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- Title
A new efficient flow continuity lubrication model for the cylinder liner‐piston ring based on the locally oriented roughness.
- Authors
Chen, Wen‐Bin; Liu, De‐Liang; Xu, Jiu‐Jun
- Abstract
The locally oriented roughness is a common feature of surface finished by a machining process, such as the surface of the cylinder liner, and may significantly influence lubrication characteristic. A homogenised transient Reynolds equation for the locally oriented roughness is derived. The Jacobsson–Floberg–Olsson (JFO) boundary conditions was implicitly incorporated into the transient Reynolds equation to ensure the mass flow conservation. On this foundation, a model for the transient lubrication in the cylinder liner‐piston ring considering the effects of the surface roughness and cavitation is established. Then, the results of model developed here are compared with those from the stochastic model by Patir and Cheng. and the effect of the direction of roughness on the lubrication properties is analysed. The homogenised transient Reynolds equation and the lubrication model developed here have great potential for understanding and optimising the transient lubrication considering the surface local roughness orientation, cavitation and starved lubrication.
- Subjects
REYNOLDS equations; ELASTOHYDRODYNAMIC lubrication; CAVITATION; SURFACE roughness; SURFACE finishing; CONSERVATION of mass; STOCHASTIC models
- Publication
Lubrication Science, 2024, Vol 36, Issue 4, p298
- ISSN
0954-0075
- Publication type
Article
- DOI
10.1002/ls.1680