Research Papers: Gas Turbines: Structures and Dynamics

Effect of Recess Shape on the Performance of a High-Speed Hybrid Journal Bearing

[+] Author and Article Information
Alexandrina Untaroiu

Laboratory for Turbomachinery
and Components,
Department of Biomedical Engineering
and Mechanics,
Virginia Tech,
Norris Hall, Room 342,
495 Old Turner Street,
Blacksburg, VA 24061
e-mail: alexu@vt.edu

Gen Fu

Laboratory for Turbomachinery
and Components,
Department of Biomedical Engineering
and Mechanics,
Virginia Tech,
Norris Hall, Room 107,
495 Old Turner Street,
Blacksburg, VA 24061
e-mail: gen8@vt.edu

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 February 17, 2016; final manuscript received April 19, 2017; published online June 21, 2017. Assoc. Editor: Philip Bonello.

J. Eng. Gas Turbines Power 139(11), 112501 (Jun 21, 2017) (10 pages) Paper No: GTP-16-1076; doi: 10.1115/1.4036946 History: Received February 17, 2016; Revised April 19, 2017

Hybrid bearings are getting more and more attention because of their ability to provide both hydrodynamic support for high-speed rotors and hydrostatic lift in low-speed conditions such as during startup. Hybrid bearings are typically designed with recess grooves to modify the pressure profile and as a result to enable the lift capacity of the bearing under various operating conditions. The literature has shown that the size and shape of the recesses have not been systematically and quantitatively studied in detail. The goal of this study is to build a 3D analytical model for a hybrid-recessed bearing with five pockets and provide a comprehensive analysis for the effect of recess geometry on the overall performance of the bearing. In this study, a baseline model selected from the literature is constructed and validated using the ANSYS cfx computational fluid dynamics software package. A sensitivity analysis of the design variables on the performance of the bearing has been performed using design expert software. The length, width, and depth of the recess as well as the diameter and location of the five inlet ports have been selected as design variables. A multivariable and multi-objective genetic algorithm has also been solved using isight software with the goal of optimizing the geometry of the recess to maximize load capacity while minimizing bearing power loss from friction torque. The results of the baseline model show reasonable agreement with the experimental data published in the literature. The regression models for lift force and friction torque were both found to be statistically significant and accurate. It has been shown that friction torque decreases as the length of recess in the circumferential direction increases. The results showed that the load capacity is highly correlated to the diameter of the orifice, d. These results provide a deeper understanding of the relationship between the shape of the recess and bearing performance and are expected to be useful in practical hybrid-bearing design.

