Computers and Chemical Engineering 26 (2002) 1171–1183
pchemeng
Modelling bustion systems and predicting NOx
emissions with an integrated CFD based approach
M. Falcitelli a, S. Pasini b, L. Tognotti c,*
a Consorzio Pisa Ricerche, ENEL Produzione Ricerca, Via A. Pisano, 120-56122 Pisa, Italy
b ENEL . Produzione Ricerca, Via A. Pisano, 120-56122 Pisa, Italy
c Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali, Uni6ersita` degli Studi di Pisa, Via Diotisal6i 2,
56100 Pisa, Italy
Received 5 March 2001; received in revised form 21 November 2001; accepted 21 November 2001
Abstract
An integrated methodology for the simulation of bustion systems and NOx prediction is presented. It is based on
3D CFD simulation coupled to a postprocessor which yields works, extracted from 3D fields, as ‘equivalent’ simplified
flow models for which it is possible to use a detailed reaction ics. The study of two glass melting furnaces is presented to
illustrate the methodology. The furnaces were experimentally characterised, then CFD simulations were performed, setting the
suitable boundary conditions for the radiative heat exchange and the sub-model for the chemistry. From each CFD simulation,
a chemical work was extracted to perform putation of the secondary bustion species by means of
plex ics mechanism. An evaluation of the models was paring the measurements with the temperature of the
CFD field and the NOx prediction. Finally, an estimate of the effect of some NOx reducing techniques was given. © 2002 Elsevier
Science Ltd. All rights reserved.
Keywords: Combustion systems; Nitric oxides; CFD; Detailed ics; Chemical reactors; Glass furnaces
1. Introduction For the methodology shown in the present work, the
choice is to perform on the first a CFD simulation on
Simulation of bustion system using a fine grid using a ic mechanism describing the
computational fluid dynamics (CFD) modelling is still a oxidation of the main speci
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