Summary
This paper investigates the process of partially premixed turbulent combustion in situations where the fuel is provided either as a liquid spray or a purely gaseous stream. In the former case, two-dimensional direct numerical simulations in association with a Lagrangian solver for the dispersed vaporizing phase are employed. By varying the spray properties in terms of droplet density and size, many different flame topologies and combustion modes are observed. In the latter case, the flamelet approach for turbulent partially premixed combustion is employed, requiring the definition of appropriate laminar model flames describing the partially premixed flame structure. To this end, direct numerical simulations of purely gaseous laminar triple flames are performed using a reduced ten-step methane/air mechanism. The resulting chemical structure of these triple flames is analyzed and found to be predominantly premixed in nature.
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Herrmann, M., Binninger, B., Peters, N., Réveillon, J., Vervisch, L. (2003). Modeling Partially Premixed Turbulent Combustion. In: Hirschel, E.H. (eds) Numerical Flow Simulation III. Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM), vol 82. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45693-3_9
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DOI: https://doi.org/10.1007/978-3-540-45693-3_9
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