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TECHNICAL PAPERS

Pressure Measurements and Flow Visualization in a Squeeze Film Damper Operating With a Bubbly Mixture

[+] Author and Article Information
Luis San Andrés

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

Sergio E. Diaz

Laboratorio de Dinamica de Maquinas, Universidad Simon Bolivar, Caracas, Miranda, 1080-A

J. Tribol 124(2), 346-350 (Feb 05, 2001) (5 pages) doi:10.1115/1.1402133 History: Received September 14, 2000; Revised February 05, 2001
Copyright © 2002 by ASME
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References

San Andrés,  L., and Vance,  J. M., 1986, “Experimental Measurement of the Dynamic Pressure Distributions in a Squeeze-Film Bearing Damper Executing Circular-Centered Orbits,” ASLE Trans. 30, No. 3, pp. 373–383.
Arauz,  G. L., and San Andrés,  L., 1993, “Experimental Pressures and Film Forces in a Squeeze Film Damper,” ASME J. Tribol., 115, pp. 134–140.
Jung,  S. Y., San Andrés,  L. A., and Vance,  J. M., 1991, “Measurements of Pressure Distributions and Force Coefficients in a Squeeze Film Damper: Part I—Fully Open Ended Configuration,” STLE Tribol. Trans., 34, No. 3, pp. 375–382.
Diaz,  S., and San Andrés,  L., 1999, “Reduction of the Dynamic Load Capacity in a Squeeze Film Damper Operating with a Bubbly Lubricant,” ASME J. Eng. Gas Turbines Power, 121, pp. 703–709.
Diaz, S., and San Andrés, L., 1999, “Air Entrainment versus Lubricant Vaporization in Squeeze Film Dampers: An Experimental Assessment of Their Fundamental Differences,” ASME Paper 99-GT-187.
Diaz,  S., and San Andrés,  L., 1998, “Measurements of Pressure in a Squeeze Film Damper With an Air/Oil Bubbly Mixture,” STLE Tribol. Trans., 41, pp. 282–288.
Zeidan,  F., and Vance,  J. M., 1990, “Cavitation Regimes in Squeeze Film Dampers and Their Effect on the Pressure Distribution,” STLE Tribol. Trans., 33, pp. 447–453.
Diaz,  S., and San Andrés,  L., 1999, “A Method for Identification of Bearing Force Coefficients and its Application to a Squeeze Film Damper with a Bubbly Lubricant,” STLE Tribol. Trans., 42, No. 4, pp. 739–746.
Rodriguez, L., Diaz, S., and San Andrés, L., 2001, “Sine Sweep Load Versus Impact Excitations and Their Influence on the Identification of Damping in a Bubbly Oil Squeeze Film Damper,” presented at the STLE Annual Meeting (Orlando, May), accepted for publication at Tribology Transactions (October 2001 issue).
Diaz,  S. San Andrés  L., 2000, “A Model for Squeeze Film Dampers Operating with Air Entrainment and Validation with Experiments,” ASME J. of Tribology, 123, No. 1, pp. 125–133.

Figures

Grahic Jump Location
Schematic view of SFD test rig
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Photographs of SFD test rig and video camera setup. (Left : test rig with adequate light source and camera. Right : Close up of SFD test section showing striated flow field.)
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Dynamic peak-peak pressures versus air/oil volume fraction at 0, Z1, and Z2. Whirl frequency 8.33 Hz.
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Development of the dynamic Pressure field versus air volume fraction (λ) at (0,Z2). Whirl frequency 8.33 Hz.
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Contour plot of squeeze film pressure versus time for increasing air volume fractions and film thickness at location (0,Z2)
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Images of flow recorded by high-speed digital camera. Frames correspond to marked circles on Fig. 4.
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Period averaged pressure field and film thickness at (0,Z2) versus time for volume fraction λ=0.854

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