Abstract
The combustion of 81/19 Al/B agglomerates with a diameter of 320–780 μm in free fall in air was first studied using model monodisperse agglomerates. The dependence of the burning time on size was determined. Burning residue particles have been studied by morphological, chemical, mass, particle size, and elemental (EDS) analyses. It has been found that the essential distinctive features of the combustion mechanism of Al/B agglomerates compared to aluminum are a long combustion duration; a specific core-shell structure of the particles, with boron present in the core and absent in the shell; slight changes in particle mass and diameter during combustion.
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References
O. G. Glotov and G. S. Surodin, “Combustion of Aluminum and Boron Agglomerates Free Falling in Air. I. Experimental Approach,” Fiz. Goreniya Vzryva 55(3), 100–109 (2019). [Combust., Expl, Shock Waves 55 (3), 335–344 (2019)].
O. G. Glotov, G. S. Surodin, and O. N. Zhitnitskaya, “Combustion of Aluminum and Boron Model Agglomerates in Free Fall in Air,” in Energetic Materials. Synthesis. Characterization and Processing: 47th Int. Annu. Conf. of ICT, Karlsruhe, Germany, 2016, pp. 110–(1–12).
O. G. Glotov, V. E. Zarko, V. V. Karasev, T. D. Fedo-tova, and A. D. Rychkov, “Macrokinetics of Combustion of Monodisperse Agglomerates in the Flame of a Model Solid Propellant,” Fiz. Goreniya Vzryva 39(5), 74–85 (2003) [Combust., Expl, Shock Waves 39 (5), 552–562 (2003)].
O. G. Glotov and V. A. Zhukov, “Evolution of 100 μm Aluminum Agglomerates and Initially Continuous Aluminum Particles in the Flame of a Model Solid Propellant. I. Experimental Approach,” Fiz. Goreniya Vzryva 44(6), 52–60 (2008) [Combust., Expl., Shock Waves 44 (6), 662–670 (2008)].
O. G. Glotov, “Combustion of Spherical Agglomerates of Titanium in Air. I. Experimental Approach,” Fiz. Goreniya Vzryva 49(3), 50–57 (2013) [Combust., Expl., Shock Waves 49 (3), 299–306 (2013)].
L. Ya. Gradus, Handbook on Microscopic Dispersion Analysis (Khimiya, Moscow, 1979) [in Russian].
A. A. Afifi and S. P. Azen, Statistical Analysis: A Computer Oriented Approach (Academic Press, New York, 1972).
T. D. Fedotova, O. G. Glotov, and V. E. Zarko, “Application of Cerimetric Methods for Determining the Metallic Aluminum Content in Ultrafine Aluminum Powders,” Propell, Explos., Pyrotech. 32(2), 160–164 (2007).
O. G. Glotov, V. N. Simonenko, V. E. Zarko, R. K. Tukhtaev, T. F. Grigor’yeva, T. D. Fedotova, “Combustion Characteristics of Propellants Containing Aluminum-Boron Mechanical Alloy,” in Energetic Materials. Structure and Properties: 35th Int. Annu. Conf. of ICT (Karlsruhe, Germany, 2004), pp. 107-(1-16).
M. W. Beckstead, “Correlating Aluminum Burning Time,” Fiz. Goreniya Vzryva 41(5), 55–69 (2005) [Combust., Expl, Shock Waves 41 (5), 533–546 (2005)].
O. G. Glotov, “Combustion of Spherical Agglomerates of Titanium in Air. II. Results of Experiments,” Fiz. Goreniya Vzryva 49(3), 58–71 (2013) [Combust., Expl., Shock Waves 49 (3), 307–319 (2013)].
A. Macek, “Combustion of Boron Particles: Experiment and Theory,” in Fourteenth Symp. (Int.) on Combustion (1973), pp. 1401–1411.
S. Wang, M. Schoenitz, and E. L. Dreizin, “Combustion of Boron and Boron-Containing Reactive Composites in Laminar and Turbulent Air Flows,” Combust. Sci. Technol. 189 (4), 683–697 (2017); DOI: https://doi.org/10.1080/00102202.2016.1246441.
O. G. Glotov, G. S. Surodin, and A. M. Baklanov, “Combustion of Spherical Agglomerates of Titanium in Air. III. Motion of Agglomerates and the Effect of Blowing Velocity on Nanosized Combustion Products and Burning Time,” Fiz. Goreniya Vzryva 55(1), 49–62 (2019) [Combust., Expl., Shock Waves 55 (1), 43–55 (2019)].
V. N. Kornilov and E. N. Kondrat’ev, “Effect of Flame-out on Combustion of Small Particles in an Acoustically Oscillating Flow,” Fiz. Goreniya Vzryva 36(2), 10–16 (2000) [Combust., Expl, Shock Waves 36 (2), 164–170 (2000)].
A. Zenin, G. Kusnezov, and V. Kolesnikov, “Physics of Aluminum Particle Combustion at Zero-Gravity,” AIAA Paper No. 99-0696 (1999), pp. 1–6.
A. Zenin, G. Kusnezov, and V. Kolesnikov, “Physics of Aluminum Particle Combustion at Convection,” AIAA Paper No. 2000-0849 (2000), pp. 1–12.
A. Zenin, G. Kusnezov, and V. Kolesnikov, “Physics of Aluminum Particle Combustion at Ultrasonic Levitation,” AIAA Paper No. 2001-0472 (2001), pp. 1–9.
E. L. Dreizin, “On the Mechanism of Asymmetric Aluminum Particle Combustion,” Combust. Flame 117, 841–850 (1999).
O. G. Glotov and V. A. Zhukov, “Evolution of 100 μ Aluminum Agglomerates and Initially Continuous Aluminum Particles in the Flame of a Model Solid Propellant. II. Results,” Fiz. Goreniya Vzryva 44(6), 61–71 (2008) [Combust., Expl, Shock Waves 44 (6), 671–681 (2008)].
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Original Russian Text © O.G. Glotov, G.S. Surodin.
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Glotov, O.G., Surodin, G.S. Combustion of Aluminum and Boron Agglomerates Free Falling in Air. II. Experimental Results. Combust Explos Shock Waves 55, 345–352 (2019). https://doi.org/10.1134/S0010508219030122
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DOI: https://doi.org/10.1134/S0010508219030122