Non-linear transient analysis of multiple axial groove water-lubricated journal bearings

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10 Citations (Scopus)

Abstract

The stability characteristics of water-lubricated journal bearings having multiple axial grooves are studied theoretically. These bearings can use the process fluid as the lubricant as in the case of feed water pumps. The process fluid (water) is fed from one end of the bearing, through the multiple axial grooves (groove angles may vary). A non-linear analysis of a rigid rotor supported on journal bearings under unidirectional constant load, unidirectional periodic load, and variable rotating load is carried out. The time-dependent Reynolds equation in two-dimension for incompressible fluid is solved numerically by the finite-difference method with a successive over relaxation scheme satisfying the Jakobsson-Floberg-Olsson boundary conditions, to obtain the hydrodynamic forces. Using these forces, the equations of motion are solved by the fourth-order Runge-Kutta method to predict the transient behaviour of the rotor. The analysis gives the orbital trajectory within the clearance circle.

Original languageEnglish
Pages (from-to)549-557
Number of pages9
JournalProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Volume222
Issue number4
DOIs
Publication statusPublished - 01-06-2008

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journal bearings
Journal bearings
Bearings (structural)
Transient analysis
grooves
Fluids
Water
Rigid rotors
water
Reynolds equation
rigid rotors
Runge-Kutta method
Runge Kutta methods
fluids
incompressible fluids
clearances
Nonlinear analysis
lubricants
Finite difference method
rotors

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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abstract = "The stability characteristics of water-lubricated journal bearings having multiple axial grooves are studied theoretically. These bearings can use the process fluid as the lubricant as in the case of feed water pumps. The process fluid (water) is fed from one end of the bearing, through the multiple axial grooves (groove angles may vary). A non-linear analysis of a rigid rotor supported on journal bearings under unidirectional constant load, unidirectional periodic load, and variable rotating load is carried out. The time-dependent Reynolds equation in two-dimension for incompressible fluid is solved numerically by the finite-difference method with a successive over relaxation scheme satisfying the Jakobsson-Floberg-Olsson boundary conditions, to obtain the hydrodynamic forces. Using these forces, the equations of motion are solved by the fourth-order Runge-Kutta method to predict the transient behaviour of the rotor. The analysis gives the orbital trajectory within the clearance circle.",
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