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International Journal of Energy for a Clean Environment
SJR: 0.151 SNIP: 0.224 CiteScore™: 0.21

ISSN Print: 2150-3621
ISSN Online: 2150-363X

International Journal of Energy for a Clean Environment

Formerly Known as Clean Air: International Journal on Energy for a Clean Environment

DOI: 10.1615/InterJEnerCleanEnv.v8.i3.40
pages 239-257

COMPLEX CHEMISTRY SIMULATION OF FLOX®: FLAMELESS OXIDATION COMBUSTION

H. Schutz
1DLR Institute of Combustion Technology, Linder Höhe, 51147 Köln, Germany
R. Luckerath
DLR Institute of Combustion Technology, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
B. Noll
DLR Deutsches Zentrum für Luft- und Raumfahrt e. V. Institut für Verbrennungstechnik; DLR Institute of Combustion Technology, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
Manfred Aigner
German Aerospace Center (DLR), Institute of Combustion Technology, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany

ABSTRACT

The major concern of the present paper is the numerical simulation of the flow and combustion of methane in a FLOX® combustor at high-pressure operating conditions. The purpose is to investigate the ability of the FLOX® concept to be used in a (micro) gas turbine combustor. FLOX® combustion is a highly turbulent and high-velocity combustion process, which is strongly dominated by chemical nonequilibrium effects.
In a turbulent flow, the key aspects of a combustion model are twofold: (i) chemistry and (ii) turbulence/chemistry interaction. In the FLOX® combustion, we find that both physical mechanisms are of equal importance. Throughout our simulations, we use the complex finite rate chemistry scheme GRI3.0 for methane and a simple partially stirred reactor (PaSR) model to account for the turbulence effect on the combustion. The computational results agree very well with experimental data obtained at DLR test facilities. For a pressure level of 20 bar, computational results for a burner load of 417 kW and an air-to-fuel ratio of λ = 2.16 are presented and compared to experimental data.