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Research Papers: Gas Turbines: Structures and Dynamics

Development and Validation of a Three-Dimensional Computational Fluid Dynamics Analysis for Journal Bearings Considering Cavitation and Conjugate Heat Transfer

[+] Author and Article Information
Yin Song

Key Laboratory for Thermal Science and Power
Engineering of Ministry of Education,
Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China
e-mail: songyin@tsinghua.edu.cn

Chun-wei Gu

Key Laboratory for Thermal Science and Power
Engineering of Ministry of Education,
Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China
e-mail: gcw@mail.tsinghua.edu.cn

1Corresponding author.

Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 10, 2014; final manuscript received April 30, 2015; published online June 9, 2015. Assoc. Editor: Jerzy T. Sawicki.

J. Eng. Gas Turbines Power 137(12), 122502 (Jun 09, 2015) (10 pages) Paper No: GTP-14-1277; doi: 10.1115/1.4030633 History: Received June 10, 2014

Computational fluid dynamics (CFD) analysis, which solves the full three-dimensional (3D) Navier–Stokes equations, has been recognized as having promise in providing a more detailed and accurate analysis for oil-film journal bearings than the traditional Reynolds analysis, although there are still challenging issues requiring further investigation, such as the modeling of cavitation and the modeling of conjugate heat transfer effects in the CFD analysis of bearings. In this paper, a 3D CFD method for the analysis of journal bearings considering the above two effects has been developed; it employs three different cavitation models, including the Half-Sommerfeld model, a vaporous cavitation model, and a gaseous cavitation model. The method has been used to analyze a two-groove journal bearing and the results are validated with experimental measurements and the traditional Reynolds solutions. It is found that the CFD method which considers the conjugate heat transfer and employs the gaseous cavitation model gives better predictions of both bearing load and temperature than either the traditional Reynolds solution or CFD with other cavitation models. The CFD results also show strong recirculation of the fresh oil in the grooves, which has been neglected in the traditional Reynolds solution. The above results show conclusively that the present 3D CFD method considering the conjugate heat transfer and employing the gaseous cavitation model provides an efficient tool for more detailed and accurate analysis for bearing performance.

