Description of Premixed Turbulent Combustion in a Channel with a Step Using Partially Stirred Reactor Models
R. A. Balabanov, V. V. Vlasenko, A. Yu. Nozdrachev
Zhukovsky Central Aerohydrodynamic Institute, Zhukovsky, Russia
Keywords: turbulent combustion model, chemical kinetics model
Abstract
Subsonic turbulent combustion in a premixed methane--air mixture in a model channel with a backward step is considered (P. Magre et al., ONERA, 1975-1989). The main physical mechanisms characteristic of combustion in gas turbine combustors are reproduced in experiments. A brief overview of previous numerical simulations of these experiments is given. New results from a numerical study of the stabilized combustion regime in this combustor are described. Several partially stirred reactor (PaSR) models for describing turbulent combustion are compared with a quasi-laminar approach. A model of variable turbulent Prandtl and Schmidt numbers is presented, and its influence on the reproduction of this flow in calculations is considered.
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