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Khonsari, M. M., and Booser, E. R., 2001, Applied Tribology, Bearing Design and Lubrication, Wiley, New York.
Chen, X.-D. , and He, X.-M. , 2006, “ The Effect of the Recess Shape on Performance Analysis of the Gas-Lubricated Bearing in Optical Lithography,” Tribol. Int., 39(11), pp. 1336–1341. [CrossRef]
San Andrés, L. , 1990, “ Turbulent Hybrid Bearings With Fluid Inertia Effects,” ASME J. Tribol., 112(4), pp. 699–707. [CrossRef]
San Andres, L. , 1990, “ Approximate Analysis of Turbulent Hybrid Bearings. Static and Dynamic Performance for Centered Operation,” ASME J. Tribol., 112(4), pp. 629–698.
San Andres, L. , 1991, “ Effect of Eccentricity on the Force Response of a Hybrid Bearing,” Tribol. Trans., 34(4), pp. 537–544. [CrossRef]
Franchek, N. , Childs, D. , and San Andres, L. , 1995, “ Theoretical and Experimental Comparisons for Rotordynamic Coefficients of a High-Speed, High-Pressure, Orifice-Compensated Hybrid Bearing,” ASME J. Tribol., 117(290), pp. 285–290. [CrossRef]
Mosher, P. , and Childs, D. , 1998, “ Theory Versus Experiment for the Effects of Pressure Ratio on the Performance of an Orifice-Compensated Hybrid Bearing,” ASME J. Vib. Acoust., 120(4), pp. 930–936. [CrossRef]
Braun, M. J. , and Dzodzo, M. , 1995, “ Effects of Hydrostatic Pocket Shape on the Flow Pattern and Pressure Distribution,” Int. J. Rotating Mach., 1(3–4), pp. 225–235.
Helene, M. , Arghir, M. , and Frene, J. , 2003, “ Numerical Study of the Pressure Pattern in a Two-Dimensional Hybrid Journal Bearing Recess, Laminar, and Turbulent Flow Results,” ASME J. Tribol., 125(2), pp. 283–290. [CrossRef]
Helene, M. , Arghir, M. , and Frene, J. , 2003, “ Numerical Three-Dimensional Pressure Patterns in a Recess of a Turbulent and Compressible Hybrid Journal Bearing,” ASME J. Tribol., 125(2), pp. 301–308. [CrossRef]
Singh, N. , Sharma, S. C. , Jain, S. C. , and Sanjeeva Reddy, S. , 2004, “ Performance of Membrane Compensated Multirecess Hydrostatic/Hybrid Flexible Journal Bearing System Considering Various Recess Shapes,” Tribol. Int., 37(1), pp. 11–24. [CrossRef]
Chen, C.-H. , Kang, Y. , Chang, Y.-P. , Lee, H.-H. , and Shen, P.-C. , 2005, “ Influence of Recess Depth on the Stability of the Jeffcott Rotor Supported by Hybrid Bearings With Orifice Restrictor,” Ind. Lubr. Tribol., 57(1), pp. 41–51. [CrossRef]
Dwivedi, V. K. , Chand, S. , and Pandey, K. N. , 2013, “ Effect of Number and Size of Recess on the Performance of Hybrid (Hydrostatic/Hydrodynamic) Journal Bearing,” Procedia Eng., 51, pp. 810–817. [CrossRef]
Rajput, A. K. , and Sharma, S. C. , 2014, “ A Study of Capillary-Compensated Geometrically Imperfect Six-Pocket Hybrid Journal Bearing of Various Geometric Shapes of Recess,” Proc. Inst. Mech. Eng., Part J, 228(2), pp. 170–186. [CrossRef]
Wang, L. , Pei, S. , Xiong, X. , and Xu, H. , 2014, “ Investigation of the Combined Influence of Turbulence and Thermal Effects on the Performance of Water-Lubricated Hybrid Bearings With Circumferential Grooves and Stepped Recesses,” Proc. Inst. Mech. Eng., Part J, 228(1), pp. 53–68. [CrossRef]
Montusiewicz, J. , and Osyczka, A. , 1997, “ Computer Aided Optimum Design of Machine Tool Spindle Systems With Hydrostatic Bearings,” Proc. Inst. Mech. Eng., Part B, 211(1), pp. 43–51. [CrossRef]
Kazama, T. , 2000, “ Optimum Design of Hydrostatic Spherical Bearings in Fluid Film Lubrication,” ASME J. Tribol., 122(4), pp. 866–869. [CrossRef]
Solmaz, E. , Babalik, F. C. , and Öztürk, F. , 2003, “ Optimization of Circular Hydrostatic Axial Journal Bearings Using a Multicriteria Approach,” Proc. Inst. Mech. Eng., Part J, 217(3), pp. 235–241. [CrossRef]
Shih, M. C. , and Shie, J. S. , 2013, “ Recess Design and Dynamic Control of an Active Compensating Hydrostatic Bearing,” J. Adv. Mech. Des., 7(4), pp. 706–721.
Bakker, O. J. , and van Ostayen, R. A. J. , 2010, “ Recess Depth Optimization for Rotating, Annular, and Circular Recess Hydrostatic Thrust Bearings,” ASME J. Tribol., 132(1), p. 011103. [CrossRef]
Canbuylut, F. , Sinanoglu, C. , Yildirim, S. , and Koc, E. , 2004, “ Design of Neural Network Model for Analysing Hydrostatic Circular Recessed Bearings With Axial Piston Pump Slipper,” Ind. Lubr. Tribol., 56(5), pp. 288–299. [CrossRef]
Momeni, E. , Nazir, R. , Jahed Armaghani, D. , and Maizir, H. , 2014, “ Prediction of Pile Bearing Capacity Using a Hybrid Genetic Algorithm-Based ANN,” Measurement, 57, pp. 122–131. [CrossRef]
Franchek, N. M. , and Childs, D. W. , 1994, “ Experimental Test Results for Four High-Speed, High-Pressure, Orifice-Compensated Hybrid Bearings,” ASME J. Tribol., 116(1), pp. 147–153. [CrossRef]
Rowe, W. B. , 1983, Hydrostatic and Hybrid Bearing Design, Butterworth, Cambridge, UK.
Ghose, M. K. , and Majumdar, B. C. , 1980, “ Design of Multi Recess Hydrostatic Oil Journal Bearings,” Tribol. Int., 13(2), pp. 73–78. [CrossRef]
ANSYS, 2016, “ Ansys V16.2 Documentation, 6-57,” ANSYS Inc., Canonsburg, PA.
Viana, F. A. C. , 2013, “ Things You Wanted to Know About the Latin Hypercube Design and Were Afraid to Ask,” Tenth World Congress on Structural and Multidisciplinary Optimization, Orlando, FL, May 19–24, pp. 1–9. http://www2.mae.ufl.edu/mdo/Papers/5176.pdf
Kennard, R. W. , and Stone, L. A. , 1969, “ Computer Aided Design of Experiments,” Technometrics, 11(1), pp. 137–148. [CrossRef]
Fu, G. , and Untaroiu, A. , 2017, “ An Optimum Design Approach for Textured Thrust Bearing With Elliptical-Shape Dimples Using CFD and DOE Including Cavitation,” ASME J. Eng. Gas Turbines Power, 139(9), p. 092502. [CrossRef]
Liu, C. , Untaroiu, A. , Wood, H. G. , Yan, Q. , and Wei, W. , 2013, “ Parametric Analysis and Optimization of Inlet Deflection Angle in Torque Converters,” ASME J. Fluids Eng., 137(3), p. 031101. [CrossRef]
Watanabe, S. , Hiroyasu, T. , and Miki, M. , 2002, “ NCGA: Neighborhood Cultivation Genetic Algorithm for Multi-Objective Optimization Problems,” Genetic and Evolutionary Computation Conference (GECCO), New York, July 9–13, pp. 458–465. http://www.is.doshisha.ac.jp/~tomo/paper/2002/20020614watanbae.pdf
Fu, G. , and Untaroiu, A. , 2017, “ A Study of the Effect of Various Recess Shapes on Hybrid Journal Bearing Using CFD and Response Surface Method,” ASME J. Fluids Eng., 139(6), p. 061104. [CrossRef]
Untaroiu, A. , Morgan, N. , Hayrapetian, V. , and Schiavello, B. , 2017, “ Dynamic Response Analysis of Balance Drum Labyrinth Seal Groove Geometries Optimized for Minimum Leakage,” ASME J. Vib. Acoust., 139(2), p. 021014. [CrossRef]
Weaver, B. K. , Zhang, Y. , Clarens, A. F. , and Untaroiu, A. , 2015, “ Nonlinear Analysis of Rub Impact in a Three-Disk Rotor and Correction Via Bearing and Lubricant Adjustment,” ASME J. Eng. Gas Turbines Power, 137(9), p. 092504. [CrossRef]
Myers, R. H. , Anderson-Cook, C. M. , and Montgomery, D. C. , 2014, Response Surface Methodology: Process and Product Optimization Using Designed Experiments, Wiley, Hoboken, NJ.


