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A priori Tabulation of Turbulent Flame Speeds via a Combination of a Stochastic Mixing Model and Flamelet Generated Manifolds

Zitieren Sie bitte immer diese URN: urn:nbn:de:0297-zib-10532
  • In this paper we propose a technique for a priori turbulent flame speed tabulation (TFST) for a given parameter space in standard combustion-regime diagrams. It can be used as a subgrid-scale (SGS) model in Large Eddy Simulation (LES). In a first step, stationary laminar flamelets are computed and stored over the progress variable following the ideas of flamelet generated manifolds (FGM). In a second step, the incompressible one-dimensional Navier-Stokes equations supplemented by the equation for the progress variable are solved on a grid that resolves all turbulent scales. Additionally, turbulent transport is implemented via the linear eddy model (LEM). The turbulent flame structures are solved until a statistically stationary mean value of the turbulent flame speed has been reached. The results are stored in a table that could be used by large scale premixed combustion models, e.g. front tracking schemes. Results are compared to an algebraic model and to direct numerical simulations (DNS).

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Metadaten
Verfasserangaben:Heiko Schmidt, Michael Oevermann, Rob J.M. Bastiaans, Alan R. Kerstein
Dokumentart:ZIB-Report
Freies Schlagwort / Tag:FGM; Flammenstrukturen; Verbrennung; stochastisches Turbulenzmodell; turbulente Brenngeschwindigkeiten
flame structures; flamelet generated manifolds; linear eddy model; turbulent flame speeds; turbulent premixed combustion
MSC-Klassifikation:65-XX NUMERICAL ANALYSIS / 65Lxx Ordinary differential equations / 65L80 Methods for differential-algebraic equations
65-XX NUMERICAL ANALYSIS / 65Mxx Partial differential equations, initial value and time-dependent initial- boundary value problems / 65M06 Finite difference methods
CCS-Klassifikation:J. Computer Applications / J.2 PHYSICAL SCIENCES AND ENGINEERING
PACS-Klassifikation:00.00.00 GENERAL / 02.00.00 Mathematical methods in physics / 02.50.-r Probability theory, stochastic processes, and statistics (see also section 05 Statistical physics, thermodynamics, and nonlinear dynamical systems) / 02.50.Ey Stochastic processes
40.00.00 ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS / 47.00.00 Fluid dynamics (for fluid dynamics of quantum fluids, see section 67; see also section 83 Rheology; for sound generation by fluid flow, see 43.28.Ra-in Acoustics Appendix) / 47.70.-n Reactive and radiative flows (see also 82.33.Vx Reactions in flames, combustion and explosion; 82.33.Xj Plasma reactions (including flowing afterglow and electric discharges); 82.33.Ya Chemistry of MOCVD and other vapor deposition methods in Physical chem / 47.70.Pq Flames; combustion
Datum der Erstveröffentlichung:14.01.2008
Schriftenreihe (Bandnummer):ZIB-Report (08-02)
ISSN:1438-0064
ZIB-Reportnummer:08-02
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