Modeling quenching distance and flame propagation speed through an iron dust cloud with spatially random distribution of particles |
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| Institution: | 1. IVG, Institute for Combustion and Gas Dynamics – Fluid Dynamics, University of Duisburg-Essen, Germany;2. IVG, Institute for Combustion and Gas Dynamics – Reactive Fluids, University of Duisburg-Essen, Germany;3. School of Chemistry, Tel Aviv University, Tel Aviv, Israel;4. Department of Natural Sciences, The Open University of Israel, Raanana, Israel;5. CENIDE, Center for Nanointegration Duisburg-Essen, Germany |
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| Abstract: | In this research combustion of iron dust particles in a medium with spatially discrete sources distributed in a random way has been studied using a numerical approach. A new thermal model is generated to estimate flame propagation speed and quenching distance in a quiescent reaction medium. The flame propagation speed is studied as a function of iron dust concentration and particle diameter. The predicted propagation speeds as a function of these parameters are shown to agree well with experimental measurements. In addition, the minimum ignition energy has also been investigated as a function of equivalence ratio and particle diameter. The quenching distance has been studied as a function of particle diameter and validated by the experiment. Considering random distribution of particles, the obtained results provide more realistic and reasonable predictions of the combustion physics compared to the results of the uniform distribution of particles. |
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| Keywords: | Flame propagating speed Quenching distance Iron Random particle distribution Heterogeneous combustion |
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