Steady State Characteristics of Finite Oil Journal Bearingsconsidering Fluid Inertia effect and Influence of pressure dependent variable viscosity

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2017 by IJETT Journal
Volume-46 Number-7
Year of Publication : 2017
Authors : A.K.Bandyopadhyay, S.K.Mazumder, M.C.Majumdar
DOI :  10.14445/22315381/IJETT-V46P263


A.K.Bandyopadhyay, S.K.Mazumder, M.C.Majumdar "Steady State Characteristics of Finite Oil Journal Bearingsconsidering Fluid Inertia effect and Influence of pressure dependent variable viscosity", International Journal of Engineering Trends and Technology (IJETT), V46(7),372-378 April 2017. ISSN:2231-5381. published by seventh sense research group

This theoretical work describes the influence of fluid-inertia effects on performance characteristics of finite journal bearingconsidering with pressure dependent viscosity. The theoretical analysis is intended to show the effect of fluid inertia on the journal bearing performance for three-dimensional bearing geometries.The average Reynolds equation is modified to include the fluid inertia effect and variable viscosity effect and is used to obtain pressure field in the fluidfilm. The solutions of modified average Reynolds equations are obtained using finite difference method and appropriate iterative schemes. The effects of circumferential fluid-film pressure distribution, load carrying capacity of the bearing are studied by considering fluid-inertia effects.The steady state bearing performance analysis is done through parametric study of the various variables like modified Reynolds number, eccentricity ratio, slenderness ratio, attitude angle, Viscosity Parameter.The variation of bearing load carrying capacity, attitude angle, has been studied and plotted against various parameters.It has been found from the analysis that the steady state load carrying capacity increases with eccentricity ratio as well as with modified Reynolds number as viscosity parameter increases.It is also observed that load carrying capacity is higher for the effect of variable viscosity than Isoviscous lubricants.


1. V. N. Constantinescu and S. Galetuse “On the Possibilities of Improving the Accuracy of the Evaluation of Inertia Forces in Laminar and Turbulent Films” J. Tribol. Vol 96 (1), 69-77 (Jan 01, 1974) (9 pages), ASME, Journal of Tribology , Volume 96,Issue 1.
2. Pinkus, O. and Sternlicht, B., Theory of Hydrodynamic Lubrication, New York, McGraw-Hill (1961).
3. Banerjee Mihir B .,ShandilR.G.,andKatyal S.P.A “Nonlinear Theory of Hydrodynamic Lubrication” Journal of Mathematical Analysis and Applications 117,48-56(1986)
4. Tichy, J., and Bou-Said, B., 1991, “Hydrodynamic Lubrication and Bearing BehaviorWith Impulsive Loads,” STLE Tribol. Trans., 34, pp. 505–512.
5. Kakoty S. K. and Majumdar B. C., “Effect of Fluid Inertia on Stability of Oil Journal Bearing”. ASME Journal of Tribology, Vol 122, pp 741-745, October 2000
6. Elrod, H. G., 1979, ‘‘A General Theory for Laminar Lubrication with Reynolds Roughness,’’ ASME J. Lubr. Technol., 101, pp. 8–14.
7. Chen, C.H. and Chen, C.K., “The influence of fluid inertia on the operating characteristics of finite journal bearings”, Wear, Vol. 131, (1989), pp. 229-240
8. E. Sujith Prasad, T. Nagaraju& J. PremSagar “ Thermohydrodynamic performance of a journal bearing with 3d-surface roughness and fluid inertia effects” International Journal of Applied Research in Mechanical Engineering (IJARME) ISSN: 2231 –5950, Volume-2, Issue-1, 2012
9. B.C.Majumder, D.E.Brewe and M.M.Khonsari, “Stability of a rigid rotor supported on flexible oil Journal bearings,” Journal of Tribology Trans Vol 110, 1988, pp 181 - 187.
10. Dinesh Dhande, W.D.Pande, VikasChatarkar, “Analysis of hydrodynamic journal bearing using fluid structure interaction approach”, IJETT, Vol. 4, issue 8, August 2013.

modified Reynolds number, slenderness ratio, attitude angle, sommerfeld number, eccentricity ratio, journal bearings, inertia, and Viscosity Parameter.