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References

Uhkoetter, S. , Wiesche, S. A. D. , Kursch, M. , and Beck, C. , 2012, “Development and Validation of a Three-Dimensional Multiphase Flow Computational Fluid Dynamics Analysis for Journal Bearings in Steam and Heavy Duty Gas Turbines,” ASME J. Eng. Gas Turbines Power, 134(10), p. 102504. [CrossRef]
Brajdic-Mitidieri, P. , Gosman, A. D. , Ioannides, E. , and Spikes, H. A. , 2005, “CFD Analysis of a Low Friction Pocketed Pad Bearing,” ASME J. Tribol., 127(4), pp. 803–812. [CrossRef]
Medwell, J. O. , Gethin, D. T. , and Taylor, C. , 1987, “A Finite Element Analysis of the Navier–Stokes Equations Applied to High Speed Thin Film Lubrication,” ASME J. Tribol., 109(1), pp. 71–76. [CrossRef]
Tucker, P. , and Keogh, P. , 1995, “A Generalized Computational Fluid Dynamics Approach for Journal Bearing Performance Prediction,” Proc. Inst. Mech. Eng., Part J, 209(2), pp. 99–108. [CrossRef]
Tucker, P. G. , and Keogh, P. S. , 1996, “On the Dynamic Thermal State in a Hydrodynamic Bearing With a Whirling Journal Using CFD Techniques,” ASME J. Tribol., 118(2), pp. 356–363. [CrossRef]
Keogh, P. S. , Gomiciaga, R. , and Khonsari, M. M. , 1997, “CFD Based Design Techniques for Thermal Prediction in a Generic Two-Axial Groove Hydrodynamic Journal Bearing,” ASME J. Tribol., 119(3), pp. 428–435. [CrossRef]
Nassab, S. G. , and Moayeri, M. , 2002, “Three-Dimensional Thermohydrodynamic Analysis of Axially Grooved Journal Bearings,” Proc. Inst. Mech. Eng., Part J, 216(1), pp. 35–47. [CrossRef]
Solghar, A. A. , and Gandjalikhan Nassab, S. A. , 2013, “The Investigation of Thermohydrodynamic Characteristic of Single Axial Groove Journal Bearings With Finite Length by Using CFD Techniques,” Int. J. Comput. Methods, 10(5), p. 1350031. [CrossRef]
Guo, Z. , Hirano, T. , and Kirk, R. G. , 2005, “Application of CFD Analysis for Rotating Machinery—Part I: Hydrodynamic, Hydrostatic Bearings and Squeeze Film Damper,” ASME J. Eng. Gas Turbines Power, 127(2), pp. 445–451. [CrossRef]
Gertzos, K. P. , Nikolakopoulos, P. G. , and Papadopoulos, C. A. , 2008, “CFD Analysis of Journal Bearing Hydrodynamic Lubrication by Bingham Lubricant,” Tribol. Int., 41(12), pp. 1190–1204. [CrossRef]
Liu, H. , Xu, H. , Zhang, Y. , Ji, H. , Ge, Y. , Ellison, P. , and Jin, Z. , 2009, “The Influence of Sea Water in Oil Emulsion on Bearing Performance,” Proc. Inst. Mech. Eng., Part J, 223(J3), pp. 457–468. [CrossRef]
Liu, H. , Xu, H. , Ellison, P. J. , and Jin, Z. M. , 2010, “Application of Computational Fluid Dynamics and Fluid–Structure Interaction Method to the Lubrication Study of a Rotor-Bearing System,” Tribol. Lett., 38(3), pp. 325–336. [CrossRef]
Li, Q. , Yu, G. C. , Liu, S. L. , and Zheng, S. Y. , 2012, “Application of Computational Fluid Dynamics and Fluid Structure Interaction Techniques for Calculating the 3D Transient Flow of Journal Bearings Coupled With Rotor Systems,” Chin. J. Mech. Eng., 25(5), pp. 926–932. [CrossRef]
Schmidt, M. , Stücke, P. , and Nobis, M. , 2011, “Numerical Meshing Issues for Three-Dimensional Flow Simulation in Journal Bearings,” 3rd Micro and Nano Flows Conference, Thessaloniki, Greece, pp. Aug. 22–24.
Braun, M. , and Hannon, W. , 2010, “Cavitation Formation and Modelling for Fluid Film Bearings: A Review,” Proc. Inst. Mech. Eng., Part J, 224(9), pp. 839–863. [CrossRef]
ESI Group, 2006, CFD-ACE+ V2006 Modules Manual, ESI-US, R. D., Huntsville, AL.
Swales, P. , 1974, “A Review of Cavitation Phenomena in Engineering Situations,” 1st Leeds–Lyon Symposium on Tribology, Leeds, UK, Sept., D. Dowson , M. Priest , G. Dalmaz , and A. Lubrecht , eds., pp. 3–9.
Dowson, D. , and Taylor, C. , 1974, “Fundamental Aspects of Cavitation in Bearings,” 1st Leeds–Lyon Symposium on Tribology, Leeds, UK, Sept., D. Dowson , M. Priest , G. Dalmaz , and A. Lubrecht , eds., pp. 15–28.
Song, Y. , Li, X. S. , and Gu, C. W. , 2010, “Cavitation Model for Oil Film Bearings,” J. Tsinghua Univ. (Sci. Technol.), 50(7), pp. 1047–1052.
Li, X. S. , Song, Y. , Hao, Z. R. , and Gu, C. W. , 2012, “Cavitation Mechanism of Oil-Film Bearing and Development of a New Gaseous Cavitation Model Based on Air Solubility,” ASME J. Tribol., 134(3), p. 031701. [CrossRef]
