Dynamic force response of an open-ended squeeze film damper

Journal Article · Thu Apr 01 04:00:00 EST 1993 · Journal of Engineering for Gas Turbines and Power; (United States)

DOI:https://doi.org/10.1115/1.2906714· OSTI ID:6400354

San Andres, L A; Meng, G; Yoon, S ^[1]

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1. Texas A and M Univ., College Station (United States)

The effects of whirl frequency and lubricant viscosity on the experimental pressure field and film forces in an open-ended squeeze film damper test rig are presented. The measurements refer to circular centered journal motion of amplitude equal to one half the damper clearance ([epsilon] = 0.5). The whirl frequency varied between 16 Hz and 85 Hz, while the lubricant temperature increased from 25 C to 45 C. The damper operated with levels of external pressurization that suppressed lubricant cavitation. The experimental results show conclusively that the radial film force is purely an inertial effect, i.e., it depends solely on the fluid density and the second power of the whirl frequency. The tangential film force shows a variation that depends on the viscous and inertial flow conditions in the squeeze film region. Correlation of experimental forces with conventional SFD models shows the radial force to be [pi] times larger than the theoretical prediction, while the tangential force correlates well for low whirl frequencies and large lubricant viscosities.

• OSTI ID: 6400354
• Journal Information: Journal of Engineering for Gas Turbines and Power; (United States), Journal Name: Journal of Engineering for Gas Turbines and Power; (United States) Vol. 115:2; ISSN JETPEZ; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
DAMPING
ENGINES
FILMS
FLUID FLOW
GAS TURBINE ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MATERIALS TESTING
MATHEMATICAL MODELS
MECHANICAL TESTS
MECHANICAL VIBRATIONS
MOMENT OF INERTIA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
TESTING
VISCOUS FLOW