1. LES/probability density function approach for the simulation of an ethanol spray flame.
- Author
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Heye, Colin, Raman, Venkat, and Masri, Assaad R.
- Subjects
LARGE eddy simulation models ,ETHANOL ,SPRAYING ,DENSITY functionals ,FLAME ,PROBABILITY theory ,COMBUSTION - Abstract
Abstract: A consistent probability density function (PDF) based combustion modeling approach for large eddy simulation of turbulent spray combustion is formulated. A Lagrangian Monte-Carlo approach for solving the PDF transport equation in the context of low-Mach number LES formulations is developed. The LES/PDF approach is used to simulate an experimental pilot-stabilized ethanol spray flame. In this particular flame, droplet evaporation occurs away from the flame front, leading to separation of the two processes. A high-temperature pre-flame zone with a stratified mixture is found to exist throughout the length of the flame. The high flow rate of the droplet-laden air prevents the flame front from propagating through this evaporated, but well-mixed fuel/air mixture. Comparison with experiments displayed large discrepancies concerning the droplet inflow conditions. In particular, the inflow turbulence is significantly modified by droplet-turbulence interactions in the injection pipe. [Copyright &y& Elsevier]
- Published
- 2013
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