Numerical Investigation of Turbulence Models for a Superlaminar Journal Bearing
Joint Authors
Ding, Aoshuang
Ren, Xiaodong
Li, Xuesong
Gu, Chunwei
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-01-03
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
With rotating machineries working at high speeds, oil flow in bearings becomes superlaminar.
Under superlaminar conditions, flow exhibits between laminar and fully developed turbulence.
In this study, superlaminar oil flow in an oil-lubricated tilting-pad journal bearing is analyzed through computational fluid dynamics (CFD).
A three-dimensional bearing model is established.
CFD results from the laminar model and 14 turbulence models are compared with experimental findings.
The laminar simulation results of pad-side pressure are inconsistent with the experimental data.
Thus, the turbulence effects on superlaminar flow should be considered.
The simulated temperature and pressure distributions from the classical fully developed turbulence models cannot correctly fit the experimental data.
As such, turbulence models should be corrected for superlaminar flow.
However, several corrections, such as transition correction, are unsuitable.
Among all the flow models, the SST model with low-Re correction exhibits the best pressure distribution and turbulence viscosity ratio.
Velocity profile analysis confirms that a buffer layer plays an important role in the superlaminar boundary layer.
Classical fully developed turbulence models cannot accurately predict the buffer layer, but this problem can be resolved by initiating an appropriate low-Re correction.
Therefore, the SST model with low-Re correction yields suitable results for superlaminar flows in bearings.
American Psychological Association (APA)
Ding, Aoshuang& Ren, Xiaodong& Li, Xuesong& Gu, Chunwei. 2018. Numerical Investigation of Turbulence Models for a Superlaminar Journal Bearing. Advances in Tribology،Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1122960
Modern Language Association (MLA)
Ding, Aoshuang…[et al.]. Numerical Investigation of Turbulence Models for a Superlaminar Journal Bearing. Advances in Tribology No. 2018 (2018), pp.1-14.
https://search.emarefa.net/detail/BIM-1122960
American Medical Association (AMA)
Ding, Aoshuang& Ren, Xiaodong& Li, Xuesong& Gu, Chunwei. Numerical Investigation of Turbulence Models for a Superlaminar Journal Bearing. Advances in Tribology. 2018. Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1122960
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122960