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Show In the following, details are given on each step followed . .---- ----..., ---.---..... ( EXP"ECROIMLDE"N TS )~\ FLUENT \ ) / DETAILED ) KINETIC MODEL --~ ------- I \ I ----~ NETWORK OF REACTORS I-----,~\. CHEMKIN ) ~/ I Fig. 2 : Scheme of the approach used. 5. FLOW FIELD AND KINETIC MODELLING The mathematical construction of models for burner development is performed by means of the code FLUENT reI. 4.32 together with a pre-processor for mesh generation. The results obtained are validated through cold aerodynamic measurements carried out on the test rig CAUX-F of Livorno. The isothermal simulations carried out have shown an excellent correspondence between prediction and the measurements carried out on the prototypes. Several simulations have been performed in order to evaluate drop trajectories and the presence and volume of recirculation zone. Figures 3-5 show a typical TEA burner flow field, with a hot, low oxygen concentration internal recirculation zone. There is a post combustion zone where a tertiary air field finishes the combustion of un oxidized species. The fate of primary, secondary and tertiary air streams have been investigated by numerically tracing the field with three different inert species (N 1, N2, N3). L. lJ TEA 8..0ER SDllATICf04 V.loc:1t.y VeetOt". (Hetel"./See) L_ : 7.602£+01 Lain I O.OOOE+OO Figure 3 : TEA bllrner flow field. 4 125700 |