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A transient thermal analysis for dynamically loaded bearings

Authors
Journal
Computers & Fluids
0045-7930
Publisher
Elsevier
Publication Date
Volume
29
Issue
7
Identifiers
DOI: 10.1016/s0045-7930(99)00035-3
Disciplines
  • Design

Abstract

Abstract A transient thermal analysis for a dynamic journal bearing system is presented in this paper based on a non-isothermal non-Newtonian fluid model. A spectral element approach is used to solve the full set of coupled equations (kinematics and constitutive) governing the flow of the lubricant, and an operator-splitting spectral element approximation is used to solve the dynamic energy equation. The transient thermal effects in the lubricant viscosity, non-Newtonian lubricant film thickness, variation of the journal rotating speed and time dependent applied load are investigated in this paper. The numerical results indicate that the thermal dynamic analysis plays an important role in the design of the journal bearing systems, especially, under large applied loads and high rotating speeds.

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