Non-premixed combustion arises in many important applications such as industrial furnaces,
rocket engines and Diesel engines. The widespread use of nonpremixed combustion is the major
motivation for the numerous model approaches to their numerical simulation. Whereas until
recently most numerical studies were based on the RANS model, nowadays more and more
studies are using Large Eddy Simulation (LES), see e.g Pitsch, [9], for an overview. Although
the chemical reactions typically take place at scales which are not resolved in LES, it has been
found that LES provides signi¯cant advantages over RANS in nonpremixed combustion. This is
attributed to a better prediction of the large scale turbulent mixing, and a better description of
turbulence-combustion interactions because the large coherent structures are explicitly computed.
In the present paper LES will be applied to nonpremixed combustion. The emphasis is on
a numerical study of the LES where critical components such as the inlet boundary conditions,
the modelling of the subgrid scale mixture fraction variance and the numerical scheme for the
mixture fraction equations are investigated.
Original languageEnglish
Publication statusPublished - 24 May 2007

Publication series

NameLarge-Eddy Simulation for Advanced Design of Combustion Systems: Methods, Tools and Applications

    Research areas

  • Combustion, Flamelet Model

ID: 1641514