Full Text:   <7723>

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

Clicked: 7132

Citations:  Bibtex RefMan EndNote GB/T7714

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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


[1]Arumugam, P., Swarnamani, S., Prabhu, B.S., 1997. Effects of journal misalignment on the performance characteristics of three-lobe bearings. Wear, 206(1-2):122-129.

[2]Asanable, S., Akahoshi, M., Asai, R., 1971. Theoretical and Experimental Investigation of Misaligned Journal Bearing Performance. Tribology Convention, Institution of Mechanical Engineers, London, C36/71.

[3]Banwait, S.S., Chandrawat, H.N., Adithan, M., 1998. Thermohydrodynamic Analysis of Misaligned Plain Journal Bearing. Proceeding of First Asia International Conference on Tribology, Beijing, p.35-40.

[4]Boedo, S., Booker, J.F., 2004. Classic bearing misalignment and edge loading: a numerical study of limiting cases. Journal of Tribology, 126(3):535-541.

[5]Bouyer, J., Fillon, M., 2002. An experimental analysis of misalignment effects on hydrodynamic plain journal bearing performances. Journal of Tribology, 124(2):313-319.

[6]Bou-Said, B., Nicolas, D., 1992. Effects of misalignment on static and dynamic characteristics of hybrid bearings. Tribology Transactions, 35(2):325-331.

[7]Buckholz, R.H., Lin, J.F., 1986. The effect of journal bearing misalignment on load and cavitation for non-Newton lubricants. Journal of Tribology, 108(4):645-654.

[8]Chen, P.Y.P., Hahn, E.J., 1998. Use of computational fluid dynamics in hydrodynamic lubrication. Journal of Engineering Tribology, 212(6):427-436.

[9]Chen, P.Y.P., Hahn, E.J., 2000. Side clearance effects on squeeze film damper performance. Tribology International, 33(3-4):161-165.

[10]Dowson, D., Taylor, C.M., 1979. Cavitation in bearings. Annual Review of Fluid Mechanics, 11(1):35-66.

[11]Dubois, G.B., Ocvirk, F.W., Wehe, R.L., 1951. Experimental Investigation of Oil Film Pressure Distribution for Misaligned Plain Bearings. NCAC, Technical Note 2507, Washington.

[12]Dubois, G.B., Mabic, H.H., Ocvirk, F.W., 1955. Experimental Investigation of Misalignment Couples and Eccentricity at Ends of Misaligned Plain Bearings. NCAC, Technical Note 3352, Washington.

[13]Dubois, G.B., Ocvirk, F.W., Wehe, R.L., 1957. Properties of misaligned journal bearing. Journal of Basic Engineering, 79:1205-1212.

[14]FLUENT, 2006. Fluent 6.3 User’s Guide. New Hampshire (USA) Fluent Incorporation, Lebanon.

[15]Gertzos, K.P., Nikolakopoulos, P.G., Papadopoulos, C.A., 2008. CFD analysis of journal bearing hydrodynamic lubrication by Bingham lubricant. Tribology International, 41(12):1190-1204.

[16]Guha, S.K., 2000. Analysis of steady-state characteristics of misaligned hydrodynamic journal bearings with isotropic roughness effect. Tribology International, 33(1):1-12.

[17]Guo, Z.L., Hirano, T., Kirk, R.G., 2005. Application of CFD analysis for rotating machinery. part I. hydrodynamic, hydrostatic bearings and squeeze film damper. Journal of Engineering for Gas Turbines and Power, 127(2):445-451.

[18]Jakobsson, B., Floberg, L., 1957. The Finite Journal Bearing Considering Vaporization. Chalmers Tekniska Hoegskolas Handlingar, 190:28-101.

[19]Jang, J.Y., Chang, C.C., 1987. Adiabatic solution for a misaligned journal bearing with non-Newtonian lubricants. Tribology International, 20(5):267-275.

[20]Jang, J.Y., Khonsari, M.M., 2010. On the behavior of misaligned journal bearings based on mass-conservative thermohydrodynamic analysis. Journal of Tribology, 132(1):011702.

[21]Keogh, P.S., Gomiciaga, R., Khonsari, M.M., 1997. CFD based design techniques for thermal prediction in a generic two-axial groove hydrodynamic journal bearing. Journal of Tribology, 119(3):428-435.

[22]Li, W., Yang, Y., Sheng, D.R., Chen, J.H., Che, Y.Q., 2011. Nonlinear dynamic analysis of a rotor/bearing/seal system. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 12(1):46-55.

