Title: Large eddy simulation of combustion processes under gas turbine conditions

Authors: B. Wegner, A. Kempf, C. Schneider, A. Sadiki, M. Schafer

Addresses: Institute for Energy- and Powerplant Technology (EKT), Dept. of Mechanical Engineering, Darmstadt University of Technology, Germany. ' Institute for Energy- and Powerplant Technology (EKT), Dept. of Mechanical Engineering, Darmstadt University of Technology, Germany. ' Institute for Energy- and Powerplant Technology (EKT), Dept. of Mechanical Engineering, Darmstadt University of Technology, Germany. ' Institute for Energy- and Powerplant Technology (EKT), Dept. of Mechanical Engineering, Darmstadt University of Technology, Germany. ' Department of Numerical Methods in Mechanical Engineering, Dept. of Mechanical Engineering, Darmstadt University of Technology, Germany

Abstract: The method of large eddy simulation (LES) has a high potential to accurately predict complex turbulent flows. Gas turbine combustion systems feature a number of phenomena interacting with each other such as swirl with recirculation, complex turbulent mixing and combustion of premixed, non-premixed as well as partially premixed nature. We therefore tend to approach the simulation of real gas turbine combustors step by step. The aim of this paper is to document some of the progress made at EKT in assessing the capability of LES in flows separately exhibiting distinct features of gas turbine combustors. Some results from two configurations are presented and discussed: a non-confined isothermal swirl flow with precessing vortex core and a non-premixed bluff-body flame.

Keywords: large eddy simulation; swirl flow instability; non-premixed combustion; gas turbines.

DOI: 10.1504/PCFD.2004.004094

Progress in Computational Fluid Dynamics, An International Journal, 2004 Vol.4 No.3/4/5, pp.257 - 263

Published online: 29 Mar 2004 *

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