A lumped parameter and CFD combined approach for the lubrication analysis of a helical gear transmission

Abstract This paper proposes a combined 1D-3D approach for the lubrication analysis of standard transmission including two helical gears. A lumped parameter model entire system is developed to predict flow distribution within circuit and localized pressure drops along lines. considers geometrical features real system, it combines experimental characteristic curves main hydraulic components. The steady-state condition investigated, corresponding provided as boundary three-dimensional CFD model. overset mesh method employed address instantaneous position gears in contact region Volume Fluid (VOF) assesses multi-phase phenomenon. turbulent behavior described by two-equation realizable k-ε model, incompressible assumption made both oil air. effect different nozzles configurations on efficiency analyzed internal fluid-dynamics investigated point out path. numerical results are discussed terms volume fraction teeth, passive torques at shafts associated power losses under specific operating conditions.