Tabulation of turbulent burning rates via a combination of a stochastic mixing model and tabulated chemistry

H. Schmidt, M. Oevermann, R.J.M. Bastiaans, A.R. Kerstein

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

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).
Original languageEnglish
Pages (from-to)1-17
JournalZIB Report
Volume08
Issue number02
Publication statusPublished - 2008

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