Particle Equilibrium Composition model for iron dust combustion

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Abstract

Flame propagation of iron powder in air is numerically studied. The present work introduces a chemical equilibrium model, which allows a detailed representation of the combustion products, phase transitions and detailed thermodynamics of the condensed phase. First, to validate the combustion of a single particle, numerical laser ignited single particle studies are performed and compared to experiments, where a very good agreement is obtained. A second series of simulations is performed on the propagation of laminar flames in iron/air mixtures for a wide range of equivalence ratios (φ = 0.2–1.8) using mono-dispersed particles having a diameter of 10 µm. Based on these simulations a multi-staged combustion process is identified, where each stage can be related to the formation of a different oxide. More importantly, the significance of including at least Fe3O4 in the model is demonstrated. This species contributes significantly to the burning velocity and flame temperature, as it is responsible for more than 25% of the total energy which can be released.
Original languageEnglish
Article number100115
Number of pages10
JournalApplications in Energy and Combustion Science
Volume13
DOIs
Publication statusPublished - Mar 2023

Funding

We would like to express our thanks to T. Hazenberg for his insightful discussions and feedback. Special thanks should be given to L. Choisez and Y. Wu from Max–Planck-Institut für Eisenforschung Düsseldorf for the exchange of views regarding the properties of iron(-oxides). This project has received funding from the European Research Council (ERC) under the European Union’ Horizon 2020 research and innovation program under Grant Agreement no. 884916. We would like to express our thanks to T. Hazenberg for his insightful discussions and feedback. Special thanks should be given to L. Choisez and Y. Wu from Max–Planck-Institut für Eisenforschung Düsseldorf for the exchange of views regarding the properties of iron(-oxides). This project has received funding from the European Research Council (ERC) under the European Union’ Horizon 2020 research and innovation program under Grant Agreement no. 884916 .

FundersFunder number
European Union's Horizon 2020 - Research and Innovation Framework Programme884916
Max–Planck-Institut für Eisenforschung
European Research Council

    Keywords

    • Iron
    • Dispersed-phase flame
    • Chemical equilibrium
    • Burning velocity

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