THD Effects of Static Performance Characteristics of Infinitely Wide Turbulent Journal Bearings

Shyu, Shiuh Hwa; Li, Fuli; Jeng, Yeau-Ren; Lee, Wei Ren; Hsieh, Sheng Jii

doi:10.1080/10402004.2010.512116

Cited by 12 publications

(5 citation statements)

References 23 publications

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“…So to investigate the performance of the hydrodynamic JB, the turbulence effect should be taken into account. The turbulence flow effect on a hydrodynamics circular JB was considered by numerous investigators (Constantinescu, 1962; Soni et al , 1984; Kumar and Rao, 1993; Shyu et al , 2010). Vaidyanathan and Keith (1991) studied numerically the turbulent performance characteristics of four bearings with different geometries, namely, two-lobed, elliptical, circular and worn – circular.…”

Section: Introductionmentioning

confidence: 99%

Investigation the combined effects of wear and turbulent on the performance of hydrodynamic journal bearing operating with couple stress fluids

Mahdi

Hussein

2019

IJSI

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Purpose The purpose of this paper is to investigate the combined effect of wear and turbulence on the performance of a hydrodynamic journal bearing operating under Newtonian and couple stress fluids (CSF). Design/methodology/approach The analysis consists of a modified Reynolds equation of incompressible thin viscous films, and the film thickness model taking into account the wear effect. The governing equation was solved numerically using the finite difference approach. Findings The effect of both the wear parameter and the local Reynolds number on the performance characteristics of bearing has been presented and discussed. The obtained results observed that the characteristics of the intact and worn bearing in turbulent and laminar have been enhanced due to the non-Newtonian fluid (CSF) effect. Also, the results display that bearing worn and the turbulent regime cannot be neglected in calculating the performance characteristics of the bearing lubricated with Newtonian and non-Newtonian fluids. The results achieved from this study, specify that the bearing characteristics are significantly affected by these effects. Originality/value The paper investigates the behavior of hydrodynamic bearings considering different aspects simultaneously is interesting, and the application meets the current needs of improvement in modeling hydrodynamic bearings under different conditions.

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Section: Introductionmentioning

confidence: 99%

Investigation the combined effects of wear and turbulent on the performance of hydrodynamic journal bearing operating with couple stress fluids

Mahdi

Hussein

2019

IJSI

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“…The effect of turbulence on a circular bearing was studied by several researchers. [14][15][16][17] The static performance of a misaligned externally fluid film bearings lubricated with couple stress fluids in turbulent regime was achieved by Shenoyet al 18 Recently, Chetti 19 presented an analysis of the static characteristics of two-lobe journal bearings lubricated with couple stress fluids operating in a turbulent regime.…”

Section: Introductionmentioning

confidence: 99%

Combined effects of turbulence and elastic deformation on the performance of a journal bearing lubricated with a couple stress fluid

Chetti

2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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This paper presents a numerical study of the effect of turbulence and elastic deformation on the performance of a journal bearing operating with couple stress fluids, following Constantinescu's turbulent lubrication theory. The modified Reynolds equation is derived taking into consideration the effect of turbulence and couple stresses. The modified Reynolds equation is solved using finite difference method. The results in terms of the load-carrying capacity, the attitude angle, friction coefficient and the side leakage are reported for various values of the couple stress parameter, the elastic coefficient, and Reynolds number. According to the obtained results, the couple stress fluid improves the performance characteristics of the rigid and deformed journal bearing in laminar and turbulent regimes. The results also show that bearing deformation and the turbulent regime cannot be neglected in calculating the performance characteristics of journal bearings lubricated with a Newtonian and a couple stress fluid.

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“…In the existing literature, several investigators, notably Gethin (1996); Khonsari et al (1996), Sehgal et al (2000), Agostino and Senatore (2006), McCarthy et al (2009), Shiuh-Hwa Shyu et al (2010) and Amit et al (2011), conducted a literature survey which considered the need to include the effect of temperature boundary conditions and viscous dissipation on the thermohydrodynamic behavior of high-speed journal bearing. Most of these analyses considered variable viscosity for the thermohydrodynamic lubrication analysis of high-speed journal bearing.…”

Section: Introductionmentioning

confidence: 99%

Static characteristics of thermohydrodynamic journal bearing operating under lubricants containing nanoparticles

Kalakada

Kumarapillai

2015

Industrial Lubrication and Tribology

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Purpose -The purpose of this work is to investigate the static performance characteristics of thermohydrodynamic journal bearing operating under nanolubricants (lubricants containing per cent weight concentration of nanoparticles). Design/methodology/approach -Addition of nanoparticles in the lubricant increases lubricant viscosity. To study the effect of this variation on journal bearing, analytical models are developed for the relationship between viscosity, 0-0.5 per cent weight concentration of nanoparticles and temperature range of 300-900°C. To obtain pressure and temperature distribution, modified Reynolds and energy equations are solved by using the finite element method. The viscosity field (varies with temperature and per cent weight concentration of nanoparticles) is updated in these two equations by using the developed analytical model. The steady-state performance characteristics are computed for various values of eccentricity ratios for non-thermoviscous (viscosity of lubricant varies with per cent weight concentration of nanoparticles) and thermoviscous (viscosity of lubricant varies with per cent weight concentration of nanoparticles and temperature) cases. The lubricant and the nanoparticles used for the present work are SAE15W40, copper oxide (CuO), cerium oxide (CeO 2 ) and aluminum oxide (Al 2 O 3 ). Findings -The pressure and temperature distribution across the lubricant film in the clearance space of journal bearing and static performance characteristics are calculated. Originality/value -The computed results show that addition of nanoparticles in the lubricant influences the performance characteristics considerable in thermoviscous case than non-thermoviscous case.

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THD Effects of Static Performance Characteristics of Infinitely Wide Turbulent Journal Bearings

Cited by 12 publications

References 23 publications

Investigation the combined effects of wear and turbulent on the performance of hydrodynamic journal bearing operating with couple stress fluids

Investigation the combined effects of wear and turbulent on the performance of hydrodynamic journal bearing operating with couple stress fluids

Combined effects of turbulence and elastic deformation on the performance of a journal bearing lubricated with a couple stress fluid

Static characteristics of thermohydrodynamic journal bearing operating under lubricants containing nanoparticles

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