Large-eddy simulation of premixed turbulent combustion using a level-set approach

Large-eddy Simulation of Premixed Turbulent Combustion Using a Level-set Approach

In the present study, we have formulated the G equation concept for large-eddy simulation (LES) of premixed turbulent combustion. The developed model for the subgrid burning velocity is shown to correctly reflect Damköhler’s limits for largeand small-scale turbulence. From the discussion of the regime diagram for turbulent premixed combustion, it is shown that given a particular configuration o...

A Consistent Level Set Formulation for Large-Eddy Simulation of Premixed Turbulent Combustion

A consistent formulation of the G-equation approach for LES is developed. The unfiltered G-equation is valid only at the instantaneous flame front location. Hence, in a filtering procedure applied to derive the appropriate LES equation, only the instantaneous unfiltered flame surface can be considered. A new filter kernel is provided, which averages along the flame surface. The filter kernel is...

A level-set approach to large eddy simulation of premixed turbulent combustion By L. Duchamp de Lageneste AND H. Pitsch

Prediction of combustion-generated noise in non-premixed turbulent flames using large-eddy simulation

Noise generated from technical devices is an increasingly important problem. Jet engines in particular produce sound levels that are not only a nuisance, but may also impair hearing. The noise emitted by such engines is generated by different sources, such as jet exhaust, fans or turbines, and combustion. Increasing restrictions on the allowable noise-emission levels force manufacturers to desi...

Large-Eddy Simulation of Turbulent Combustion

In recent years, Large Eddy Simulation (LES) has been successfully applied to non-premixed and premixed turbulent combustion problems [1, 2, 3]. In most technical combustion applications, the pure non-premixed or premixed combustion models are no longer valid, since partially premixed combustion has to be taken into account. An example is the stabilization region of a lifted non-premixed flame....