A large scale multi-fluid/dispersed phase approach for spray generation in aeronautical fuel injectors

Ghislain Blanchard (1) , Davide Zuzio (1) , Philippe Villedieu (1)

1 ONERA - The French Aerospace Lab [Toulouse]

Atomization is usually neglected in industrial numerical simulations of aeronautical combustors, despite the increasing physical fidelity of the LES approaches. The reason comes from the strong multi-scale nature of the problem: the typical space and time lengths are too small for their resolution to be afforded. The influence of the atomization process should however be taken in account when simulating unsteady processes like ignition and combustion instabilities. This work proposes a large scale numerical methodology (LSS, Large Scale Simulation) to simulate the unsteady assisted atomization process in industrial simulations of combustion chambers. The LSS approach involves a two-fluid resolution for the first stages of primary atomization and a dynamic local transfer of the liquid phase to a dispersed phase solver. An atomization model generates volume source terms for the multi-fluid solver which remove the liquid mass, while acting as an advanced adaptive injector for the dispersed phase solver. The methodology has been successfully tested on a planar sheared liquid sheet.

Mots clés: TWO-FLUID MODEL; DISPERSED PHASE; MULTISCALE; ATOMIZATION MODELLING

Domaines: Modélisation et simulation

Ghislain Blanchard, Davide Zuzio, Philippe Villedieu. A large scale multi-fluid/dispersed phase approach for spray generation in aeronautical fuel injectors. ICMF 2016, May 2016, FLORENCE, Italy. ⟨hal-01441814⟩