Steady-state performance of a circular journal bearing lubricated with a non-Newtonian fluid considering the elastic deformation of the liner

Abstract

In this work, a numerical study of the effect of elastic deformation on the static characteristics of a circular journal bearing operating with non-Newtonian fluids obeying to the power law model is presented. The modified Reynolds equation has been derived taking into consideration the effect of non-Newtonian behavior of the fluids. To obtain the pressure distribution, the Reynolds equation has been solved using finite difference technique with appropriate iterative technique incorporating Reynolds boundary conditions. The static performance characteristics for finite-width journal bearing in terms of the load-carrying capacity, the attitude angle, friction coefficient, and the side leakage have been studied for various values of the non-Newtonian power law index n and the elastic coefficient. The results show that the increase of the power law index produces a higher load-carrying capacity, a higher side leakage, a lower attitude angle, and a lower friction coefficient. From this study, it can be concluded that the elastic deformation has an important influence on the static characteristics of the journal bearing lubricated with a non-Newtonian fluid, and this influence is more significant for the journal bearing operating at larger values of the eccentricity ratio.

Keywords

Journal bearing non-Newtonian fluid elastohydrodynamic finite difference technique static characteristics

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References

Safar

. Journal bearing operating with non-Newtonian lubricant films. Wear 1979; 53: 95–100.

Dien

Elrod

. A generalized steady-state Reynolds equation for non-Newtonian fluids, with applications to journal bearings. J Lubr Technol 1983; 105: 385–390.

Jang

Chang

. Adiabatic solutions for a misaligned journal bearing non-Newtonian lubricants. Tribol Int 1987; 20: 267–275.

Lin

Wang

. Thermohydrodynamic analysis of finite-width, partial-arc journal bearings with non-Newtonian lubricants: part II. Tribol Int 1990; 23: 211–216.

Osman

Nada

Safar

. Different magnetic models in the design of hydrodynamic journal bearings lubricated with non-Newtonian ferrofluid. Tribol Lett 2003; 14: 211–223.

Soni

Vakharia

. Static analysis of hydrodynamic journal bearing in turbulent regime with non-Newtonian lubricant. Tribol Online 2015; 10: 246–261.

Khatri

Sharma

. Influence of textured surface on the performance of non-recessed hybrid journal bearing operating with non-Newtonian lubricant. Tribol Int 2016; 95: 221–235.

Conway

Lee

. The analysis of the lubrication of a flexible journal bearing. J Lubr Technol 1975; 97: 599–604.

Jain

Sinhasan

Sing

. The performance characteristics of thin compliant shell journal bearings. Wear 1982; 81: 251–261.

10.

Sinhasan

Goyal

. Elastohydrodynamic studies of circular journal bearings with non-Newtonian lubricants. Tribol Int 1990; 23: 419–428.

11.

Mokhiamer

Crosby

El-Gamal

. A study of a journal bearing lubricated by fluids with couple stress considering the elasticity of the liner. Wear 1999; 224: 194–201.

12.

Lahmar

Ellagoune

Bou-Saïd

. Elastohydrodynamic lubrication analysis of a compliant journal bearing considering static and dynamic deformations of the bearing liner. Tribol Trans 2010; 53: 349–368.

13.

Chetti

. Analysis of a circular journal bearing lubricated with micropolar fluids including EHD effects. Ind Lubr Tribol 2014; 66: 168–173.

14.

Muzakkir

Lijesh

Hirani

. Effect of cylindricity on the tribological performance of heavily loaded slow-speed journal bearing. Proc IMechE, Part J: J Engineering Tribology 2015; 229: 178–195.

15.

Mouassa

Boucherit

BouSaïd

, et al. Steady-state behavior of finite compliant journal bearing using a piezoviscous polar fluid as lubricant. Mech Ind 2015; 16: 608.

16.

Das

Roy

. Analysis and comparison of steady-state performance characteristics of two-axial groove and multilobe hydrodynamic bearings lubricated with non-Newtonian fluids. Proc IMechE, Part J: J Engineering Tribology 2018; 232: 1581–1596.

17.

Chetti

. Combined effects of turbulence and elastic deformation on the performance of a journal bearing lubricated with a couple stress fluid. Proc IMechE, Part J: J Engineering Tribology 2018; 232: 1597–1603.

18.

Chen

Sun

. Elastohydrodynamic behavior analysis of journal bearing using fluid-structure interaction considering cavitation. Arab J Sci Eng 2019; 44: 1305–1320.