Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
INFLUENCE OF CAVITATION EFFECTS IN HYDRODYNAMIC BEARINGS ON ROTOR’S DYNAMIC BEHAVIOR
Submission Author:
Douglas Ramos , SP
Co-Authors:
Gregory Bregion Daniel, Douglas Ramos
Presenter: Douglas Ramos
doi://10.26678/ABCM.COBEM2017.COB17-0802
Abstract
The pursuit of mathematical models that correctly describe the dynamic behavior of rotating systems is constant in engineering. One of the models studied is the hydrodynamic lubrication for journal bearings, allowing to evaluation the hydrodynamic forces responsible for shaft’s support. This paper presents the inclusion of cavitation effect on oil film, in order to become the lubrication model more reliable and to verify how this effect modifies the rotor’s dynamic behavior. The verification was made evaluating the dynamic behavior of the rotor when considered different lubrication condition: Gümbell conditions to solve Reynolds equation and Elrod’s universal algorithm. The results obtained in this work show that the influence of the cavitation occurs mainly in critical operational condition when the rotor is near the instability threshold.
Keywords
Cavitation, Hydrodynamic lubrication, journal bearings
