Hydrodynamic Lubrication of Narrow Press-Fitted Porous Metal Bearings

Rouleau, W. T.

doi:10.1115/1.3656505

Cited by 59 publications

(14 citation statements)

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“…7 Capone 9 attempted to obtain the solution for the flow dynamic lubrication problem with a long porous bearing using the theoretical approach used by Morgan and Cameron. 7 Then, Rouleau 10 enabled the boundary conditions to be satisfied at the open ends by imposing a zero-pressure condition. Rhodes and Rouleau 11 examined the performance of a narrow porous bearing with sealed ends using the Darcy equation.…”

Section: Introductionmentioning

confidence: 99%

Lubrication characteristics of a textured porous sliding bearing

Lee

Jang

Wang

et al. 2015

Advances in Mechanical Engineering

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This study investigates the lubrication characteristics of a textured bearing sliding on a porous layer. To properly implement the porous layer effect in the bearing, the Brinkman-extended-Darcy model is employed, which results in a modified Reynolds equation. This equation is then evaluated to examine the effects of the porous layer's material and geometric properties on the lubrication characteristics through the use of (semi-)analytic and numerical approaches. The cavitation effect is reflected in the numerical treatment of the model equation, and an adaptive finite difference scheme is employed to efficiently model the bearing system with finite dimples that may be far smaller than the overall bearing dimensions. Along with the variation trends of the bearing performance with respect to the material and geometric properties of the porous layer, the pattern effects of textured surfaces on the bearing performance indices (load capacity and equivalent friction coefficient) are also thoroughly investigated. Here, the pattern comprised a set of regularly spaced identical dimples either in semi-spherical or semi-ellipsoidal shape, and the effects of size and orientation of the dimples are comprehensively explored to separately identify their influence on the bearing performance indices.

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Section: Introductionmentioning

confidence: 99%

Lubrication characteristics of a textured porous sliding bearing

Lee

Jang

Wang

et al. 2015

Advances in Mechanical Engineering

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“…The wall thickness H naturally entered this parameter in their analysis since a linear pressure gradient within the bearing material was assumed. Later, Rouleau [4] showed from his analysis that two dimensionless parameters were required to describe the performance of porous bearing; one was the permeability parameter St" = <&H/c 3 as defined by Morgan and Cameron [1] [4] indicates that the parameter came into the picture because of the term 2 12 6 • 4r tanh (irfinH/b)…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

“…This advantage is lost in defining St = <f>H/c 3 ; this is evident to any user of Rouleau's Pigs. 2, 3, and 4 of reference [4].…”

Section: (42)mentioning

confidence: 99%

“…Morgan and Cameron [l] 1 have given the solution for a short bearing and the experimental verification is provided by Cameron, Morgan, and Stainsby [2]. Rouleau improved [3] and solved the same problem [4] satisfying all the boundary conditions. Murti [5] has further improved the latter solution by considering the threedimensional flow of the lubricant in the porous matrix.…”

Section: Introductionmentioning

confidence: 99%

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Lubrication of Narrow Porous Bearings With Arbitrary Wall Thickness

Murti

1973

Journal of Lubrication Technology

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An analysis is given for the hydr• adynamic lubrication of short porous metal bearings that are press-fitted into a solid housing.An exact solution is given for the pressure of the lubricant in the bearing material using modified Bessel functions and the modified Reynolds equation for the problem is solved by the Galerkin method.Numerical results obtained on a digital computer indicate a progressive reduction in the load capacity and increment in the friction parameter and attitude angle as the permeability parameter is increased.These results are presented in graphical and tabular forms. A side result of this analysis is the emergence of a new permeability parameter and its convenience in bearing selection is discussed. Downloaded From: http://tribology.asmedigitalcollection.asme.org/ on 06/23/2015 Terms of Use: http://asme.org/terms Journal of Lubrication Technology OCTOBER 1 973 / 515 Downloaded From: http://tribology.asmedigitalcollection.asme.org/ on 06/23/2015 Terms of Use: http://asme.org/terms Journal of Lubrication Technology OCTOBER 1973/ 517

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“…Slip parameter s = k /αh 0 is non-dimensional group of permeability k, slip coefficient α and initial film thickness h 0 . The dotted curve corresponds to the no-slip case (s = 0) treated by Rouleau [22]. Further the slip constant α seems independent of fluid viscosity but depends on material parameter other than the permeability and in particular, on the porous surface characteristics [21,23].…”

Section: Mathematical Formulation and Solution Of The Problemmentioning

confidence: 99%

Hydromagnetic Squeeze Films between Porous Rectangular Plates with Couplestress Fluids

2012

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The theoretical investigation made in this paper is to study the effect of transverse magnetic field on the performance characteristics of porous squeeze film lubrication between two rectangular plates with couplestress fluids. A most general modified Reynolds equation is derived using Stokes constitutive equations for couplestress fluids. The fluid in the film region and in the porous region has been modeled as a couplestress fluid. The analysis takes into account velocity slip at the porous interface using Beavers-Joseph criterion. A closed-form expression for pressure, load carrying capacity and squeeze film time are obtained. The results are presented for different operating parameters. It is observed that effect of couplestresses on the MHD squeeze film lubrication between porous rectangular plates is to increase the load carrying capacity significantly and to delay the time of approach as compared to the corresponding non-magnetic case and Newtonian case.

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Hydrodynamic Lubrication of Narrow Press-Fitted Porous Metal Bearings

Cited by 59 publications

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Lubrication characteristics of a textured porous sliding bearing

Lubrication characteristics of a textured porous sliding bearing

Lubrication of Narrow Porous Bearings With Arbitrary Wall Thickness

Hydromagnetic Squeeze Films between Porous Rectangular Plates with Couplestress Fluids

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