Numerical modeling of unsteady oil film motion characteristics in bearing chambers

Jingyu Zhao, Zhenxia Liu, Yaguo Lu, Jianping Hu

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

To obtain motion characteristics of the lubricating oil film on the aero-engine bearing chamber wall, a complete mathematical model based on theoretical study to solve three-dimensional unsteady oil film motion was established. On the basis of verifying the rationality of the computational model, the variations of the oil film thickness, velocity and temperature with the rotation speed and lubricating oil flow were analyzed and studied. The numerical results show that the following: In the stable oil film flow state, the oil film thickness shows a decreasing trend with increase in rotation speed and an increasing trend with increase in the lubricating oil flow. Particularly, comparison with the experimental work shows that the proposed numerical model based on theoretical study to solve unsteady oil film motion is a valuable technical means for the study of oil film movement mechanism and the design of actual bearing chamber.

Original languageEnglish
Pages (from-to)233-245
Number of pages13
JournalInternational Journal of Turbo and Jet Engines
Volume32
Issue number3
DOIs
StatePublished - 1 Sep 2015

Keywords

  • bearing chamber
  • oil film temperature
  • oil film thickness
  • two-phase flow
  • unsteady flow

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