Rotor-bearing systems supported on squeeze film dampers (SFDs) show large amplitude vibratory motions when traversing critical speeds. At these operating conditions air is drawn into the damper thin film clearance generating a bubbly mixture with the lubricant and producing SFD forces not readily predictable with currently available analysis. A continuum model is proposed for describing the motion of a bubbly fluid in an open ended SFD operating with circular centered journal orbits. Computed predictions for peak-peak dynamic pressures and fluid film forces agree reasonably well with experimental measurements conducted on a SFD test rig operating with a controlled air in oil mixture. The bubbly flow model provides an initial procedure towards the reliable design of SFDs in actual operating conditions. [S0742-4787(00)02601-1]
Analysis of Squeeze Film Dampers Operating With Bubbly Lubricants
Contributed by the Tribology Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS and presented at the STLE/ASME Tribology Conference, Orlando, FL, October 10–13, 1999. Manuscript received by the Tribology Division February 8, 1999; revised manuscript received June 29, 1999. Paper No. 99-Trib-33. Associate Technical Editor. M. M. Khonsari.
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Tao , L., Diaz , S., Andre´s , L. S., and Rajagopal , K. R. (June 29, 1999). "Analysis of Squeeze Film Dampers Operating With Bubbly Lubricants ." ASME. J. Tribol. January 2000; 122(1): 205–210. https://doi.org/10.1115/1.555344
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