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

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Abstract

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.

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Acknowledgments

M. Marchal, G. Couteau, S. Cazin, E. Cid, and all the people of the mechanical workshop are gratefully thanked for their technical support. This project was funded by the PFA-ASTRA program, a collaboration between the CNRS and ONERA institutions.

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Authors and Affiliations

  1. Université de Toulouse, INPT, UPS, IMFT (Institut de Mécanique des Fluides de Toulouse), Allée Camille Soula, 31400, Toulouse, France

    F. Moreau & R. Bazile

  2. CNRS, IMFT, 31400, Toulouse, France

    F. Moreau & R. Bazile

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  1. F. Moreau
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  2. R. Bazile
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Correspondence to R. Bazile.

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Moreau, F., Bazile, R. Evaporation of bi-component droplets in a heated, highly turbulent flow. Exp Fluids 53, 331–342 (2012). https://doi.org/10.1007/s00348-012-1292-6

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  • DOI: https://doi.org/10.1007/s00348-012-1292-6

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