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Journal of Mechanical Science and Technology

, Volume 33, Issue 1, pp 77–86 | Cite as

Investigation of the effect of cavitation and journal whirl on static and dynamic characteristics of journal bearing

  • Dan Sun
  • Shengyuan Li
  • Chengwei FeiEmail author
  • Yanting Ai
  • Rhea. P Liem
Article
  • 11 Downloads

Abstract

The cavitation phenomenon in journal bearing and journal whirl are considered to evaluate the static and dynamic characteristics of journal bearing, to be more consistent with the actual operating conditions of journal bearing. With a 3D CFD method, the cavitation and journal whirl are simulated by adopting mesh deformation technique and mixture phase-change model. By comparing the results with those of the traditional Reynolds equation, we observe that first, the phenomena of cavitation and journal whirl are very consistent with the actual operating conditions of journal bearing. Moreover, for single-phase and two-phase flow models, the distribution features of oil film pressure are similar in convergent wedge zone while largely different in divergent part of the gap. The oil film pressure and vapor phase volume fraction notably vary on different whirl positions of the journal. We also observe that as whirl frequency increases, the oil film force gradually increases and the stability of journal bearing decreases rapidly before reaching a plateau. The efforts of this paper provide an efficient method to accurately evaluate the static and dynamic characteristics of journal bearing and offer a useful insight into the accurate analysis and design of journal bearing.

Keywords

Journal bearing Static characteristics Dynamic characteristics Cavitation Journal whirl 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Dan Sun
    • 1
  • Shengyuan Li
    • 1
  • Chengwei Fei
    • 2
    Email author
  • Yanting Ai
    • 1
  • Rhea. P Liem
    • 3
  1. 1.Liaoning Key Lab of Advanced Test Technology for Aerospace Propulsion SystemShenyang Aerospace UniversityShenyangChina
  2. 2.Department of Aeronautics and AstronauticsFudan UniversityShanghaiChina
  3. 3.Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and TechnologyHong KongChina

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