A New Model for Large Eddy Simulations of Multi-Phase Turbulent Combustion
|A New Model for Large Eddy Simulations of Multi-Phase Turbulent Combustion
|Year of Publication
|Yaldizli, M, Li, Z, Jaberi, JA
|Proceedings of the 43rd AIAA/ASME/SAI/ASEE Joint Propulsion Conference
Numerical simulations of a spray-controlled lean premixed dump combustor are con- ducted via a two-phase large eddy simulation (LES) methodology. In this methodology, the velocity field is obtained by a high-order finite difference method. The subgrid gas- liquid combustion closure is based on the two-phase filtered mass density function (FMDF) method and the spray is modeled with a Lagrangian scheme. The effects of spray, fuel/air composition, and inflow/outflow conditions on the combustion are investigated. It has been found that the main features of the turbulence and combustion inside the dump combustor are very differently modified by the spray for different spray parameters. The LES/FMDF results also indicate the significance of the inflow and outflow conditions.