Bubble Flow Analysis of High Speed Cylindrical Roller Bearing under Fluid-Solid Thermal Coupling
Joint Authors
Zhang, Yan-Lei
Cui, Li
Wang, Wenxia
Source
International Journal of Rotating Machinery
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-09-13
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Heat generation model of high speed cylindrical roller bearing is constructed by calculating the local friction in the bearing.
Bubble flow calculation model of roller bearing considering fluid-solid thermal coupling is constructed based on two-body fluid model and k-ε turbulent model, in which diameter and size of bubbles, breakup, and coalescence model of bubbles are considered.
Using dynamic mesh method, a new method for evaluating bearing temperature is set up treating the rolling elements as moving heat sources.
Based on these models and finite element method, bubble flow of a high speed roller bearing is studied based on FLUENT software.
The numerical study reveals the relationship between velocity of bearing, air volume fraction, and velocity and pressure of oil-air flow.
An increase of air content in the oil produces a lower pressure at the bearing outlet while the exit fluid velocity increases.
When fluid-solid thermal coupling effect is considered, velocity and pressure at outlet of the bearing both become larger, while temperature of bearing is lower than that without coupling.
In comparison, the coupling effects on flow pressure and temperature are obvious.
For a given rotating speed, there is an optimal value for air volume fraction, such that temperature rise of the bearing reaches the lowest value.
Experiments verify the outcomes of the method presented in this paper.
American Psychological Association (APA)
Cui, Li& Wang, Wenxia& Zhang, Yan-Lei. 2017. Bubble Flow Analysis of High Speed Cylindrical Roller Bearing under Fluid-Solid Thermal Coupling. International Journal of Rotating Machinery،Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1169611
Modern Language Association (MLA)
Cui, Li…[et al.]. Bubble Flow Analysis of High Speed Cylindrical Roller Bearing under Fluid-Solid Thermal Coupling. International Journal of Rotating Machinery No. 2017 (2017), pp.1-11.
https://search.emarefa.net/detail/BIM-1169611
American Medical Association (AMA)
Cui, Li& Wang, Wenxia& Zhang, Yan-Lei. Bubble Flow Analysis of High Speed Cylindrical Roller Bearing under Fluid-Solid Thermal Coupling. International Journal of Rotating Machinery. 2017. Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1169611
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1169611