Optimizing heat transfer, decreasing NOx production or improving flame stability, is a major objective of new generation combustors. A numerical tool capable of simulating the behaviour of a new system would greatly help in the design process of original, and environmentally friendly combustion systems. Large Eddy Simulations (LES), where larger turbulent scales of the flow field are explicitly resolved when only the effects of smaller ones are modelled constitute a promising tool. In this approach, the interactions between flow and combustion can be finely simulated as long as the different phenomena involved are correctly taken into account. Many flow configurations from academic to practical situations have been calculated with LES. While combustion modelling has been greatly improved during recent years, different models being now available (Flame Thickening Approach, G-Equation Method, Flame Surface Density Concepts, etc.), the interaction between radiation and combustion, which is a crucial issue, is still neglected. LES now gives the opportunity to achieve a better description of radiative heat transfers as hot burnt gases regions are clearly identified. The focus of the present study is to investigate this interaction. Therefore a powerful numerical tool is developped, based on the CORBA framework [1], which links two dedicated solvers. The first one called AVBP developed at CERFACS [2], is a LES solver, which solves the filtered compressible Navier-Stokes equations together with chemical species equations and energy balance equation on hybrid (structured and unstructured) 3D meshes. The radiation code, DOMASIUM [3], computes the radiative source term field using temperature and main species (CO2, H2O, CO) coming from the LES solver. The Correlated-K model, based on the cumulative distribution function of the absorption coefficient is combined with a Discrete Ordinates Method (DOM). Numerical simulations of a Lean Premixed Prevaporised burner [4] have been performed showing that radiation has a great impact on the flame dynamics and on the NOx production. Optimizing heat transfer, decreasing NOx production or improving flame stability, is a major objective of new generation combustors. A numerical tool capable of simulating the behaviour of a new system would greatly help in the design process of original, and environmentally friendly combustion systems. Large Eddy Simulations (LES), where larger turbulent scales of the flow field are explicitly resolved when only the effects of smaller ones are modelled constitute a promising tool. In this approach, the interactions between flow and combustion can be finely simulated as long as the different phenomena involved are correctly taken into account. Many flow configurations from academic to practical situations have been calculated with LES. While combustion modelling has been greatly improved during recent years, different models being now available (Flame Thickening Approach, G-Equation Method, Flame Surface Density Concepts, etc.), the interaction between radiation and combustion, which is a crucial issue, is still neglected. LES now gives the opportunity to achieve a better description of radiative heat transfers as hot burnt gases regions are clearly identified. The focus of the present study is to investigate this interaction. Therefore a powerful numerical tool is developped, based on the CORBA framework [1], which links two dedicated solvers. The first one called AVBP developed at CERFACS [2], is a LES solver, which solves the filtered compressible Navier-Stokes equations together with chemical species equations and energy balance equation on hybrid (structured and unstructured) 3D meshes. The radiation code, DOMASIUM [3], computes the radiative source term field using temperature and main species (CO2, H2O, CO) coming from the LES solver. The Correlated-K model, based on the cumulative distribution function of the absorption coefficient is combined with a Discrete Ordinates Method (DOM). Numerical simulations of a Lean Premixed Prevaporised burner [4] have been performed showing that radiation has a great impact on the flame dynamics and on the NOx production. References : [1] M. Henning and S. Vinoski, Advanced CORBA Programming with C++. Addison-Wesley, 1999 [2] L. Selle, G. Lartigue, T. Poinsot, R. Koch, K.-U. Schildmacher, W. Krebs, B. Prade, P. Kaufmann, D. Veynante, Combustion and Flame 137, 4, 489-505 (2004) [3] K. A. Jensen, J.-F. Ripoll, A. A. Wray, D. Joseph and M. El Hafi, Center for Turbulence Research, Proceeding of the Summer Program 2004 [4] Y. Sommerer, D. Galley, T. Poinsot, S. Ducruix, F. Lacas and D. Veynante, Journal of Turbulence, 5, 2004.