This paper extends the theory originally developed by Tichy (Tichy and Bou-Said, 1991, Hydrodynamic Lubrication and Bearing Behavior With Impulsive Loads,” STLE Tribol. Trans. 34, pp. 505–512) for impulsive loads to high reduced Reynolds number lubrication. The incompressible continuity equation and Navier-Stokes equations, including inertia terms, are simplified using an averaged velocity approach to obtain an extended form of short bearing Reynolds equation which applies to both laminar and turbulent flows. A full kinematic analysis of the short journal bearing is developed. Pressure profiles and linearized stiffness, damping and mass coefficients are calculated for different operating conditions. A time transient solution is developed. The change in the rotor displacements when subjected to unbalance forces is explored. Several comparisons between conventional Reynolds equation solutions and the extended Reynolds number form with temporal inertia effects are presented and discussed. In the specific cases considered in this paper, the primary conclusion is that the turbulence effects are significantly more important than inertia effects.
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July 2012
Hydrodynamic Lubrication
Temporal and Convective Inertia Effects in Plain Journal Bearings With Eccentricity, Velocity and Acceleration
Saeid Dousti,
Saeid Dousti
Research Assistant
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
e-mail: sd3tx@virginia.edu
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904
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Jianming Cao,
Jianming Cao
Research Assistant
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
e-mail: jc3wn@virginia.edu jc3wn@virginia.edu
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904
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Amir Younan,
Amir Younan
Research Associate
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
e-mail: aay7n@virginia.edu
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904
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Paul Allaire,
Paul Allaire
Mac Wade Professor
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
e-mail: pea@virginia.edu
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904
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Tim Dimond
Tim Dimond
Research Associate
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
e-mail: twd5c@virginia.edu
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904
Search for other works by this author on:
Saeid Dousti
Research Assistant
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904e-mail: sd3tx@virginia.edu
Jianming Cao
Research Assistant
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904e-mail: jc3wn@virginia.edu jc3wn@virginia.edu
Amir Younan
Research Associate
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904e-mail: aay7n@virginia.edu
Paul Allaire
Mac Wade Professor
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904e-mail: pea@virginia.edu
Tim Dimond
Research Associate
Rotating Machinery and Controls Laboratory, Department of Mechanical and Aerospace Engineering,
University of Virginia
, 122 Engineer’s Way, Charlottesville, VA 22904e-mail: twd5c@virginia.edu
J. Tribol. Jul 2012, 134(3): 031704 (8 pages)
Published Online: June 19, 2012
Article history
Received:
July 19, 2011
Revised:
May 17, 2012
Online:
June 19, 2012
Published:
June 19, 2012
Citation
Dousti, S., Cao, J., Younan, A., Allaire, P., and Dimond, T. (June 19, 2012). "Temporal and Convective Inertia Effects in Plain Journal Bearings With Eccentricity, Velocity and Acceleration." ASME. J. Tribol. July 2012; 134(3): 031704. https://doi.org/10.1115/1.4006928
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