01796nab a2200205 4500 20260520000838.0 260224s2009 xxu Experimental and numerical investigation of gas-phase freeboard combustion. Main combustion process nov./dic. 2009 09/06/2010 ; 09/06/2010 10 p. ; 5773-5782 Transcripción del resumen del autor. Experimental data for velocity field, temperatures, and gas composition have been obtained from a 50 kW axisymmetric non-swirling natural gas fired combustion setup under two different settings. The reactor was constructed to simulate the conditions in the freeboard of a grate-fired boiler but under well-defined conditions. The experimental results are compared to computational fluid dynamics (CFD) modeling predictions, using the eddy dissipation model (EDM) as well as the eddy dissipation concept (EDC). The use of EDC allows for implementation of more advanced combustion schemes; we have tested the four-step global mechanism by Jones and Lindstedt ( Combust. Flame 1988, 73, 233-249), and the 16 species and 41 reaction skeletal mechanism by Yang and Pope ( Combust. Flame 1998, 112, 16-32). The CFD model captured the main features of the combustion process and flow patterns. The application of more advanced chemical mechanisms did not improve the prediction of the overall combustion process but did provide additional information about species (especially H2 and radicals), which is desirable for postprocessing pollutant formation. 6 Energy & fuels 23 ARTICULO Andersen, Jimmy 42343 Jensen, Peter Arendt 36023 Meyer, Knud Erik 42344 170817 170817 0 0 0 0 238636 BAAB BAAB 2026-03-05 200045671 0 200045671 2026-03-05 15:13:09 2026-03-05 ARTICULO