Modelling practical combustion systems and predicting NOx emissions with an integrated CFD based approach英文电子书.pdfVIP

Computers and Chemical Engineering 26 (2002) 1171–1183 /locate/compchemeng Modelling practical combustion 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 Sp.A Produzione Ricerca, Via A. Pisano, 120-56122 Pisa, Italy b ENEL S.p .A. Produzione Ricerca, Via A. Pisano, 120-56122 Pisa, Italy c Dipartimento di Ingegneria Chimica, Chimica Industriale e Scienza dei Materiali, Uniersita` degli Studi di Pisa, Via Diotisali 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 practical combustion systems and NOx prediction is presented. It is based on 3D CFD simulation coupled to a postprocessor which yields reactor networks, extracted from 3D fields, as ‘equivalent’ simplified flow models for which it is possible to use a detailed reaction kinetics. 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 reactor network was extracted to perform the computation of the secondary product combustion species by means of a complex kinetics mechanism. An evaluation of the models was given comparing the measurement