A theoretical study of a submerged oil journal bearing is made considering surface roughness and thermal effects. The total load-supporting ability under such condition is due to the thermohydrodynamic as well as the asperity contact pressure. The effect of surface roughness and viscosity-temperature dependency on hydrodynamic pressure has been found by solving the average Reynolds equation, energy equation and heat conduction equations simultaneously. The cavitation model of Jacobsson-Floberg has been modified to take the surface roughness effects into consideration. A parametric study of steady-state behavior has been carried out. Finally, the isothermal, thermohydrodynamic, and contact loads for a model bearing have been calculated, assuming the surface height distribution as Gaussian.

Issue Section:
Research Papers
Topics:
Journal bearings, Surface roughness, Thermohydrodynamics, Pressure, Stress, Bearings, Cavitation, Heat conduction, Steady state, Temperature, Temperature effects, Viscosity
1.
Boncompain
R.
,
Fillon
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, and
Frene
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,
1986
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Analysis of Thermal Effects in Hydrodynamic Bearings
,”
ASME JOURNAL OF TRIBOLOGY
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108
, pp.
219
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224
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2.
Christensen
H.
, and
Tonder
K.
,
1973
, “
The Hydrodynamic Lubrication of Rough Journal Bearings
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
95
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166
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171
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3.
Dowson
D.
,
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A Generalized Reynolds Equation for Fluid Film Lubrication
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170
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4.
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H. G.
,
1979
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A General Theory of Laminar Lubrication With Reynolds Roughness
,”
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, Vol.
101
, 1979, pp.
8
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14
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5.
Ezzat
H.
, and
Rhode
S.
,
1974
, “
Thermal Transients in Finite Slider Bearings
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
96
, pp.
315
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320
.
6.
Ferron
J.
,
Frene
J.
, and
Boncompain
R.
,
1983
, “
A Study of the Thermohydrodynamic Performance of a Plain Journal Bearing-Comparison Between Theory and Experiments
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
105
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422
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428
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7.
Greenwood
J. A.
, and
Tripp
J. H.
,
1970–71
, “
The Contact of Two Nominally Flat Rough Surfaces
,”
Proc. Inst. Mech. Engg.
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185
, pp.
625
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633
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8.
Jacobsson, B., and Floberg, L., 1965, “The Finite Journal Bearing, Considering Vaporization,” Trans. Chalmers Univ. Technol., Gothenburg.
9.
Jang
J. Y.
,
Cheng
M. J.
, and
Lin
J. F.
,
1991
, “
Adiabatic Solutions of Finite Width Journal Bearings With Rough Surfaces
,”
Tribology Int.
, Vol.
24
, pp.
373
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380
.
10.
Kicinski
J.
,
1987
, “
Influence of the Flow Pre-history in the Cavitation Zone on the Dynamic Characteristics of Slide Bearings
,”
Wear
, Vol.
111
, pp.
289
–
311
.
11.
Majumdar
B. C.
,
1975
, “
The Thermohydrodynamic Solution of Oil Journal Bearings
,”
Wear
, Vol.
31
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287
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294
.
12.
Majumdar, B. C., and Hamrock, B. J., 1981, “Surface Roughness Effects on Finite Oil Journal Bearings,” NASA Tech. Memo. 82639.
13.
McCallion
H.
,
Yousif
F.
, and
Lloyd
T.
,
1970
, “
The Analysis of Thermal Effects in a Full Journal Bearing
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
92
, pp.
578
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585
.
14.
Nayak
P. R.
,
1971
, “
Random Process Model of Rough Surfaces
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
93
, pp.
398
398
.
15.
Ott
H. H.
, and
Paradissiadis
G.
,
1988
, “
Thermohydrodynamic Analysis of Journal Bearings Considering Cavitation and Reverse Flow
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
110
, pp.
439
–
447
.
16.
Patir
N.
, and
Cheng
H. S.
,
1979
, “
Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
101
, pp.
220
–
230
.
17.
Ritchmeyer, R. D., 1957, Difference Methods for Initial Value Problems, Interscience, New York, pp. 101.
18.
Teale
J. L.
, and
Lebeck
A. O.
,
1980
, “
An Evaluation of the Average Flow Model for Surface Roughness Effects in Lubrication
,”
ASME JOURNAL OF LUBRICATION TECHNOLOGY
, Vol.
102
, pp.
360
–
367
.
19.
Whitehouse
D. J.
, and
Archard
J. F.
,
1970
, “
The Properties of Random Surfaces of Significance in their Contact
,”
Proc. R. Soc., London
, Vol. A
316
, pp.
97
–
121
.
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