Multiphysic Atomization with Diffused Interfaces for Real Air-blasted engiNes – MADIRAN

This project aims at studying air-assisted atomization and spray formation for aircraft engines in a complex multi-physic environment, with the use of advanced numerical methods. Large Eddy Simulations of reactive, two-phase and multi-components flows will allow to put light on atomization processes occurring in confined environments, accounting for evaporation and combustion. A diffuse interface method is implemented in the reactive, unstructured, massively parallel solver AVBP considered in this project, and will allow to predict the primary atomization processes. An Eulerian-Lagrangian transition model will be considered, in which primary droplets resulting from the atomization are described through a Lagrangian formalism, with associated diameters, velocities, directions resulting from the local physics. This project also intends to develop a robust and efficient Riemann solver for a parallel and unstructured context. After validation of the numerical methodology, the impact of evaporation and combustion on the primary atomization will be thoroughly investigated, both on fundamental and academic cases, as well as on real injectors configurations. These physical analyses of atomization in its complex environment will allow to provide helpful information to feed low-order models intended to engineers, to characterize a spray in its real environment from a spray obtained in a cold and non-reactive conditions.