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Hydrodynamic lubricant film separation during co-directional and counter-directional rotations of disengaged wet clutch packs
journal contribution
posted on 2019-08-06, 08:39 authored by Nick MorrisNick Morris, Rishi Patel, Homer RahnejatThe parasitic drag losses incurred by wet clutches, used in transmission systems, can significantly
affect vehicular powertrain efficiency. This paper presents a novel implicit solution for hydrodynamic
parasitic drag losses of disengaged clutches. These are generated by conjunctional friction, taking into
account lubricant film separation during co-directional and counter-directional disc pair rotations.
Lubricant film rupture is considered through application of incipient reverse flow boundary condition,
which is representative of lubricant film separation. The results point to the operating conditions at
which significant power losses occur. In particular, the time efficient model is able to represent the
small losses incurred during co-directional rotation of disc pairs.
Funding
J.C. Bamford Excavators and Innovate UK.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Published in
Journal of Fluids EngineeringVolume
142Issue
1Publisher
American Society of Mechanical EngineersVersion
- AM (Accepted Manuscript)
Rights holder
© ASMEAcceptance date
2019-07-25Publication date
2019-10-04Copyright date
2020ISSN
0098-2202eISSN
1528-901XPublisher version
Language
- en