Abstract
A quenching/sampling method was used to study the evolution of monodisperse 100-µm aluminum agglomerates and continuous particles in the flame of combustion products — composite propellant at a pressure of 0.7–8 MPa. The particle residence time in the flame was varied in the range 6–170 msec, whereas the calculated time of their combustion was ≈25 msec. The evolution of a burning particle is related to the consumption of metallic aluminum and the deposition of oxide in the form of a cap, which, after complete combustion of aluminum, is transformed to the final spherical oxide particle. The density of the final oxide particles was measured. The ratio of the diameters and masses of the initial metal particle and the final oxide particles was determined. Data on particle fragmentation during combustion were obtained by comparing the numbers of the initial metal particles and the final oxide particles. Considerable differences in the combustion behavior of the agglomerates and continuous particles of size 100 µm were not found. It was established that the smaller the size of the burning particle the less oxide is deposited on the particle and the more oxide is carried away in the form of oxide smoke. For 100-µm particles, the fraction of deposited oxide was found to be ≈0.1 of the total mass of oxide formed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
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,” Combust., Expl., Shock Waves, 44, No. 6, 662–670 (2008).
O. G. Glotov and V. A. Zhukov, “Combustion evolution of 100 micron aluminum agglomerates and monolithic aluminum particles in flame of model solid propellant,” in: Energetic Materials — Insensitivity, Ageing, Monitoring, Proc. 37th Int. Annu. Conf. of ICT (Karlsruhe, Germany, June 27–30, 2006) Fraunhofer-Institut fur Chem. Technol., Karlsruhe (2006), pp. 123-1–123-16.
O. G. Glotov, D. A. Yagonikov, V. S. Vorobev, V. E. Zarko, and V. N. Simonenko, “Ignition, combustion, and agglomeration of encapsulated aluminum particles in a composite solid propellant II. Experimental studies of agglomeration,” Combust., Expl., Shock Waves, 43, No. 3, 320–333 (2007).
H. Krier, R. L. Burton, and J. C. Melcher, “The rates and structure of aluminum combustion in a solid rocket motor medium,” Tech. Report., Depart. of Mech. and Indust. Eng., Univ. of Illinois at Urbana-Champaign, Urbana II 61801, UILU-eng 2001-4012 (2001).
P. F. Pokhil, A. F. Belyaev, Yu. V. Frolov, V. S. Logachev, and A. I. Korotkov, Combustion of Metal Powders in Active Media [in Russian], Nauka, Moscow (1972).
O. G. Glotov, V. E. Zarko, V. V. Karasev, T. D. Fedotova, and A. D. Rychkov, “Macrokinetics of combustion of monodisperse agglomerates in the flame of a model solid propellant,” Combust., Expl., Shock Waves, 39, No. 5, 552–562 (2003).
S. P. Yatsenko, V. I. Kononenko, and A. L. Sukhman, “Experimental studies of the temperature dependence of surface tension and density of tin, indium, aluminum, and gallium,” Teplofiz. Vysok. Temp., 10, No. 1, 66–71 (1972).
A. Zenin, G. Kusnezov, and V. Kolesnikov, “Physics of aluminum particle combustion at zero-gravity,” AIAA Paper No. 99-0696, 1–6 (1999).
A. Zenin, G. Kusnezov, and V. Kolesnikov, “Physics of aluminum particle combustion at convection,” AIAA Paper No. 2000-0849, 1–12 (2000).
M. W. Beckstead, “Correlating aluminum burning times,” Combust., Expl., Shock Waves, 41, No. 5, 533–546 (2005).
O. G. Glotov, “Condensed combustion products of aluminized propellants IV. Effect of the nature of nitramines on aluminum agglomeration and combustion efficiency,” Combust., Expl., Shock Waves, 42, No. 4, 436–449 (2006).
A. A. Afifi and S. P. Azen, Statistical Analysis: A Computer-Oriented Approach, Academic Press, New York (1979).
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 6, pp. 61–71, November–December, 2008.
Rights and permissions
About this article
Cite this article
Glotov, O.G., Zhukov, V.A. The evolution of 100-µm aluminum agglomerates and initially continuous aluminum particles in the flame of a model solid propellant. II. Results. Combust Explos Shock Waves 44, 671–680 (2008). https://doi.org/10.1007/s10573-008-0101-2
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10573-008-0101-2