Study on hybrid combustion of aero-suspensions of boron-aluminum powders in a quiescent reaction medium
Journal of Loss Prevention in the Process Industries
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Afzalabadi, A., Poorfar, A., Bidabadi, M., Moghadasi, H., Hochgreb, S., Rahbari, A., & Dubois, C. (2017). Study on hybrid combustion of aero-suspensions of boron-aluminum powders in a quiescent reaction medium. Journal of Loss Prevention in the Process Industries, 49 645-651. https://doi.org/10.1016/j.jlp.2017.08.012
© 2017. The present research deals with a hybrid combustion of aluminum/boron dust particles in a heterogeneous quiescent reaction medium with spatially discrete heat sources. A developed thermal model is employed to estimate flame propagation speed in a reaction medium. The burning velocity and minimum ignition energy are studied parametrically as a function of dust concentration and particle diameter for different percentages of boron powder in a hybrid mixture of aluminum/boron dust cloud. The model shows that the addition of boron powder as a component of the mixture decreases the burning rate and causes a higher amount of minimum ignition energy needed for ignition, owing to the role of boron as a heat sink. Comparison of the simulation results with the available experimental data shows that the model captures the flame propagation speed as a function of particle concentration, except at very low concentrations.
External DOI: https://doi.org/10.1016/j.jlp.2017.08.012
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285745