Combustion modeling of turbulent jet diffusion H-2/air flame with detailedchemistry

In the present paper, turbulent jet diffusion flames are investigated numer ically using a finite volume method for the solution of the Navier-Stokes a nd reaction equations governing the problem. The method is based on a finit e volume discretization and the SIMPLE approach for velocity and pressure c oupling. For validation of the modeling of turbulence and numerical method, results are shown for an inert turbulent jet flow. Different versions of t he standard k-epsilon turbulence model including the Rodi correction are co mpared with experimental results by Panchapakesan and Lumley. The focus is on the investigation of an axisymmetric turbulent hydrogen/air diffusion fl ame using a time-dependent numerical model with a detailed chemical mechani sm. The chemical reactions are described by nine species and 16 or 17 pairs of elementary steps. The transport and thermodynamic physical properties f or each species and gas mixture are obtained from the CHEMKIN-II package. A n algebraic correlation closure (ACC) model is used for the coupling of tur bulence and chemistry. The temperature and major species (H-2, O-2, H2O, N- 2) distributions are in good agreement with the experimental measurements. The numerical results obtained from the detailed chemistry calculations dep end on how the turbulent diffusion coefficients are selected for the specie s and energy equations. (C) 2000 Elsevier Science Ltd. All rights reserved.