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Fig. 1

Fluid domain of the base model

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Fig. 2

Hybrid-bearing recess parameterization: (a) top view of the recess and (b) side view of the recess

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Fig. 3

Mesh independence study

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Fig. 5

Load capacity versus eccentricity ratio

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Fig. 6

Design points generation

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Fig. 7

Comparison of two optimization techniques: (a) modified method of feasible directions and (b) neighborhood cultivation genetic algorithm

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Fig. 8

Velocity distribution inside the recess: (a) velocity distribution in the center recess and (b) top view of the recess

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Fig. 9

Pareto plots for (a) lift force and (b) friction torque

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Fig. 10

Quality plots of the regression model for lift force: (a) goodness-of-fit and (b) normal plot of residuals

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Fig. 11

Quality plots of the regression model for friction torque: (a) goodness-of-fit and (b) normal plot of residuals

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Fig. 12

Response surface plots of lift force: (a) lift force versus orifice diameter and recess width, (b) lift force versus x and y position of the recess, and (c) lift force versus recess length and depth

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Fig. 13

Response surface plots of friction torque: (a) friction torque versus recess length and depth, (b) friction torque versus y position and width of the recess, and (c) friction torque versus recess length and width

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Fig. 14

Comparison of the (a) baseline and (b) optimal bearing design



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