CUED Publications database

Analysis of high pressure premixed flames using Equivalent Reactor Networks for predicting NOx emissions

Lyra, S and Cant, RS (2013) Analysis of high pressure premixed flames using Equivalent Reactor Networks for predicting NOx emissions. Fuel, 107. pp. 261-268. ISSN 0016-2361

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Abstract

This paper describes a computational study of lean premixed high pressure methane-air flames, using Computational Fluid Dynamics (CFD) together with a reactor network approach. A detailed chemical reaction mechanism is employed to predict pollutant concentrations, placing emphasis on nitrogen oxide emissions. The reacting flow field is divided into separate zones in which homogeneity of the physical and chemical conditions prevails. The defined zones are interconnected forming an Equivalent Reactor Network (ERN). Three flames are examined for which experimental data is available. Flame A is characterised by an equivalence ratio of 0.43 while Flames B and C are richer with equivalence ratios of 0.5 and 0.56 respectively. Computations are performed for a range of operating conditions, quantifying the effect in the emitted NOx levels. Model predictions are compared against the available experimental data. Sensitivity analysis is performed to investigate the effect of the network size, in order to define the optimum number of reactors for accurate predictions of the species mass fractions. © 2012 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Equivalent reactor network Methane-air high pressure flames NOx emissions
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:14
Last Modified: 16 Dec 2014 19:07
DOI: 10.1016/j.fuel.2012.12.066