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CLC number: TH113.31

On-line Access: 2012-04-06

Received: 2011-10-19

Revision Accepted: 2011-12-29

Crosschecked: 2012-02-27

Cited: 12

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Journal of Zhejiang University SCIENCE A 2012 Vol.13 No.4 P.293-310


A new method for studying the 3D transient flow of misaligned journal bearings in flexible rotor-bearing systems

Author(s):  Qiang Li, Shu-lian Liu, Xiao-hong Pan, Shui-ying Zheng

Affiliation(s):  Institute of Chemical Machinery, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   liqiangsydx@163.com, zhengshuiying@zju.edu.cn

Key Words:  Misalignment, Transient flow, Computational fluid dynamics (CFD), Fluid-structure interaction (FSI), Journal bearing

Qiang Li, Shu-lian Liu, Xiao-hong Pan, Shui-ying Zheng. A new method for studying the 3D transient flow of misaligned journal bearings in flexible rotor-bearing systems[J]. Journal of Zhejiang University Science A, 2012, 13(4): 293-310.

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author="Qiang Li, Shu-lian Liu, Xiao-hong Pan, Shui-ying Zheng",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T A new method for studying the 3D transient flow of misaligned journal bearings in flexible rotor-bearing systems
%A Qiang Li
%A Shu-lian Liu
%A Xiao-hong Pan
%A Shui-ying Zheng
%J Journal of Zhejiang University SCIENCE A
%V 13
%N 4
%P 293-310
%@ 1673-565X
%D 2012
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1100228

T1 - A new method for studying the 3D transient flow of misaligned journal bearings in flexible rotor-bearing systems
A1 - Qiang Li
A1 - Shu-lian Liu
A1 - Xiao-hong Pan
A1 - Shui-ying Zheng
J0 - Journal of Zhejiang University Science A
VL - 13
IS - 4
SP - 293
EP - 310
%@ 1673-565X
Y1 - 2012
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1100228

The effects of journal misalignment on the transient flow of a finite grooved journal bearing are presented in this study. A new 3D computational fluid dynamics (CFD) analysis method is applied. Also, the quasi-coupling calculation of transient fluid dynamics of oil film in journal bearing and rotor dynamics is considered in the analysis. Based on the structured mesh, a new approach for mesh movement is proposed to update the mesh volume when the journal moves during the fluid dynamics simulation of an oil film. Existing dynamic mesh models provided by FLUENT are not suitable for the transient oil flow in journal bearings. The movement of the journal is obtained by solving the moving equations of the rotor-bearing system with the calculated film pressure as the boundary condition of the load. The data exchange between fluid dynamics and rotor dynamics is realized by data files. Results obtained from the CFD model were consistent with previous experimental results on misaligned journal bearings. Film pressure, oil film force, friction torque, misalignment moment and attitude angle were calculated and compared for misaligned and aligned journal bearings. The results indicate that bearing performances are greatly affected by misalignment which is caused by unbalanced excitation, and the CFD method based on the fluid-structure interaction (FSI) technique can effectively predict the transient flow field of a misaligned journal bearing in a rotor-bearing system.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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