Moving textures: Simulation of a ring sliding on a textured liner

作者：Checo Hugo M^*; Ausas Roberto F; Jai Mohammed; Cadalen Jean Paul; Choukroun Franck; Buscaglia Gustavo C

来源：Tribology International, 2014, 72: 131-142.

DOI：10.1016/j.triboint.2013.12.013

• Piston ring
• Hydrodynamic lubrication
• Mass-conservative model
• Pocketed surface

Numerical simulations of the ring/liner contact in which the liner exhibits a periodic texture (pockets) are reported. The mass-conservative Elrod-Adams model is used to treat cavitation, and the dynamics of the ring is considered with a linear mass that corresponds to actual engine compression rings. The results, computed at a Siribeck number of 10(-3) and thus in the hydrodynamic lubrication regime, show that the ring profile determines whether pocketing is beneficial or not. For strongly non-conformal contacts pocketing is detrimental, but for quasi-conformal contacts friction reductions of up to 73% are predicted. The largest reduction in friction was obtained for textures consisting of close-packed arrays of circular pockets of diameter comparable to the size of the contact.

• 出版日期2014-4