Large Eddy Simulation of turbulent combustion in a stagnation point reverse flow combustor using detailed chemistry

Extension of the Eddy Dissipation Concept for turbulence/chemistry interactions to MILD combustion

“…They showed that MILD reaction zones are highly-convoluted, contorted and pancake-like structures, spread over a large portion of the computational domain resulting in a relatively broad reaction zone. By means of a systematic comparison between numerical simulations and DNS data, the authors showed that the PSR modelling paradigm is applicable in the (RANS and LES) modelling of MILD combustion, as also demonstrated in [39,40]. Based on this observation, the use of Eq.…”

Computational Singular Perturbation Method and Tangential Stretching Rate Analysis of Large Scale Simulations of Reactive Flows: Feature Tracking, Time Scale Characterization, and Cause/Effect Identification. Part 2, Analyses of Ignition Systems, Laminar and Turbulent Flames

“…The measured mean species mass fraction, temperature and velocity taken 4 mm downstream of the burner exit are used as boundary condition for the simulation. A reduced skeletal mechanism KEE58 [97] with 17 species and 58 reactions is used in combination with the Laminar Finite Rate (LFR) combustion model [98,99]. The Laminar Finite Rate (LFR) model is used as combustion model.…”

On the Influence of Kinetic Uncertainties on the Accuracy of Numerical Modeling of an Industrial Flameless Furnace Fired With NH3/H2 Blends: A Numerical and Experimental Study

“…Since the main challenges associated with ammonia combustion are NOx emissions and ammonia slip, such campaign aimed at finding a configuration with optimal trade-off between the two, and at testing fuel flexibility in the ULB flameless furnace. The second goal consists in using the data gathered in this study to extend the validation of existing numerical models for turbulence/chemistry interaction (partially stirred reactor-PaSR model), which was extensively validated for other fuels, in traditional (Chomiak and Karlsson, 1996;Hua et al, 2005;Sabelnikov and Fureby, 2013;Duwig and Iudiciani, 2014) and flameless/MILD conditions (Ferrarotti et al, 2018;Ferrarotti et al, 2019;Amaduzzi et al, 2020;Li et al, 2021). The last objective is to verify whether the origin of the deviation between experimental measurements and model predictions for NOx emission is attributable to uncertainty in ammonia kinetics.…”