Analysis of Micropolar and Power Law Fluid–Lubricated Slider and Journal Bearing with Partial Slip–Partial Slip Texture Configuration

Rao, T. V. V. L. N.; Rani, Ahmad Majdi Abdul; Nagarajan, T.; Hashim, Fakhruldin Mohd

doi:10.1080/10402004.2015.1121310

Cited by 12 publications

(12 citation statements)

References 31 publications

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“…The results showed favorable performance characteristics of the above bearings with micropolar lubricant as compared to Newtonian fluid, where the maximum load capacity and friction force were observed to increase with the increase in concentration of additives and contaminants in the lubricant. In recent years, many works were devoted to analysis the bearing performances by considering the combined effects of micropolar fluids and influencing factors, such as journal misalignment, 29,30 cavitation effect, 31 thermal effect, 32 elastic deformation, 33,34 three-dimensional irregularities effect, 35 partial slip configuration, 36 turbulent effect, 37 dynamic loading 38,39 and stability characteristics, 40–42 etc.…”

Section: Introductionmentioning

confidence: 99%

Computational investigation on the performance of hydrodynamic micro-textured journal bearing lubricated with micropolar fluid using mass-conserving numerical approach

Manser

Belaidi

Khelladi

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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The tribological characteristic of journal bearing systems can be enhanced with the integrating of textures in the contact interfaces, or using the lubricating effect of non-Newtonian fluids. In this study, the combined effects of bearing surface texturing and non-Newtonian lubricants behavior, using micropolar fluid model, on static characteristics of hydrodynamic circular journal bearings of finite length are highlighted. The modified Reynolds equation of micropolar lubrication theory is solved using finite differences scheme and Elrod's mass conservation algorithm, taking into account the presence of the cylindrical texture shape on full and optimum bearing surfaces. The optimization textured area is carried out through particle swarm optimization algorithm, in order to increase the load lifting capacity. Preliminary results are in good agreement with the reference ones, and present an enhancement in the performances of micro-textured journal bearings (load carrying capacity and friction). The results suggest that texturing the bearing convergent zone significantly increases the load carrying capacity and reduce friction coefficient, while fully texturing causes bad performances. It is also shown that the micropolar fluids exhibit better performances for smooth journal bearings than a Newtonian fluid depending on the size of material characteristic length and the coupling number. The combined effects of fully surface textured with micropolar fluids reduce the performance of journal bearing, especially at lower eccentricity ratios. Considering the optimal arrangement of textures on the contact surface, a significant improvement in terms of load capacity and friction can be achieved, particularly at high eccentricity ratios, high material characteristic lengths and high values of the coupling numbers of micropolar fluids.

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Section: Introductionmentioning

confidence: 99%

Computational investigation on the performance of hydrodynamic micro-textured journal bearing lubricated with micropolar fluid using mass-conserving numerical approach

Manser

Belaidi

Khelladi

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Необходимо отметить, что дальнейшее уточнение геометрических размеров и расположения маслоподающих источников и их влияние на работоспособность и ГМХ трибосопряжений возможно при учете, в частности, таких факторов, как регулярная и нерегулярная микрогеометрия поверхностей трения, реологические характеристики смазочного материала, что отражается современной тенденцией в области расчетного исследования трибосопряжений [16][17][18][19][20].…”

Section: обсуждение и применениеunclassified

Influence of lubrication sources location on hydromechanical characteristics of heavy-loaded bearings in thermal engines

Гаврилов¹,

Izzatulloev²,

Gritsenko³

et al. 2019

MEI

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“…26–28 Rao et al. 26 reduced the friction coefficient using a partial slip configuration along with a higher coefficient of slip yields.…”

Section: Introductionmentioning

confidence: 99%

“…24,25 When the temperature of a sliding metal increases, several effects occur: its mechanical properties change, its rate of oxidation increases, and phase transformations may take place, all of which influence its frictional behavior. [26][27][28] Rao et al 26 reduced the friction coefficient using a partial slip configuration along with a higher coefficient of slip yields.…”

Section: Introductionmentioning

confidence: 99%

Friction coefficient and performance evaluation of plain journal bearing using SAE 5W-30 engine oil

Chowdhury

Mia

Kchaou

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part J:

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Friction is a crucial parameter in tribological applications such as power transmission, crankshafts, gears, cams, bearings, and other rotating machine parts or components. Due to the relative motion of the shaft and bearing, friction needs to be analyzed according to all lubrication states of the journal bearing. The friction coefficient was significantly reduced using piezo-viscous SAE 5W-30 engine oil in this study. An adequate lubricant pressure is obtained using this approach to produce a suitable oil film thickness. Minimal variation in lubricant temperature was obtained which prescribes the sustainability of the lubricant. The bearing performance was observed through computational fluid dynamics analysis under different viscosities. The SAE 5W-30 lubricant-containing 0.052693 Pa s viscosity minimized bearing deformation and stress formation at 500, 750, and 1000 r/min. A new bearing material as gun-metal having good bearing properties and good resistance to corrosion has been proposed in this study.

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Analysis of Micropolar and Power Law Fluid–Lubricated Slider and Journal Bearing with Partial Slip–Partial Slip Texture Configuration

Cited by 12 publications

References 31 publications

Computational investigation on the performance of hydrodynamic micro-textured journal bearing lubricated with micropolar fluid using mass-conserving numerical approach

Computational investigation on the performance of hydrodynamic micro-textured journal bearing lubricated with micropolar fluid using mass-conserving numerical approach

Influence of lubrication sources location on hydromechanical characteristics of heavy-loaded bearings in thermal engines

Friction coefficient and performance evaluation of plain journal bearing using SAE 5W-30 engine oil

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