Numerical investigation of the heterogeneous combustion processes of solid fuels

FUEL

卷:141

Article

Alganash, Blaid¹  Paul, Manosh C.¹  Watson, Ian A.¹ 

[1] Univ Glasgow, Sch Engn, Syst Power & Energy Res Div, Glasgow G12 8QQ, Lanark, Scotland

关键词: CFD;    Multiphase flow;    Heterogeneous combustion;    Pulverized combustion;    NOx formation;   

DOI  :  10.1016/j.fuel.2014.10.060

来源: Elsevier

【 摘 要 】

Two-phase computational modelling based on the Euler-Euler was developed to investigate the heterogeneous combustion processes of biomass, in the solid carbon phase, inside a newly designed combustion chamber (Model 1). A transient simulation was carried out for a small amount of carbon powder situated in a cup which was located at the centre of the combustion chamber. A heat source was provided to initiate the combustion with the air supplied by three injection nozzles. The results show that the combustion is sustained in the chamber, as evidenced by the flame temperature. An axisymmetric combustion model (Model 2) based on the Euler-Lagrange approach was formulated to model the combustion of pulverized coal. Three cases with three different char oxidation models are presented. The predicted results have good agreement with the available experimental data and showed that the combustion inside the reactor was affected by the particulate size. A number of simulations were carried out to find the best values of parameters suitable for predicting NOx pollutants. (C) 2014 Elsevier Ltd. All rights reserved.

【 授权许可】

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