Lubrication of finite porous journal bearings

Murti, P. R. K.

doi:10.1016/0043-1648(73)90152-x

Cited by 16 publications

(11 citation statements)

References 11 publications

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“…13,25,26 Whereas for lower values of b, loss of pressure due to leakage is reduced and variation in the fluid film pressure distribution is not much significant, hence not much variation in the attitude angle. 27 From Figure 7, it is seen that the friction variable increases with increase in b and volume flowrate decreases with increase in b. A similar kind of trend is observed with other values of r z .…”

Section: Resultssupporting

confidence: 81%

Investigation of velocity slip effect on steady state characteristics of finite hydrostatic double-layered porous oil journal bearing

Kumar

Samanta

Murmu

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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Steady state characteristics of finite hydrostatic double layer porous oil journal bearing are investigated theoretically by incorporating tangential velocity slip at the porous-film interface given by Beavers-Joseph. The governing equations for flow in the porous medium and modified Reynolds equation in the film region are solved simultaneously using finite difference method. The effects of slip and design variables such as feeding parameter, bearing number, eccentricity ratio, slenderness ratio, and anisotropy of permeability have been investigated on bearing performance characteristics like loadcarrying capacity, attitude angle, friction variable, and volume flowrate. The results are depicted in the form of graphs that can be utilized during design.

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Section: Resultssupporting

confidence: 81%

Investigation of velocity slip effect on steady state characteristics of finite hydrostatic double-layered porous oil journal bearing

Kumar

Samanta

Murmu

2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Murti [23] derived a modified Reynolds equation that accounts for the slip velocity effect and is applicable to a finite porous bearing. He concluded that the slip effect is predominant at low values of permeability.…”

Section: Porous Bearings Modeling: Brief Reviewmentioning

confidence: 99%

A parametric study of a porous self-circulating hydrodynamic bearing

Balasoiu

Braun

Moldovan

2013

Tribology International

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“…Where, K x and K z are the non-dimensional permeability parameters along x-and z-directions. For thin porous bush (H ⁄ R) ≤ 0.2 the curvature effect may be neglected [10,22,28] and the modified form of the Reynolds equation in the fluid film can be written as,…”

Section: Governing Equation For Bearing Clearancementioning

confidence: 99%

“…Porous journal bearings found its application in different industrial machineries like generators, water-pumps, sewing-machines and in home appliances like vacuum-cleaners, hair-driers, shaving-machines etc. Several researchers have presented studies on porous journal bearings [20][21][22][23], in which they considered Darcy's law with certain Japanese Society of Tribologists (http://www.tribology.jp/)…”

Section: Introductionmentioning

confidence: 99%

Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition

Baidya¹,

Das

2019

Tribology Online

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The objective of the present work is to study theoretically, the steady-state performance of finite hydrodynamic porous journal bearings under micropolar lubrication. The fluid pressure in porous matrix follows Darcy's equation. In the film zone, the modified Reynolds equation is developed considering micropolar lubrication theory. Both Darcy's and modified Reynolds equations are solved using finite difference technique with successive over-relaxation method to obtain the steady-state film pressure. The steady-state performance characteristics are evaluated in terms of non-dimensional load carrying ability, friction force and friction parameter of a finite journal bearing for different values of micropolarity viz, l m and N, and varying characteristics of porous bearing. The results show that the micropolar fluid is better than the Newtonian fluid when load carrying ability and friction parameters are concerned. The slip has a beneficial effect in terms of increase in load carrying ability and reduction in friction parameter approximately to 0.7, beyond which the advantage diminishes. l m exhibits an optimal value around 10.0. In case of industrial machinery and home appliances which uses the porous bearings and where the lubricant either gets contaminated with micro-elements or dust, mixing of additives will return better results.

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Lubrication of finite porous journal bearings

Cited by 16 publications

References 11 publications

Investigation of velocity slip effect on steady state characteristics of finite hydrostatic double-layered porous oil journal bearing

Investigation of velocity slip effect on steady state characteristics of finite hydrostatic double-layered porous oil journal bearing

A parametric study of a porous self-circulating hydrodynamic bearing

Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition

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