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Linear Stability Analysis of Journal Bearings Lubricated With a Non-Newtonian Rabinowitsch Fluid

Published online by Cambridge University Press:  28 June 2017

J. R. Lin ,
T. C. Hung  and
C. H. Lin
J. R. Lin*
Affiliation:
Nanya Institute of TechnologyTaoyuan, Taiwan
T. C. Hung
Affiliation:
National Taipei University of TechnologyTaipei, Taiwan
C. H. Lin
Affiliation:
National Taipei University of TechnologyTaipei, Taiwan
*
*Corresponding author (jrlin@nanya.edu.tw)
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Abstract

The linear stability boundaries of journal bearings lubricated with a non-Newtonian fluid have been investigated in this paper. Based on the Rabinowitsch fluid model, a non-Newtonian dynamic Reynolds equation for journal bearings is derived and then applied to analyze the linear dynamic characteristics of short journal bearings. Comparing with the Newtonian-lubricant case, the non-Newtonian rheology of dilatant lubricants provides a larger area of linearly stable region. However, the non-Newtonian properties of pseudo-plastic lubricants results in a reverse trend for the short journal bearing.

Keywords

Linear stabilityRabinowitsch fluidsJournal bearingsThreshold speeds
Type
Research Article
Information
Journal of Mechanics , Volume 35 , Issue 1 , February 2019 , pp. 107 - 112
Copyright
Copyright © The Society of Theoretical and Applied Mechanics 2019 

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