[23]Liu, H.P., Xu, H., Ellison, P.J., Jin, Z.M., 2010. Application of computational fluid dynamics and fluid-structure interaction method to the lubrication study of a rotor-bearing system. Tribology Letters, 38(3):325-336.

[24]Lund, J.W., 1979. Rotor-Bearing Dynamics, Lecture Notes, Technical University of Denmark, Denmark.

[25]Ma, Y.Y., 2008. Performance of dynamically loaded journal bearings lubricated with couple stress fluids considering the elasticity of the liner. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 9(7):916-921.

[26]McKee, S.A., McKee, T.R., 1932. Pressure distribution in the oil film of journal bearings. Transactions of the ASME, 54:149-165.

[27]Meruane, V., Pascual, R., 2008. Identification of nonlinear dynamic coefficients in plain journal bearings. Tribology International, 41(8):743-754.

[28]Mokhtar, M.O.A., Safar, Z.S., Abd-EI-Rahman, M.A.M., 1985. An adiabatic solution of misalignment journal bearings. ASME Journal of Lubrication Technology, 107(2):263-267.

[29]Ngondi, E.M., Grönsfelder, T., Nordmann, R., 2010. Mesh movement method for transient simulation of annular cavities: application to prediction of fluid forces in squeeze film dampers. Tribology Transactions, 53(3):440-451.

[30]Pierre, I., Bouyer, J., Fillon, M., 2004. Thermohydrodynamic behavior of misaligned plain journal bearings: theoretical and experimental approaches. Tribology Transactions, 47(4):594-604.

[31]Pinkus, O., Bupara, S.S., 1979. Analysis of misaligned grooved journal bearings. Journal of Lubrication Technology, 101(4):503-509.

[32]Qiu, Z.L., Tieu, A.K., 1995. Misalignment effect on the static and dynamic characteristics of hydrodynamic journal bearings. Journal of Tribology, 117(4):717-723.

[33]Qiu, Z.L., Tieu, A.K., 1996. Experimental study of freely alignable journal bearings-part 2: dynamic characteristics. Journal of Tribology, 118(3):503-508.

[34]Singhal, A.K., Athavale, M.M., Li, H.Y., Jiang, Y., 2002. Mathematical basis and validation of the full cavitation model. Journal of Fluids Engineering, 124(3):617-624.

[35]Smalley, A.J., McCallion, H., 1966. The Effect of Journal Misalignment on the Performance of a Journal Bearing Under Steady Running Conditions. Proceedings of Institution of Mechanical Engineers, 181(Pt.3B):45-54.

[36]Sun, J., Deng, M., Fu, Y.H., Gui, C.L., 2010. Thermohydrodynamic lubrication analysis of misaligned plain journal bearing with rough surface. Journal of Tribology, 132(1):011704.

[37]Sun, J., Gui, C.L., 2004. Hydrodynamic lubrication analysis of journal bearing considering misalignment caused by shaft deformation. Tribology International, 37(10):841-848.

[38]Sun, J., Gui, C.L., Li, Z.Y., 2005. Influence of journal misalignment caused by shaft deformation under rotational load on performance of journal bearing. Journal of Engineering Tribology, 219(4):275-283.

[39]Sun, J., Gui, C.L., Wang, J.F., 2007. Research on shaft strength considering offsetting distribution of film pressure of journal bearing in shaft-bearing system. Journal of Mechanical Engineering Science, 221(1):99-107.

[40]Tieu, A.K., Qiu, Z.L., 1996. Experimental study of freely alignable journal bearings-part 1: static characteristics. ASME Journal of Tribology, 118(3):498-502.

[41]Vijayaraghavan, D., Keith, T.G., 1989. Effect of cavitation on the performance of a grooved misaligned journal bearing. Wear, 134(2):377-397.

[42]Vijayaraghavan, D., Keith, T.G., 1990. Analysis of a finite misaligned journal bearing considering cavitation and starvation effects. Journal of Tribology, 112(1):60-67.

[43]Xing, C.G., Braun, M.J., Li, H.M., 2009. A three-dimensional Navier-Stokes-Based numerical model for squeeze-film dampers. Part 1-effects of gaseous cavitation on pressure distribution and damping coefficients without considering of inertia. Tribology Transactions, 52(5):680-694.

[44]Zheng, S.Y., 1993. Lernende Regelung Für Rotorsysteme. Fortschritt-Berichte VDI, VDI-Verlag, Duesseldorf, Germany, p.1-24 (in German).

[45]Zheng, S.Y., Liu, S.L., 2005. On-line elimination of oil whip. Chinese Journal of Mechanical Engineering, 18(2):228-231.

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