Large-eddy simulation of lean hydrogen–methane turbulent premixed flames in the methane-dominated regime

A priori DNS study of applicability of flamelet concept to predicting mean concentrations of species in turbulent premixed flames at various Karlovitz numbers

“…Nevertheless, recall that Eq. ( 1) is commonly applied solely to evaluating the source term 6 C in the transport equation for ̃ [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], whereas mean concentrations of various species are calculated using Eq. (2).…”

“…In spite of the wide use of the flamelet concept coupled with a presumed PDF [10][11][12][13][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], such an approach requires further study. In particular, its validation has been mainly performed in a posteriori RANS [15,17,22] or LES studies [16,[18][19][20][21]23,24,27,28,[30][31][32], with the reported results showing limited capabilities of the approach for predicting mean concentrations of intermediate species such as H2 (in hydrocarbon-air flames), CO, OH, or CH2O (see Fig. 18 in Ref.…”

Computational investigation of rod-stabilized laminar premixed hydrogen–methane–air flames

“…The flow is treated as a continuous, multicomponent, compressible, and thermally-perfect mixture of gases that obeys the ideal gas equation of state. The governing equations are solved using a body-fitted, multi-block, adaptive mesh refinement, Case Fuel finite-volume framework that has been originally developed by Groth and co-researchers [13][14][15], and extended by Hernández Pérez et al [16][17][18][19]. For brevity the governing equations are omitted here, but they are fully described in axisymmetric form in Ref.…”

Formation, prediction and analysis of stationary and stable ball-like flames at ultra-lean and normal-gravity conditions

“…( 1)-( 5)) is solved using a body-fitted, multi-block, adaptive mesh refinement (AMR), finitevolume framework that has been originally developed by Groth and co-researchers [16][17][18][19][20][21], which has been extended to model the configuration under study. Applications of this framework to reacting flows have included laminar atmospheric [17,20] and high-pressure sooting [19,22] flames, as well as turbulent premixed [21,23] and non-premixed [18,20] flames, among others. Thermodynamic properties, transport properties and species net production/destruction rates are all evaluated utilizing the open-source package CANTERA [24,25].…”