Modeling Oil Flows in Engine Sumps: Drop Dynamics and Wall Impact Simulation

摘要

A computational preliminary design tool has been developed to help simulate drop-related processes that take place in an oil sump of a gas turbine engine accounting for drop motion, deformation, breakup, and drop/wall interactions including wall film impact and potential splashing. Aerodynamic interactions with the gas phase are considered using an exact solution of the Navier-Stokes equations to approximate the annular gas flow. Detailed results for the baseline case that attempts to replicate the conditions found in a typical oil sump of a turbofan engine are presented. In addition, the results of more general parametric studies utilizing a simplified geometry that investigated the effects of changing various parameters are discussed.