Numerical analysis of turbulent lubrication in plain full journal bearings

Solghar, Alireza Arab; Nassab, S. A. Gandjalikhan

doi:10.1108/00368791311303456

Cited by 12 publications

(14 citation statements)

References 18 publications

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“…In 2005 Braunetiere [7], show that a number of theories for the turbulent lubrication film exist which are based on various well-established models of turbulent flow. Solghar and Nassab (2013) [8] carry out a study in to assess the turbulent thermohydrodynamic (THD) performance characteristics of an axially grooved finite journal bearing [8,9]. They are mentioned in their research that the bearing of the operating characteristics are significantly changed by increasing the Reynolds number.…”

Section: Turbulent Flow Effect In Plain Bearingmentioning

confidence: 99%

Turbulent Flow Fluid in the Hydrodynamic Plain Bearing to a Non-Textured and Textured Surface

Nadia¹,

Kadda²

2021

Tribology in Materials and Manufacturing - Wear, Friction and Lubrication

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Hydrodynamic bearing are components that provide the guiding in rotation of rotating machines, such as turbines, the reactors. This equipment works under very severe operating conditions: high rotational speed and high radial load. In order to improve the hydrodynamic performance of these rotating machines, the industrialists specialized in the manufacture of hydrodynamic journal bearings, have designed a bearing model with its textured interior surface. The present work is a numerical analysis, carried out to observe the effect of a turbulent fluid flow in a non-textured and textured plain bearing and to thus to see the improvement of the hydrodynamic and tribological performances to a non- textured and textured surface of the plain bearing, under severe operating parameters. The rotational velocity varies from 11,000 to 21,000 rpm and radial load ranging from 2000 N to 9000 N. The numerical analysis is performed by solving the continuity equation of Navier-Stocks, using the finite volume method. The numerical results show that the most important hydrodynamic characteristics such as pressure, flow velocity of the fluid, friction torque, are significant for the textured plain bearing under rotational velocity of 21,000 rpm and radial load 10,000 N compared to obtained for a non-textured plain bearing.

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Section: Turbulent Flow Effect In Plain Bearingmentioning

confidence: 99%

Turbulent Flow Fluid in the Hydrodynamic Plain Bearing to a Non-Textured and Textured Surface

Nadia¹,

Kadda²

2021

Tribology in Materials and Manufacturing - Wear, Friction and Lubrication

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“…Also, in order to assess the impacts of turbulent conditions on the bearing THD performance, a modified low-Re k–ε turbulence model was used. 11–18…”

Section: Introductionmentioning

confidence: 99%

Multiple-relaxation-time lattice Boltzmann method of hydrodynamic lubrication in lemon-bore bearing

Solghar

2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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The lattice Boltzmann method has superiority over conventional computational fluid dynamics methods, particularly for the flow simulations in complex geometries. In the present work, the performance of hydrodynamic lemon-bore (elliptical) journal bearings was investigated with the implementation of the lattice Boltzmann method. The steady-state laminar flow of a homogeneous oil was considered in the computations. A linear interpolation method was exploited to obtain the surface curvatures. The comparison of the results obtained from the proposed methodology with available literature data showed a satisfactory agreement. The effect of geometrical parameters on the hydrodynamic lubrication in an elliptical journal bearing was analyzed. It was found that the ellipticity ratio has profound effects on the bearing load capacity, oil flow rate and bearing power loss.

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“…He found that the fluid inertia has significant influence on THD characteristics of journal bearing for the conditions that the bearing runs under low load, high speed, and large clearance conditions such that the Reynolds lubrication theory is no longer suitable for the prediction of the bearing performance. Arab Solghar and Gandjalikhan Nassab [15][16][17] have dealt with three-dimensional simulation of the flow field of the journal bearings under the turbulent regime. The turbulent Fow within the bearing was modeled exploiting a modified low-Re k-" turbulence model.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional hydrodynamic analysis of journal bearings using lattice Boltzmann method

Solghar

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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The present study deals with numerical simulation of fluid flow within a single-groove journal bearing under laminar regime and steady-state condition. The lattice Boltzmann method was employed to simulate lubricant flow in the bearing. A linear interpolation method was implemented to satisfy the no-slip condition on the bearing boundaries. The validation with previously published data reveals that the present methodology can evaluate the flow field of journal bearings with an acceptable accuracy. Also, since the present approach was entirely local in behavior it can be adapted for parallelization.

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Numerical analysis of turbulent lubrication in plain full journal bearings

Cited by 12 publications

References 18 publications

Turbulent Flow Fluid in the Hydrodynamic Plain Bearing to a Non-Textured and Textured Surface

Turbulent Flow Fluid in the Hydrodynamic Plain Bearing to a Non-Textured and Textured Surface

Multiple-relaxation-time lattice Boltzmann method of hydrodynamic lubrication in lemon-bore bearing

Three-dimensional hydrodynamic analysis of journal bearings using lattice Boltzmann method

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