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An Unsteady Long Bearing Squeeze Film Damper ModelThis paper, the first of a two-part series, presents results of an unsteady rotordynamic analysis of a long-bearing squeeze film damper executing circular centered orbits using a fluid circuit approach. A series of nodes and branches represent the geometry of the flow circuit. The mass and momentum conservation equations are solved to predict the pressure distribution in the squeeze film. The motion of the bearing is simulated by the variation of geometry within the flow path. The modeling methodology is benchmarked against published experimental long-bearing squeeze film damper test results. The model provides good agreement with the experimental damping coefficient.
Document ID
20000021550
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Schallhorn, P. A. (Sverdrup Technology, Inc. Huntsville, AL United States)
Elrod, D. A. (Sverdrup Technology, Inc. Huntsville, AL United States)
Goggin, D. G. (Sverdrup Technology, Inc. Huntsville, AL United States)
Majumdar, A. K. (Sverdrup Technology, Inc. Huntsville, AL United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Fluid Mechanics And Thermodynamics
Meeting Information
Meeting: 38th Aerospace Sciences
Location: Reno, NV
Country: United States
Start Date: January 10, 2000
End Date: January 13, 2000
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
CONTRACT_GRANT: NAS8-40386
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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