Checo, Hugo M.
Ausas, Roberto F.
Buscaglia, Gustavo C.
Total Authors: 6
 Univ Sao Paulo, Inst Ciencias Matemat & Comp, BR-13560970 Sao Carlos, SP - Brazil
 INSA Lyon Pole Math, ICJ, F-69621 Villeurbanne - France
 RENAULT, F-92508 Rueil Malmaison - France
Total Affiliations: 3
Web of Science Citations:
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. (C) 2013 Elsevier Ltd. All rights reserved. (AU)