Effect of Nanoparticle Additives on Journal Bearing Lubricated with Non-Newtonian Carreau Fluid

Gunnuang, W.; Aiumpornsin, Chatchai; Mongkolwongrojn, Mongkol

doi:10.4028/www.scientific.net/amm.751.137

Cited by 8 publications

(9 citation statements)

References 7 publications

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“…Under the same load, the oil-lubricated bearing of the Al 2 O 3 mixture can work with a lower eccentricity ratio than pure oil-lubricated bearings. 31 The journal bearing performance lubricated with two types of lubricants: base oil and pure oil blended with Al 2 O 3 nanoparticles shows that compared with the eccentricity ratio (0.9), the nano-additive lubricant reduced the friction coefficient and increased the load-carrying capacity (17.7%) as shown in Figure 6. The comparison also comes from oil that is too pure.…”

Section: Types Of Nanofluid Additives Examplesmentioning

confidence: 99%

Application of nanofluids on various performance characteristics of hydrodynamic journal bearing—A review

Mandal

Bhattacharjee

Biswas

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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Bearings are designed to support the loads normally applied to the shaft, while allowing relative movement between two machine elements. Journal or sliding bearings are perhaps the most well-known sorts of hydrodynamic bearings. The journal bearings contain no rolling elements and these bearings’ design and construction are simple, but their operation and theory are complex. Due to this and other advantages, journal bearings are much preferred in engineering applications. Simultaneously, the associated research and development have resulted in reasonable progress and therefore, a thorough review of these is earnestly felt. The static and dynamic characteristics of hydrodynamic journal bearings mainly depend on the lubricant viscosity and other factors such as load, speed, friction, and eccentricity. The review analysis focused on nanofluid lubricated hydrodynamic journal bearings are one of the rare topics of interest among tribologists. The use of a nanofluid as a lubricant is very important as it significantly improves the performance characteristics of the investigated bearing. The aggregation of nanoparticles in lubricants available commercially can cause a sharp increase in pressure drop and significantly improve the lubricant viscosity, which leads to an increase in load-carrying capacity. The tribological properties of various lubricants/base oils can be augmented by nanoparticles containing the lubricant. Studies have shown that compared to other conventional engine oils the load-carrying capacity is increased with nanoparticles containing the lubricant.

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Section: Types Of Nanofluid Additives Examplesmentioning

confidence: 99%

Application of nanofluids on various performance characteristics of hydrodynamic journal bearing—A review

Mandal

Bhattacharjee

Biswas

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…The frictional power losses were reduced by 40-51 % and wear rate decreased by 17 % using hybrid nanolubricant that would have promising approach to automotive fuel economy and an increased life span for engine parts. Gunnuang et al [40] analyzed the performance of journal bearing using Al2O3 nanoparticles. Carreau viscosity model was implemented in the study for multigrade engine oil SAE 10W50.…”

Section: Literature Reviewmentioning

confidence: 99%

“…The geometry of bearing has a crucial impact on the whirl phenomenon, so it is necessary to analyze the performance characteristics for different geometries of bearing considering thermal effects. Some of the researchers [14,[17][18][19]21,24,[27][28][29][30][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] have provided the study on the thermal effect and an influence of lubricant additives on the performance of the system.…”

Section: Introductionmentioning

confidence: 99%

Effect of TiO2 Nanoparticles Blended with Lubricating Oil on the Tribological Performance of the Journal Bearing

Suryawanshi¹,

Pattiwar²

2018

Tribol. Ind.

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This paper presents the performance analysis for plain and elliptical journal bearing operating with industrial lubricants. Titanium dioxide nanoparticle of size 40 nm is used as a lubricant additive to examine the performance of the bearing. Comparative analysis is carried out for three different lubricants with titanium dioxide (0.5% wt) nanoparticles. Performance of bearing is measured at speeds ranging from 500 r.p.m. to 1000 r.p.m. and at 1000 N load. The study of antiwear and antifriction properties for lubricants is carried out on four ball Tribo-tester for operating conditions specified by ASTM standards. An influence of titanium dioxide as an additive on the performance characteristics of the journal bearing such as pressure distribution, load carrying capacity, attitude angle, power loss, oil flow rate, side leakage, frictional force and temperature rise in a film is examined in this paper. The elliptical journal bearing improves the performance of a system over plain bearing operating with the same lubricant.

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“…The oil containing dispersed nano particles shows a higher viscosity in comparison with the base oil and hence influences the oil film temperature and the overall bearing performance. Different types of nano particles were used as an additives to the base oil such as TiO2 [10][11], Si,SiO2, Al, Al2O3,Cu, and CuO [12], Al2O3 and ZnO [13], Al2O3 [14][15]. Different viscosity models were used to include the effect of the dispersed nano particles on the viscosity of the base lubricant.…”

Section: Introductionmentioning

confidence: 99%

CFD analysis of nano-lubricated journal bearing considering variable viscosity and elasticity effects

Kadhim¹,

Abass²,

Ahmed³

2022

Diagnostyka

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The main objective of the present work is to study the behavior of Nano-lubricated journal bearing considering elasticity and variable viscosity effects. A mathematical model for a journal bearing is employed using three-dimensional computational fluid dynamics. The study is implemented for a journal bearing with laminar flow and smooth surfaces lubricated with pure oil as well as lubricants containing different concentrations of Al2O3 Nano-particles. The dependence of the oil viscosity on the temperature is considered by using the modified Krieger Dougherty model. Pressure, temperature and elastic deformation in addition to the bearing load-carrying capacity of the bearing working under different eccentricity ratios (0.1-0.6) have been studied. The mathematical model is confirmed by comparing the results of the pressure and temperature distributions obtained in the current work with those obtained by Ferron et al.(1983) for a bearing lubricated with pure oil. Also, the pressure obtained for the Nano-lubricated bearing of the present work is validated with that obtained by Solighar (2015). The results are found in good agreement with a maximum deviation not exceeding 5%. The obtained results show that the oil film pressure increases by about 17.9% with a slight decrease in oil film temperature and friction coefficient.

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Effect of Nanoparticle Additives on Journal Bearing Lubricated with Non-Newtonian Carreau Fluid

Cited by 8 publications

References 7 publications

Application of nanofluids on various performance characteristics of hydrodynamic journal bearing—A review

Application of nanofluids on various performance characteristics of hydrodynamic journal bearing—A review

Effect of TiO2 Nanoparticles Blended with Lubricating Oil on the Tribological Performance of the Journal Bearing

CFD analysis of nano-lubricated journal bearing considering variable viscosity and elasticity effects

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