A Moving Spectral Element Approach to the Dynamically Loaded Journal Bearing Problem

✍ Scribed by D.Rh. Gwynllyw; A.R. Davies; T.N. Phillips

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 584 KB
• Volume: 123
• Category: Article
• ISSN: 0021-9991
• DOI: 10.1006/jcph.1996.0038

✦ Synopsis

If the lubrication approximation is not invoked, there is no option but to solve the full set of coupled equations A moving spectral element method is described for solving the dynamically loaded journal bearing problem. The journal bearing (kinematic and constitutive) governing the flow of the lugeometry comprises two eccentric cylinders with a lubricant occubricant, taking proper account of the moving parts of the pying the region between them. The inner cylinder (the journal) geometry. Until recently this task has proved too formidarotates and is also free to move under a time-dependent load, while ble a calculation, but with current computing power, comthe outer cylinder (the bearing) is stationary. Lubrication engineers bined with efficient and accurate numerical methods, the are interested in the dependence of the minimum oil film thickness on viscosity and viscoelasticity. The numerical method is validated calculation may be attempted. This is the subject the paby comparing the paths with those generated from lubrication theper addresses.

ory. A study of the effect the choice of cavitation model has upon

The complexity of the dynamically loaded journal bearthe journal's locus is made and is found to be critical. The possibility ing problem is only too evident if one considers a lubricant of an improved cavitation model is discussed.