Two-dimensional Numerical Study of Combustion and Pollutants Formation in Porous Burners
作者:
I. MALICO,
X.Y. ZHOU,
J.C.F. PEREIRA,
期刊:
Combustion Science and Technology
(Taylor Available online 2000)
卷期:
Volume 152,
issue 1
页码: 57-79
ISSN:0010-2202
年代: 2000
DOI:10.1080/00102200008952127
出版商: Taylor & Francis Group
关键词: Porous media;combustion;numerical modelling
数据来源: Taylor
摘要:
Two-dimensional numerical predictions of temperature profiles and pollutants formation in a porous burner are presented and validated through their comparison with available experimental data. The burner under study integrates a heat exchanger where water is heated for household applications. The Navier-Stokes, the energy and the chemical species transport equations are solved and a multislep kinetics mechanism (77 reactions and 26 species) is employed. Thermal nonequilibrium is accounted for and the discrete ordinates method, for the case of isotropic scattering, is used. Centreline temperature predictions are in good agreement with the experimental results. Predicted CO and NO emissions are compared to experimental results for a 5 kW thermal power and several excess air ratios. The model underpredicts the CO emissions and overpredicts the NO emissions. This tendency is stronger for richer mixtures. The effects of the excess air ratio, solid conductivity, convective heat transfer coefficient and radiative properties are investigated.
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