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Étude des paliers lisses mésalignés lubrifiés par des fluides à couple de contrainte.
- Source :
-
Mécanique & Industries . nov/dec2007, Vol. 8 Issue 6, p577-595. 19p. 3 Diagrams, 1 Chart, 17 Graphs. - Publication Year :
- 2007
-
Abstract
- A theoretical investigation of the static and dynamic behaviour of a rigid plain journal bearing lubricated by oils containing polymer additives considering misalignment defect is presented. The lubricating oils which are non-Newtonian are modelled as couple-stress fluids. According to the V. K. Stokes' micro-continuum theory which takes into account the size of particles, these fluids are characterized by two physical constants, namely the dynamic viscosity (μ) and a second characteristic responsible for the couple stress in the fluid (η). The effects of the couple-stress on the static and dynamic behaviour of the plain journal bearing are studied by defining of a dimensionless couple-stress parameter. The obtained results showed that the presence of additives in the lubricant has non- negligible effects on the static and dynamic performance characteristics as well as the dynamic stability and response of the journal bearing especially at high values of couple-stresses parameter, i.e. for higher chain length of the additive molecule. However, their influence on the side leakage flow is negligible except for high values of eccentricity ratio. [ABSTRACT FROM AUTHOR]
Details
- Language :
- French
- ISSN :
- 12962139
- Volume :
- 8
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Mécanique & Industries
- Publication Type :
- Academic Journal
- Accession number :
- 31604154
- Full Text :
- https://doi.org/10.1051/meca:2007082