Lund, J. , and Tonnesen, J. , 1984, “An Approximate Analysis of the Temperature Conditions in a Journal Bearing. Part II: Application,” ASME J. Tribol., 106(2), pp. 237–244. [CrossRef]
Plesset, M. S. , 1949, “The Dynamics of Cavitation Bubbles,” ASME J. Appl. Mech., 16, pp. 277–282.
Bakir, F. , Rey, R. , Gerber, A. , Belamri, T. , and Hutchinson, B. , 2004, “Numerical and Experimental Investigations of the Cavitating Behavior of an Inducer,” Int. J. Rotating Mach., 10(1), pp. 15–25. [CrossRef]
Gehannin, J. , Arghir, M. , and Bonneau, O. , 2009, “Evaluation of Rayleigh–Plesset Equation Based Cavitation Models for Squeeze Film Dampers,” ASME J. Tribol., 131(2), p. 024501. [CrossRef]
Guo, G. , Fan, Y. , and Jia, F. , 2008, “Solubility of Air in Dimethyl Silicone and Hydraulic Oils,” Acta Phys. Chim. Sin., 24(7), pp. 1225–1232.
ANSYS, Inc., 2009, ANSYS 12.1 Documentation, ANSYS Inc., Canonsburg, PA.
Knight, J. D. , and Niewiarowski, A. J. , 1990, “Effects of Two Film Rupture Models on the Thermal Analysis of a Journal Bearing,” ASME J. Tribol., 112(2), pp. 183–188. [CrossRef]
Stefani, F. , and Rebora, A. , 2009, “Steadily Loaded Journal Bearings: Quasi-3D Mass–Energy-Conserving Analysis,” Tribol. Int., 42(3), pp. 448–460. [CrossRef]
Diaz, S. , 1999, “The Effect of Air Entrapment on the Performance of Squeeze Film Dampers: Experiments and Analysis,” Ph.D. thesis, Texas A&M University, College Station, TX.
Bayada, G. , and Chupin, L. , 2013, “Compressible Fluid Model for Hydrodynamic Lubrication Cavitation,” ASME J. Tribol., 135(4), p. 041702. [CrossRef]
Lund, J. W. , and Hansen, P. K. , 1984, “An Approximate Analysis of the Temperature Conditions in a Journal Bearing. Part I: Theory,” ASME J. Tribol., 106(2), pp. 228–236. [CrossRef]
Heshmat, H. , and Pinkus, O. , 1986, “Mixing Inlet Temperatures in Hydrodynamic Bearings,” ASME J. Tribol., 108(2), pp. 231–244. [CrossRef]
Gethin, D. , 1988, “A Finite Element Approach to Analysing Thermohydrodynamic Lubrication in Journal Bearings,” Tribol. Int., 21(2), pp. 67–75. [CrossRef]
Gethin, D. , 1996, “Modelling the Thermohydrodynamic Behaviour of High Speed Journal Bearings,” Tribol. Int., 29(7), pp. 579–596. [CrossRef]
Dzodzo, M. , Braun, M. , and Hendricks, R. , 1996, “Pressure and Flow Characteristics in a Shallow Hydrostatic Pocket With Rounded Pocket/Land Joints,” Tribol. Int., 29(1), pp. 69–76. [CrossRef]

Figures

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Fig. 1

Calculation domain

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Fig. 4

Circumferential temperature profiles calculated by different meshes

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Fig. 5

Definition of the circumferential coordinates

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Fig. 6

Measured and calculated circumferential profiles for the bearing wall temperature (case 1)

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Fig. 2

Mesh for the fluid domain

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Fig. 3

Mesh for the solid domain

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Fig. 7

Distributions of void fraction predicted by CFD (a) HS, (b) vapor, and (c) gaseous

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Fig. 8

Distributions of bearing temperature predicted by CFD (a) HS, (b) vapor, and (c) gaseous

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Fig. 9

Calculated circumferential profiles for the oil-film pressure (case 1)

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Fig. 10

Measured and calculated circumferential profiles for the bearing wall temperature (case 2)

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Fig. 11

Measured and calculated circumferential profiles for the oil-film pressure (case 3)

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Fig. 12

Streamlines in the oil feeding grooves: (a) the left groove at 180 deg and (b) the right groove at 0 deg

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Fig. 13

Oil temperature in the middle section of oil feeding grooves: (a) the left groove at 180 deg and (b) the right groove at 0 deg

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