Reverse Flow in Submerged Journal Bearings

In this study, the Navier-Stokes equations, solved by a computational fluid dynamics (CFD) method with the two-phase flow, are used to analyze the flow in submerged journal bearings. The "tongue"-shaped reverse flow, which was observed experimentally near the end of the cavitation zone, is...

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Bibliographic Details
Published in:Tribology transactions 2023-01, Vol.66 (1), p.162-174
Main Authors: Wei, Shanshan, Kligerman, Yuri, Goltsberg, Roman
Format: Article
Language:English
Subjects:
Bearing strength
Cavitation
CFD analysis
Computational fluid dynamics
Design parameters
journal bearing
Journal bearings
Load carrying capacity
Mathematical models
Pressure distribution
Reverse flow
Reversed flow
submerged
Two phase flow
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Summary:In this study, the Navier-Stokes equations, solved by a computational fluid dynamics (CFD) method with the two-phase flow, are used to analyze the flow in submerged journal bearings. The "tongue"-shaped reverse flow, which was observed experimentally near the end of the cavitation zone, is predicted with the presented model. The effects of various design and operational parameters, including eccentricity ratio, supply pressure, rotational speed, oil viscosity, and radial clearance, on the location, length, and frequency of the reverse flow are presented and explained. The load-carrying capacity of the journal bearing is found to fluctuate with the same pattern as that of the reverse flow, which may result in a vibration of the entire shaft-bearing system. Comparisons with experimental results of pressure distribution validate the present model in solving reverse flow near the cavitation region.
ISSN:1040-2004
1547-397X
DOI:10.1080/10402004.2022.2161081