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TECHNICAL PAPERS

Analysis of Squeeze Film Dampers Operating With Bubbly Lubricants

[+] Author and Article Information
Luoyi Tao, Sergio Diaz, Luis San Andrés, K. R. Rajagopal

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

J. Tribol 122(1), 205-210 (Jun 29, 1999) (6 pages) doi:10.1115/1.555344 History: Received February 08, 1999; Revised June 29, 1999
Copyright © 2000 by ASME
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References

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, No. 2, pp. 282–288.
Diaz, S., and San Andrés, L., 1998, “Reduction of the Dynamic Load Capacity in a Squeeze Film Damper Operating with a Bubbly Lubricant,” ASME Paper 98-GT-109, accepted for publication at ASME J. Gas Turbines Power.
Diaz, S., and San Andrés, L., 1998, “Effects of Bubbly Flow on the Dynamic Pressure Fields of a Test Squeeze Film Damper,” 1998 ASME Fluids Engineering Division Summer Meeting, Washington, DC, June, Paper FEDSM98-5070.
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,” presented at STLE Annual Meeting, Nevada, May (STLE Preprint 99-AM-5).
Diaz, S., and San Andrés, L., 1999, “Air Entrainment vs. Lubricant Vaporization in Squeeze Film Dampers,” ASME Paper 99-GT-187, accepted for publication at ASME J. Gas Turbines Power.
Zeidan, F., San Andrés, L., and Vance, J. M., 1996, “Design and Application of Squeeze Film Dampers in Rotating Machinery,” Proc. of the 25th Turbomachinery Symposium, Texas A&M University, Sept., pp. 169–188.
Diaz, S., 1999, “The Effects of Air Entrainment on the Forced Performance of Squeeze Film Dampers: Experiments and Analysis,” Ph.D. dissertation, Department of Mechanical Engineering, Texas A&M University, May.
Atkin,  R. J., and Craine,  R. E., 1976, “Continuum Theories of Mixtures: Basic Theory and Historical Development,” Quarter. J. Mech. Appl. Math. , 29, pp. 209–244.
Bowen, R. M., 1976, “Theory of Mixtures,” Continuum Mechanics III, A. C. Eringen, ed., Academic Press, N. Y.
Rajagopal, K. R., and Tao, L., 1995, “Mechanics of Mixtures,” Series on Advances in Mathematics for Applied Sciences, Vol. 35, World Scientific, Singapore.
Tao, L., and Rajagopal, K. R., 1997, “Flows of Bubbly Liquids,” J. Appl. Mech. Eng. (to appear).
Taylor, G. I., 1932, “The Viscosity of a Fluid Containing Small Drops of Another Fluid,” Proceedings of the Royal Society, Series A138, pp. 41–48.
Chamniprasart,  K., Al-Sharif,  A., Rajagopal,  K. R., and Szeri,  A. Z., 1993, “Lubrication with Binary Mixtures: Bubbly Oil,” ASME J. Tribol., 115, pp. 253–260.
Feng,  N. S., and Hahn,  E. J., 1986, “Density and Viscosity Models for Two-Phase Homogeneous Hydrodynamic Damper Fluids,” ASLE Trans., 29, pp. 361–369.
Pinkus, O., 1990, Thermal Aspects of Fluid Film Tribology, ASME Press, New York, pp. 317–326.
Hayward, A. T., 1961, “The Viscosity of Bubbly Oil,” N.E.L. Fluids Report No. 99, National Engineering Laboratory, UK.
San Andrés,  L., and Vance,  J. M., 1986, “Effects of Fluid Inertia and Turbulence on the Force Coefficients for Squeeze Film Dampers,” ASME J. Eng. Gas Turbines Power, 108, pp. 332–339.

Figures

Grahic Jump Location
Predicted and test tangential forces versus air volume fraction (α0) at axial locations of measurement. Predicted: empty markers; experiments: filled markers.
Grahic Jump Location
Predicted and test radial forces versus air volume fraction (α0) at axial locations. Predicted: empty markers; experiments: filled markers.
Grahic Jump Location
Predicted SFD tangential force versus air volume fraction (α0)
Grahic Jump Location
SFD geometry and coordinate systems for circular centered journal orbits
Grahic Jump Location
Effect of gas volume fraction on predicted pressure fields at axial location z2=16.7 mm and ω=8.33 Hz
Grahic Jump Location
Predicted and test peak-to-peak film pressure versus air volume fraction (α0) at axial locations of measurement. Predicted: empty markers; Experiments: filled markers.
Grahic Jump Location
Predicted SFD radial force versus air volume fraction (α0)

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