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Effect of shaft frequency on cavitation in a journal bearing for noncentered circular whirlThe effect of shaft frequency on the performance of a submerged journal undergoing noncentered circular whirl is examined. The main emphasis of the paper is on the behavior of the vapor cavitation bubble and its effect on the bearing performance as a function of frequency. A cavitation algorithm due to Elrod was implemented in a computer program which solves a time-dependent Reynolds equation. This algorithm automatically handles the boundary conditions by using a switch function and a control volume approach which conserves mass throughout the entire flow. The shaft frequencies in this investigation ranged from 0 rad/s (squeeze-film damper) to -104 rad/s (a case in which oil-whip condition was produced momentarily). For the particular vibration amplitude chosen in this investigation it was observed that vapor cavitation had an effect on the load components for the full range of shaft frequencies investigated.
Document ID
19870012689
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Brewe, David E. (NASA Lewis Research Center Cleveland, OH, United States)
Khonsari, M. M. (Ohio State Univ. Columbus., United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
NASA-TM-88925
NAS 1.15:88925
USAAVSCOM-TR-86-C-41
E-3361
Accession Number
87N22122
Funding Number(s)
PROJECT: RTOP 505-63-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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