Large eddy simulation of pressure and dilution-jet effects on soot formation in a model aircraft swirl combustor

Abstract

Large eddy simulation of pressure and dilution-jet effects on soot formation in a model aircraft swirl combustor, Combust. Flame 192 (2018) 452-472

Effect of soot model, moment method, and chemical kinetics on soot formation in a model aircraft combustor

“…While there has been considerable progress in the modeling of soot formation processes [8,9] , the application of these advances to realistic combustor configurations still remain sparse. Previous studies [10][11][12][13][14] have shown that while the overall features of the flow can be captured rather accurately, prediction of soot volume fraction is highly sensitive to a host of conditions including small errors in flow field predictions and the choice of soot evolution models.…”

“…The study is based on the DLR ethylene/air combustor [32] , which is comparable in design to a richquench-lean (RQL) type combustor used for aircraft propulsion. This combustor has also been studied using specific methods in the past [10][11][12][13] , which will provide additional bases for comparison. Here, three different soot inception models and three different soot description approaches are compared with experimental data.…”

“…Further details on the implementation are provided in [10] . Transport equations for scalars (mixture fraction Z , progress variable C , heat loss parameter H , and PAH mass fraction Y PAH ) can be generically written as:…”

“…Therefore, the soot particles observed are generated due to local mixing inefficiencies. Further details about the configuration, computational domain, grid refinement process, and the statistical averaging process can be found in [10,11,32,33] .…”

“…This solver has previously been applied to simulating complex reacting flows [10,36] . Dynamic models were used for all subfilter quantities [37] .…”