 07, 2004
Copyright © 2004 by ASME
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References

Figures

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Test rig for measurements of imbalance response of rotor supported on hydrodynamic bearings and squeeze film dampers
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Configuration of integral squeeze film damper and flexure pivot tilting pad journal bearing
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Configuration and main dimensions of cylindrical squeeze film damper and plain journal bearing
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Response of test rotor to impacts exerted on middle disk. Dampers operating with 100% (dry lands), 50%, and 0% air content (pure oil). (a) horizontal, (b) vertical motions.
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Appearance of lubricant mixture supplied into squeeze film dampers. 30.2% air volume fraction.
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Damping coefficients versus air volume fraction as derived from impact responses. Estimates from single point and over a frequency range. Contribution of two dampers after subtraction of structural (dry) damping.
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Imbalance response of test rotor close to the middle disk for pure oil and 50% air volume fraction (a) horizontal, (b) vertical.
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Experimental and predicted damping force versus air content in a lubricated mixture. Whirl frequency=8.33 Hz, vertical bars denote experimental uncertainty. Source 1.

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