Static mesh adaptation for reliable large eddy simulation of turbulent reacting flows
نویسندگان
چکیده
The design challenge of reliable lean combustors needed to decrease pollutant emissions has clearly progressed with the common use experiments as well large eddy simulation (LES) because its ability predict interactions between turbulent flows, sprays, acoustics, and flames. However, accuracy such numerical predictions depends very often on user's experience choose most appropriate flow modeling and, more importantly, proper spatial discretization for a given computational domain. present work focuses last issue proposes static mesh refinement strategy based physical quantities. To do so, combination sensors dissipation production kinetic energy coupled flame-position probability is proposed detect regions interest where physics happens grid adaptation recommended good LES predictions. Thanks measures, local resolution can be achieved in these zones improving overall while, eventually, coarsening everywhere else domain reduce cost. detailed validated two reacting-flow problems: fully premixed bluff-body stabilized flame, i.e., VOLVO test case, partially swirled PRECCINSTA burner, which closer industrial configurations. For both cases, comparisons results experimental data underline fact that flame stabilization, hence computed velocity temperature fields, are strongly influenced by quality significant improvement obtained applying strategy.
منابع مشابه
Large-Eddy Simulation of Turbulent Reacting Flows
Numerical simulations of combustion in aircraft engines is quite complex, as it requires an adequate description of liquid fuel injection, liquid fuel atomization, drop breakup, drop dynamics, and evaporation, large-scale turbulent fuel air mixing, small scale molecular fuel air mixing, chemical reactions, and turbulence/chemistry interactions. In the present paper, we have identified three of ...
متن کاملLarge-Eddy Simulation of Reacting Turbulent Flows in Complex Geometries
Large-eddy simulation (LES) has traditionally been restricted to fairly simple geometries. This paper discusses LES of reacting flows in geometries as complex as commercial gas turbine engine combustors. The incompressible algorithm developed by Mahesh et al. (J. Comput. Phys., 2004, 197, 215–240) is extended to the zero Mach number equations with heat release. Chemical reactions are modeled us...
متن کاملLarge Eddy Simulation for Turbulent Flows
This thesis is concerned with one of the most promising approaches to the numerical simulation of turbulent flows, the Large Eddy Simulation (LES) in which the large scales of the flow are calculated directly, while the interactions with the small scales are modeled. Specifically, we analyze two new LES models, introduced in [30] and [51]. First, we sketch the derivation of the LES model introd...
متن کاملLarge-eddy simulations of turbulent reacting stagnation point flows
A methodology for solving unsteady premixed turbulent flame propagation problems in high Reynolds number (Re), high Damkohler number (Da) spatially evolving flows is developed. The method is based on Large-Eddy Simulation (LES) with a subgrid combustion model based on the Linear-Eddy Model (Kerstein, 1991). An inter-LES cell burning mechanism has been added to the present formulation to account...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2021
ISSN: ['1527-2435', '1089-7666', '1070-6631']
DOI: https://doi.org/10.1063/5.0040719