Numerical investigation on the influence of surface texture on the performance of hydrodynamic journal bearing

Kango, Saurabh; Singh, Davinder; Sharma, R.

doi:10.1007/s11012-011-9460-y

Cited by 80 publications

(48 citation statements)

References 32 publications

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“…The discrete form of the Reynolds equation was solved using the Successive Over Relaxation (SOR) Gauss–Seidel iterative method, in which, the film pressure at each node ( i,j ) was computed with an over relaxation factor,

scriptℶ

, of 1.6, as reported

scriptℶ

to be between 1.5 and 1.85, to accelerate the convergence.

P_{i, j}^{(k + 1)} = P_{i, j}^{(k)} + scriptℶ ((), P_{i, j}^{(k + 1)} - P_{i, j}^{(k)})

…”

Section: Methodsmentioning

confidence: 99%

Influence of surface texture shape, geometry and orientation on hydrodynamic lubrication performance of plane‐to‐plane slider surfaces

Uddin

Ibatan

Shankar³

2016

Lubrication Science

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This paper investigates the effect of surface texturing on the tribological performance of hydrodynamic slider surfaces. The geometric parameters of the texture considered were the texture shape, bottom profile, orientation and depth. A theoretical model based on the steady‐state Reynolds equation was solved numerically by finite difference method to analyse the effect of surface texturing. The optimum geometry of each texture shape was determined, for which, the film thickness was maximised and the friction coefficient was minimised. Among all the shapes, the square with a single wedge bottom profile outperformed. The performance of the triangle, the chevron and the ellipse was highly influenced by their orientation with respect to the sliding direction. Texture density was found to be more dominant in impacting the tribological performance than the texture aspect ratio. The results obtained were further discussed with respect to the studies available in literature to emphasise the significance of the findings. Copyright © 2016 John Wiley & Sons, Ltd.

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scriptℶ

, of 1.6, as reported

scriptℶ

to be between 1.5 and 1.85, to accelerate the convergence.

P_{i, j}^{(k + 1)} = P_{i, j}^{(k)} + scriptℶ ((), P_{i, j}^{(k + 1)} - P_{i, j}^{(k)})

…”

Section: Methodsmentioning

confidence: 99%

Influence of surface texture shape, geometry and orientation on hydrodynamic lubrication performance of plane‐to‐plane slider surfaces

Uddin

Ibatan

Shankar³

2016

Lubrication Science

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“…The Reynolds equation was solved using a five point grid finite difference method. The discrete form of the Reynolds equation was solved using the Successive Over Relaxation (SOR) Gauss-Seidel iterative method, in which, the film pressure at each node was computed with an over relaxation factor, ‫,ב‬ of 1.6, as Kang et al [14] reported ‫ב‬ to be between 1.5 to 1.85, to accelerate the convergence. The convergence of the solution was checked with the relative error criterion, α, with the maximum variation in the average film pressure between two successive iterations to be less than 10 -5 .…”

Section: Numerical Modellingmentioning

confidence: 99%

New Star-Like Surfacetexture for Enhanced Hydrodynamic Lubrication Performance

Uddin

Liu

Shankar³

2017

Archives of Metallurgy and Materials

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This paper presents a numerical modelling and optimization of a new 'star-like' geometric texture shape with an aim to improve tribological performance. Initial studies showed that the triangle effect is the most dominant in reducing the friction. Motivated with this, a 'star-like' texture shape consisting of a series of triangular spikes around the centre of the texture is proposed. It is hypothesised that by increasing the triangular effect on a texture shape, the converging micro-wedge effect is expected to increase, hence increasing the film pressure and reducing the friction. Using the well-known Reynolds boundary conditions, numerical modelling of surface texturing is implemented via finite difference method. Simulation results showed that the number of apex points of the new 'star-like' texture has a significant effect on the film pressure and the friction coefficient. A 6-pointed texture at a texture density of 0.4 is shown to be the optimum shape. The new optimum star-like texture reduces the friction coefficient by 80%, 64.39%, 19.32% and 16.14%, as compared to ellipse, chevron, triangle and circle, respectively. This indicates the potential benefit of the proposed new shape in further enhancing the hydrodynamic lubrication performance of slider bearing contacts.

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“…Laser surface texture is considered as one of the advanced surface manufacturing techniques in fabricating surface texture in the last two decades, attracting much attention of researchers because of short processing times . Since the pioneering work was presented by Etsion and Burstein, many studies have concentrated on the investigations of hydrodynamic characteristics of journal bearings . The investigation of texture position has been the main focus in the current studies.…”

Section: Introductionmentioning

confidence: 99%

“…15,16 Since the pioneering work was presented by Etsion and Burstein, 5 many studies have concentrated on the investigations of hydrodynamic characteristics of journal bearings. [17][18][19][20][21][22] The investigation of texture position has been the main focus in the current studies. Ighil et al 17 employed Reynolds equation to illustrate the effect of texture geometry and texture distribution on lubrication characteristics.…”

Section: Introductionmentioning

confidence: 99%

Comparison of hydrodynamic characteristics between circumferential and transversal microgrooved journal bearings

Han

2019

Lubrication Science

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Surface texture has been proved to be an effective method to improve lubrication performance in lubrication contact. However, there exists the controversy about the influence of surface texture on lubrication performance of journal bearings. Moreover, the effect of texture position is not fully understood in current literatures. In the present work, a mass conservation Reynolds equation is employed to investigate the lubrication performance of journal bearings. Bearing characteristics such as the maximum pressure, load‐carrying capacity, friction force, friction coefficient are predicted with elliptical grooves. Two types of microgrooves are comprehensively investigated. The transversal groove in the divergent region (θg = 210° in the case) almost does not influence the lubrication performance. The grooves in the inlet and maximum pressure region provide a potential possibility to improve the lubrication performance of journal bearings. In the cases, full grooves yield negative influence on lubrication performance. In addition, the influence of groove configuration is also investigated under different operating conditions. The dimensionless performance parameters for the microgroove in the maximum pressure region (θg = 120° in the case) are more sensitive to the microgroove configuration.

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Numerical investigation on the influence of surface texture on the performance of hydrodynamic journal bearing

Cited by 80 publications

References 32 publications

Influence of surface texture shape, geometry and orientation on hydrodynamic lubrication performance of plane‐to‐plane slider surfaces

Influence of surface texture shape, geometry and orientation on hydrodynamic lubrication performance of plane‐to‐plane slider surfaces

New Star-Like Surfacetexture for Enhanced Hydrodynamic Lubrication Performance

Comparison of hydrodynamic characteristics between circumferential and transversal microgrooved journal bearings

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