@misc{LocciColinPoitouetal., author = {Locci, Carlo and Colin, Olivier and Poitou, Damien and Mauß, Fabian}, title = {A tabulated, flamelet based no model for large eddy simulations of non premixed turbulent jets with enthalpy loss}, series = {Flow, Turbulence and Combustion}, volume = {94}, journal = {Flow, Turbulence and Combustion}, number = {4}, issn = {1386-6184}, doi = {10.1007/s10494-014-9591-z}, pages = {691 -- 729}, abstract = {Three LES models devoted to the NO prediction in under-adiabatic furnaces are evaluated in this paper: the NORA (NO relaxation Approach) model, based on the NO relaxation towards equilibrium, the linear model (LM) which employs a linear relation to rescale the NO consumption rate, and a new model, DF-NORA, in which the linear approximation of the LM is replaced by a tabulation of the reaction rate as a function of a NO progress variable. To generate this table, NO relaxation complex chemistry calculations are used like in NORA, but the homogeneous reactor is replaced by a steady laminar diffusion flame. These models are validated on Sandia Flame D and on the flameless case of Verissimo et al. (Ener. Fuel. 25, 2469-2480 ([32])). For both cases, NORA underpredicts the NO production due to its insensitivity to strain, while LM overpredicts NO by a factor 2 on Flame D and a factor 13 on the flameless case. DF-NORA presents the best prediction with a maximal underprediction of 30\% on Flame D and an over-prediction of 30\% on the final NO yield of the flameless case. The impact of a radiative source term is also assessed on Flame D, showing a local decrease of NO by less than 7\% compared to the adiabatic calculation for the DF-NORA model.}, language = {en} }