A general solution scheme to account the surface roughness and the cross-film viscosity variation of lubricant due to its non-Newtonian behavior and rise in fluid-film temperature for the analysis of fluid-film bearings is presented. The combined influence of surface roughness, non-Newtonian behavior of lubricant, and thermal effects on the performance of a hole-entry hybrid journal bearing system has been investigated. The surface roughness, especially stationary roughness (i.e., rough bearing and smooth journal) with a transverse pattern was found to partially compensate for the loss in load-carrying capacity due to the thermal and/or non-Newtonian behavior of lubricant effects. It limits 18.86% loss in load-carrying capacity due to the thermal effect to only 1.6% and 33.99% loss due to the combined influence of non-Newtonian lubricant and thermal effect to 16.76%.
Issue Section:
Technical Papers
1.
Rowe
, W. B.
, Xu
, S. X.
, Chong
, F. S.
, and Weston
, W.
, 1982, “Hybrid Journal Bearings With Particular Reference to Hole-Entry Configuration
,” Tribol. Int.
0301-679X, 15
(6
), pp. 339
–348
.2.
Christensen
, H.
, 1969–1970, “Stochastic Models for Hydrodynamic Lubrication of Rough Surfaces
,” Proc. Inst. Mech. Eng.
0020-3483, 184
(55
), pp. 1013
–1026
.3.
Patir
, N.
, and Cheng
, H. S.
, 1978, “An Average Flow Model for Determining Effect of Three-Dimensional Roughness on Partial Hydrodynamic Lubrication
,” ASME J. Lubr. Technol.
0022-2305, 100
, pp. 12
–17
.4.
Patir
, N.
, and Cheng
, H. S.
, 1979, “Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces
,” ASME J. Lubr. Technol.
0022-2305, 101
, pp. 220
–230
.5.
Zhang
, C.
, Jiang
, J. A.
, and Cheng
, H. S.
, 2000, “A Study of Dynamically Loaded Finite Journal Bearings in Mixed Lubrication Using a Transient Thermohydrodynamic Analysis
,” STLE Tribol. Trans.
1040-2004, 43
(3
), pp. 459
–464
.6.
Zhang
, C.
, and Cheng
, H. S.
, 2000, “Transient Non-Newtonian Thermohydrodynamic Mixed Lubrication of Dynamically Loaded Journal Bearings
,” ASME J. Tribol.
0742-4787, 122
, pp. 156
–161
.7.
Zhang
, C.
, 2002, “TEHD Behavior of Non-Newtonian Dynamically Loaded Journal Bearings in Mixed Lubrication for Direct Problem
,” ASME J. Tribol.
0742-4787, 124
(1
), pp. 178
.8.
Li
, W.-L.
, Weng
, C.-I.
, and Hwang
, C.-C.
, 1997, “An Average Reynolds Equation for Non-Newtonian Fluid With Application to the Lubrication of the Magnetic Head-Disk Interface
,” STLE Tribol. Trans.
1040-2004, 40
(1
), pp. 111
–119
.9.
Li
, W.-L.
, Weng
, C.-I.
, and Lue
, J.-I.
, 1996, “Surface Roughness Effects in Journal Bearings With Non-Newtonian Lubricants
,” STLE Tribol. Trans.
1040-2004, 39
(4
), pp. 819
–826
.10.
Wang
, P.
, Keith
, T. G.
, and Vaidyanathan
, K.
, 2002, “Combined Surface Roughness Pattern and Non-Newtonian Effects on the Performance of Dynamically Loaded Journal Bearings
,” STLE Tribol. Trans.
1040-2004, 45
(1
), pp. 1
–10
.11.
Ramesh
, J.
, Majumdar
, B. C.
, and Rao
, N. S.
, 1997, “Thermohydrodynamic Analysis of Submerged Oil Journal Bearing Considering Surface Roughness Effects
,” ASME J. Tribol.
0742-4787, 119
(1
), pp. 100
–106
.12.
Shi
, F.
, and Wang
, Q.
, 1998, “A Mixed-TEHD Model for Journal-Bearing Conformal Contacts—Part I: Model Formulation and Approximation of Heat Transfer Considering Asperity Contact
,” ASME J. Tribol.
0742-4787, 120
, pp. 198
–205
.13.
Nagaraju
, T.
, Sharma Satish
, C.
, and Jain
, S. C.
, 2002, “Influence of Surface Roughness Effects on the Performance of Non-Recessed Hybrid Journal Bearings
,” Tribol. Int.
0301-679X, 35
(7
), pp. 467
–487
.14.
Nagaraju
, T.
, Sharma Satish
, C.
, and Jain
, S. C.
, 2005, “The Stability Margin of a Roughened Hole-Entry Hybrid Journal Bearing System
,” STLE Tribol. Trans.
1040-2004, 48
(1
), pp. 140
–146
.15.
Sharma Satish
, C.
, Nagaraju
, T.
, and Jain
, S. C.
, 2002, “Combined Influence of Journal Misalignment and Surface Roughness on the Performance of an Orifice Compensated Non-Recessed Hybrid Journal Bearing
,” STLE Tribol. Trans.
1040-2004, 45
(4
), pp. 457
–463
.16.
Nagaraju
, T.
, Sharma Satish
, C.
, and Jain
, S. C.
, 2003, “Performance of Externally Pressurized Non-Recessed Roughened Journal Bearing System Operating With Non-Newtonian Lubricant
,” STLE Tribol. Trans.
1040-2004, 46
(3
), pp. 404
–413
.17.
Sharma Satish
, C.
, Nagaraju
, T.
, and Jain
, S. C.
, 2004, “Performance of Orifice Compensated Hole-Entry Hybrid Journal Bearing System Considering Surface Roughness and Thermal Effects
,” STLE Tribol. Trans.
1040-2004, 47
(4
), pp. 557
–566
.18.
Dowson
, D.
, 1962, “A Generalized Reynolds Equation For Fluid Film Lubrication
,” Int. J. Mech. Sci.
0020-7403, 4
, pp. 159
–170
.19.
Xu
, S.
, 1994, “Experimental Investigation of Hybrid Bearings
,” STLE Tribol. Trans.
1040-2004, 37
(2
), pp. 285
–292
.Copyright © 2007
by American Society of Mechanical Engineers
You do not currently have access to this content.
