Investigation of slip effects in plane porous journal bearings

Chandra, Mahesh; Malik, M.; Sinhasan, R.

doi:10.1016/0043-1648(81)90209-x

Cited by 22 publications

(16 citation statements)

References 12 publications

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“…2. It is observed that the velocity slip decreases the absolute values of dynamic coefficients, and similar results were observed by Chattopadhyay and Majumdar (4) and Chandra, et al (19). This phenomenon may be attributed to the increase in velocity-induced flow (Couette flow) due to slip and a simultaneous reduction in pressure-induced flow to maintain flow continuity in the same clearance space (Chandra,et al (19)).…”

Section: Variation Of Dynamic Coefficientssupporting

confidence: 84%

“…They observed that wall slip enhances the system operation stability if the sleeve surface is designed as the optimized slip surface. Chandra, et al (19) investigated the effects of velocity slip on the static as well as dynamic performance of plane porous journal bearings. Chattopadhyay, et al (20) theoretically investigated the stability characteristics of hydrostatic a conventional porous oil journal bearing considering the effect of velocity slip.…”

Section: Introductionmentioning

confidence: 99%

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Rigid Rotor Stability Analysis on Finite Hydrostatic Double-Layer Porous Oil Journal Bearing with Velocity Slip

Kumar

Samanta

Murmu

2015

Tribology Transactions

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A theoretical investigation has been carried out for stability characteristics of a finite hydrostatic double-layer porous oil journal bearing considering the effect of Beavers-Joseph velocity slip at the porous film interface. A linearized perturbation method has been used to obtain the threshold of stability in terms of critical mass parameter. The effect of slip parameters, eccentricity ratios, bearing feeding parameter, and slenderness ratio on the stability is investigated. Furthermore, nonlinear transient analysis is carried out to determine the system stability by tracing the journal center locus. Several trajectories of the journal center locus have been obtained for different operating conditions and are depicted with the help of graphics.

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Section: Variation Of Dynamic Coefficientssupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Rigid Rotor Stability Analysis on Finite Hydrostatic Double-Layer Porous Oil Journal Bearing with Velocity Slip

Kumar

Samanta

Murmu

2015

Tribology Transactions

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“…Murti 17 derived a modified Reynolds equation using the criterion proposed by Beavers and Joseph 16 and introduced the velocity slip phenomenon into the analysis of narrow porous bearings. Chandra et al 18 also considered the velocity slip phenomenon to theoretically identify the static and dynamic characteristics of a plane porous journal bearing. Also, Srinivasan 19 performed an analysis on axially undefined porous journal bearings using a similar theoretical basis to that of Beavers and Joseph.…”

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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“…Kumar and Rao [13] presented a theoretical investigation on the steady-state characteristics of finite hydrodynamic porous oil journal bearings in turbulent regimes. Chandra et al [14] investigated analytically the steady-state characteristics of a finite porous journal bearing with slip using Galerkin's method. It was observed that slip reduces the load capacity and power loss of the porous bearing.…”

Section: Introductionmentioning

confidence: 99%