On the boundary conditions in multi-phase flow through the piston ring-cylinder liner conjunction
journal contributionposted on 19.05.2015, 09:59 by Hamed Shahmohamadi, Mahdi Mohammadpour, Ramin Rahmani, Homer Rahnejat, Colin Garner, S.J. Howell-Smith
Prediction of load capacity and friction depends on the assumed boundary conditions. The inlet comprises swirl and counter flows, admitting only a portion of the inward flow into the conjunctional gap. At the contact exit, the lubricant film ruptures with multi-phase flow through a cavitation region. Therefore, the boundary conditions affect the load carrying capacity and friction. A Navier–Stokes solution of multi-phase flow, including vapour transport is presented, with determined realistic boundary conditions. The evaluated boundaries agree with potential flow analysis satisfying compatibility conditions, not hitherto reported in literature. The investigation is extended to the determination of optimum compression ring contacting geometry.
The authors wish to express their gratitude to the Lloyd׳s Register Foundation (LRF) for the financial support extended to the International Institute for Cavitation Research. Thanks are also due to the Engineering and Physical Sciences Research Council (EPSRC) for the Encyclopaedic Programme Grant (EP/G012334/1); some of research findings of which are used in this paper. The technical and financial support of Capricorn Automotive is also acknowledged.
- Mechanical, Electrical and Manufacturing Engineering