Evaporation of bi-component droplets in a heated, highly turbulent flow

Florian Moreau (1) , Rudy Bazile (1)

1 IMFT - Institut de mécanique des fluides de Toulouse

This work aims to understand the phenomena that occur in a combustion chamber where multi-component fuel droplets are injected. Many evaporation models exist but the influence of turbulence on spray vaporization is not yet well understood. This study gives a useful database to improve these models. The objective of the work is to measure the dispersion and the evaporation of bi-component (octane/3-pentanone) droplets and the resulting vapor mixing in a well-known, heated, highly turbulent channel flow. The carrier flow shows high turbulence levels, flat profiles for the mean velocity and the velocity fluctuations. The injected droplets have a large variety of behaviors due to the large polydispersion and to the turbulence. The evolution of 3-pentanone liquid concentration, mass flux, and droplet clusters are described. Mean concentration, fluctuations of concentration, and mixing of the vapor phase are characterized.

Mots clés: Turbulence generator; Bi-component droplets; Evaporation; PLIF

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

Florian Moreau, Rudy Bazile. Evaporation of bi-component droplets in a heated, highly turbulent flow. Experiments in Fluids, 2012, vol. 53, pp. 331-342. ⟨10.1007/s00348-012-1292-6⟩. ⟨hal-00957385⟩