Title: Combustion LES for premixed and diffusion flames

Authors: Michael Dusing, Andreas Kempf, Felix Flemming, Amsini Sadiki, Johannes Janicka

Addresses: Institute for Energy and Power Plant Technology, TU Darmstadt, Petersenstr. 30, Darmstadt D 64287, Germany. ' Institute for Energy and Power Plant Technology, TU Darmstadt, Petersenstr. 30, Darmstadt D 64287, Germany. ' Institute for Energy and Power Plant Technology, TU Darmstadt, Petersenstr. 30, Darmstadt D 64287, Germany. ' Institute for Energy and Power Plant Technology, TU Darmstadt, Petersenstr. 30, Darmstadt D 64287, Germany. ' Institute for Energy and Power Plant Technology, TU Darmstadt, Petersenstr. 30, Darmstadt D 64287, Germany

Abstract: This paper demonstrates the ability of large-eddy simulation (LES) to accurately predict turbulent combustion. A non-premixed bluff-body flame was simulated, relying on the conserved scalar approach and the laminar flamelet concept. The results were found to agree well with experimental data. A premixed flame, stabilised behind a rearward-facing step, was investigated with LES and a filtered G-equation model. The results were compared to experimental data to assess the accuracy of the approach. The filtered G-equation model was chosen based on the generalised regime diagram for turbulent combustion, which considers the influence of the LES filter width. A combination of both simulation methods introduced here gives the possibility to simulate partially premixed combustion.

Keywords: large-eddy simulation; diffusion flames; premixed flames; regime diagram; turbulent combustion prediction; laminar flamelet; filter width; partially premixed combustion.

DOI: 10.1504/PCFD.2005.007423

Progress in Computational Fluid Dynamics, An International Journal, 2005 Vol.5 No.7, pp.363 - 374

Published online: 18 Jul 2005 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article