Task

According to certification requirements, aircraft engines must function flawlessly even under negative acceleration (negative g) for a specified period of time, such as 10 seconds. The aim of this thesis is to investigate a suitable modeling method for predicting oil distribution in the tank under negative-g conditions. To this end, the physical effects occurring in the tank, as well as in the integrated oil-air separator (cyclone) and in the tank vent line, will first be examined and evaluated. The goal is to create a three-dimensional model of the tank in order to investigate future internal components for targeted oil management (optional). Both grid-based CFD methods and the SPH method (Smoothed Particle Hydrodynamics) with single- or two-phase modeling are under consideration, although computational complexity must be taken into account. Transient flow calculations should be performed to determine the oil distribution. Simple geometries and boundary conditions should be used to investigate the suitability of the modeling method. The complexity of the modeling should be investigated step by step, starting with simple methods. The thesis may be written in either German or English.