The Magnetohydrodynamic Slider Bearing

Snyder, William T.

doi:10.1115/1.3657252

Cited by 29 publications

(7 citation statements)

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“…In this technology, the pressurized working fluid in the closed cycle EFGT is used as lubricant and coolant for the bearings. Magneto-hydrodynamic (MHD) bearings with conductive lubricant material were studied elaborately in the early 1960s [101][102][103][104]. However, magnetic bearings with no required conductive lubricant is more practical and best suited for the HTR closed cycle EFGT.…”

Section: Gas Turbine Lubrication Systemmentioning

confidence: 99%

Externally fired gas turbine technology: A review

2015

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Section: Gas Turbine Lubrication Systemmentioning

confidence: 99%

Externally fired gas turbine technology: A review

2015

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“…Because of the industrial necessity for bearings design, many authors have investigated the MHD slider-bearing performance using conducting Newtonian lubricants and applying a uniform transverse magnetic field. For example, Snyder (1962), Hughes (1963a), Lin et al (2009) studied infinite inclined plane slider bearing, Hughes (1963b) investigated finite step slider bearing, Lin (2003) and Kesavan et al (2014) considered finite rectangular plates. These studies found that increasing the external magnetic field strength increases load-bearing capacity compared with the nonmagnetic case.…”

Section: Introductionmentioning

confidence: 99%

Effect of non-Newtonian magneto-elastohydrodynamic on performance characteristics of slider-bearings

Mouda

Nabhani

Khlifi

2019

ILT

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Purpose This study aims to examine the magneto-elastohydrodynamic effect on finite-width slider-bearings lubrication using a non-Newtonian lubricant. Design/methodology/approach Based on the magneto-hydrodynamic (MHD) theory and Stokes micro-continuum mechanics, the modified two-dimensional Reynolds equation including bearing deformation was derived. Findings It is found that the bearing deformation diminishes the load-capacity and increases the friction coefficient in comparison with the rigid case. However, the non-Newtonian effect increases load-capacity but decreases the friction coefficient. Moreover, the use of a transverse magnetic field increases both the friction coefficient and load capacity. Originality/value This study combines for the first time MHD and elastic deformation effects on finite-width slider-bearings using a non-Newtonian lubricant.

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“…The study of dynamics of flow of electrically conducting fluid with the application of magnetic field is known as magnetohydrodynamic (MHD). Several investigators were studied the effect of applied magnetic field on the performance of bearings such as lubrication of bearing in the presence of magnetic field by Agarwal , slider bearing by Snyder , squeeze film by Hazma and finite slider bearings by Lin . They concluded that the applied magnetic field increases the load carrying capacity and decreases the frictional force.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface roughness on static and dynamic characteristics of MHD couple stress lubrication of inclined plane slider bearing

Naduvinamani

Siddangouda²,

Patil³

2017

Z Angew Math Mech

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The effect of surface roughness on static and dynamic characteristics of inclined plane slider bearing lubricated with couple stress fluid in the presence of magnetic field is theoretically analysed. The modified stochastic MHD couple stress Reynolds type equation is derived on the basis of Christensen stochastic theory by considering two types of onedimensional roughness patterns namely longitudinal and transverse. Expressions for steady pressure and load, dynamic stiffness, and damping coefficients are obtained for both the types of roughness patterns. Compared to smooth surface, transverse roughness pattern provides larger load carrying capacity, dynamic stiffness, and damping coefficients whereas longitudinal roughness pattern has adverse effects. Further, the presence of couple stress and applied magnetic field improves the bearing performance.Bearings ensure high efficiency and reliability depending on their size, type of functioning, materials used in manufacturing and use of fluid for lubrication. In earlier studies of bearings, the lubricant is assumed to be Newtonian fluid which is not a satisfactory approach for the practical applications. Many researchers worked to overcome this limitation and found that, by adding some amount of long chained polymers to Newtonian fluid, the desirable lubricant can be obtained. Many theories were proposed to represent the use of non-Newtonian fluids. Among these, the simplest generalization of classical theory proposed by Stokes [1], which allows for polar effects such as the presence of body couples and couple stresses. Many investigators used this couple stress fluid theory to study the effect of couple stress on the bearing performance such as, the flow between finite plates by Ramanaiah [2], partial journal bearing by Lin [3] and double layered porous slider bearing by Bujurke et al. [4]. These studies shown that, the use of couple stress fluids enhances bearing performance as compared to Newtonian case.The study of dynamics of flow of electrically conducting fluid with the application of magnetic field is known as magnetohydrodynamic (MHD). Several investigators were studied the effect of applied magnetic field on the performance of bearings such as lubrication of bearing in the presence of magnetic field by Agarwal [5], slider bearing by Snyder [6], squeeze film by Hazma [7] and finite slider bearings by Lin [8]. They concluded that the applied magnetic field increases the load carrying capacity and decreases the frictional force. The results obtained for the effect of MHD and couple stresses motivated several researchers to study combined effects of MHD and couple stress. The combined effect of MHD and couple stress were studied by several investigators, such as slider bearing by Das [9], sphere and plane surface by Naduvinamani and Rajashekar [10], squeeze film between parallel surfaces by Kudenatti et al. [11] and different types of finite plates by Fathima et al. [12]. According to these studies, the combined effect of MHD and couple stresses results in enh...

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The Magnetohydrodynamic Slider Bearing

Cited by 29 publications

References 0 publications

Externally fired gas turbine technology: A review

Externally fired gas turbine technology: A review

Effect of non-Newtonian magneto-elastohydrodynamic on performance characteristics of slider-bearings

Effect of surface roughness on static and dynamic characteristics of MHD couple stress lubrication of inclined plane slider bearing

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