Influence of droplet spatial distribution on spray evaporation

Lola Rousseau (1) , Olivier Rouzaud (1) , Christine Lempereur (1) , Mikael Orain (2) , Olivier Simonin (3)

1 DMPE, ONERA, Université de Toulouse [Toulouse]
2 DMPE, ONERA, Université de Toulouse [Mauzac]
3 IMFT - Institut de mécanique des fluides de Toulouse

In aero-engines, fuel is injected as a liquid which involves two-phase flow combustion. Consequently, different phenomena such as atomization, droplet dispersion by turbulence or spray evaporation impact combustion processes. In order to study spray combustion, an experimental test rig has been developed at ONERA to partially feature the flow conditions inside the combustion chamber of a turbo-reactor. Experimental campaigns have been conducted in non-reactive and reactive conditions to obtain an experimental database. The present paper focuses on the correlation between droplet density and the nearest-neighbour droplet distance obtained from the analysis of Mie scattering images under non-reactive conditions. Results show that the nearest-neighbour droplet distance varies linearly with the inverse square-root of mean spray density. Findings are compared with the theoretical law of Hertz-Chandrasekhar and the regular arrangement law.

Mots clés: Inter-droplet distance; Evaporation; Combustion; Spray

Mots clés: SPRAY; COMBUSTION; EVAPORATION; DISTANCE INTER-GOUTTES

Domaines: Mécanique des fluides [physics.class-ph]

Lola Rousseau, Olivier Rouzaud, Christine Lempereur, Mikael Orain, Olivier Simonin. Influence of droplet spatial distribution on spray evaporation. ILASS–Europe 2019, Sep 2019, Paris, France. ⟨hal-02966939⟩