Numerical Analysis of CVT Transmission Lubrication system (Applied on CCH Tractor) - Part 2

A CFD approach is proposed here to characterize the flow field in the lubrication circuit. In this document an analysis method is outlined and different operating conditions were tested, in particular it was verified in which operating conditions a single-phase simulation is able to describe physical behavior of lubrication flow; in fact under determinate circumstances it can be hypnotized that the continuity of single-phase fluid domain is not verified so an oil gas mixture occurs. In order to accomplish the goal, some challenging issues were encountered such as the architectural complexity due to the large number of fluid paths and outlets, the critical meshing phase caused by the geometrical complexity and the difficult choice of numerical boundary in order to reflect at best the actual conditions of the physical behavior. The result are contextualized commenting the fluid dynamics phenomena involved and the influence parameters on flow rate distribution.In the study, the commercially available 3D numerical code ANSYS CFX was used, which is a fully 3D viscous turbulent flow solver based on a Finite Volume approach. For the solid modeling, Solidworks was used.