Abstract
The combustion zone of a steady-state laminar diffusion flame of aluminum particles of diameter 4.8 µm at a metal weight percentage of 0.4 kg/m3 was studied by atomic and molecular emission spectra. Absolute measurements of the luminosity of the sequence of bands due to AlO made it possible to determine the gas-phase temperature (3200± 100 K) and the AlO vapor concentration [(1.5 ± 0.5) · 1021 m−3] at the flame front. From an analysis of measurement data on the intensity and contour of the resonance line of aluminum, it is concluded that the metal particles burn individually to form microflames. Estimates were made of the size of the combustion zone of an individual particle and the gas-phase temperature near a particle (3150 ± 200 K). Some features of the combustion mechanism of fine aluminum particles in the dust flame are analyzed. The capabilities of spectral methods for studying the thermal and concentration structures of dust flames are demonstrated.
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References
P. F. Pokhil, A. F. Belyaev, Yu. V. Frolov, et al., Combustion of Metal Powders in Active Media [in Russian], Nauka, Mocsow (1972).
B. Brown and K. McArty, “Particle size of condensed oxides from combustion of metallized solid propellants,” in: 8th Symp. (Int.) on Combustion, Combustion Inst., Pittsburgh (1962), pp. 814–823.
A. N. Zolotko, N. I. Poletaev, J. I. Vovchuk, et al., “Nanoparticles formation by combustion techniques,” in: C. G. Granqvist, L. B. Kish, and W. H. Marlow (eds.), Gas Phase Nanoparticle Synthesis, Kluwer Academic, Dordrecht (2004), pp. 123–156.
A. N. Zolotko, Ya. I. Vovchuk, N. I. Poletaev, A. V. Florko, and I. S. Altman, “Synthesis of nanooxides in two-phase laminar flames,” Combust., Expl., Shock Waves, 32, No. 3, 262–269 (1996).
V. I. Malinin, E. I. Kolomin, and I. S. Antipin, “Ignition and combustion of aluminum-air suspensions in a reactor for high-temperature synthesis of alumina powder,” Combust., Expl., Shock Waves, 38, No. 5, 525–534 (2002).
M. N. Laritchev, I. O. Leipunsky, P. A. Pshechenkov, et al., “Study of oxidation of ultra fine aluminum particles in air, O2 and CO2. The possibility of low temperature burning of aluminum nanoparticles,” in: Proc. of Int. Conf. on Combustion and Detonation, Zel’dovich Memorial II, Moscow, Russia, August 30–September 3 (2004), CD ROM, No. WS1-9.
M. W. Beckstead, “Correlating aluminum burning times,” Combust., Expl., Shock Waves, 41, No. 5, 533–546 (2005).
V. M. Gremyachkin, A. G. Istratov, and O. I. Leipunskii, “Model for the combustion of metal droplets,” Combust., Expl., Shock Waves, 31, No. 3, 313–318 (1975).
R. Friedman and A. Macek, “Ignition and combustion of aluminum particles in hot ambient gases,” Combust. Flame, 6, No. 1, 9–19 (1962).
P. Bucher, R. A. Yetter, T. Yetter, et al., “Flame structure measurement of single isolated aluminum particles burning in air,” in: 26th Symp. (Int). on Combustion, Vol. 2, Combustion Inst., Pittsburgh, PA (1996), pp. 1899–1909.
E. L. Dreizin, “On the mechanism of asymmetric aluminum particle combustion,” Combust. Flame, 117, No. 4, 841–850 (1999).
N. I. Poletaev and A. V. Florko, “Radiative characteristics of an aluminum dust flame. Condensed phase,” Combust., Expl., Shock Waves, 43, No. 4, 414–422 (2007).
N. I. Poletayev, A. N. Zolotko, A. V. Florko, et al., “Combustion synthesis and investigation of metal oxide nanopowders properties,” in: Chemical Engineering — A Key Technology Serving Mankind, Proc. of 3rd European Congress of Chemical Engineering, Nurenberg, June 26–28 (2001).
A. V. Florko, S. V. Kozitskii, A. N. Pisarenko, and A. M. Matsko, “Study of combustion of single magnesium particles at low pressure,” Combust., Expl., Shock Waves, 22, No. 2, 159–163 (1986).
L. A. Kuznetsova, N. E. Kuz’menko, and Yu. A. Plastinin, Probabilities of Optical Transitions of Diatomic Molecules [in Russian], Nauka, Moscow (1980).
A. A. Radtsig and B. N. Smirnov, Handbook on Atomic and Molecular Physics [in Russian], Atomizdat, Moscow (1980).
B. G. Trusov, Astra. Modeling Chemical and Phase Equilibria at High Temperatures [in Russian], Moscow (1989).
V. M. Gremychkin, A. G. Istratov, V. I. Kolesnikov-Svinarev, and O. I. Leipunskii, “Buildup of alumina on a burning aluminum particle,” Fiz. Goreniya Vzryva, 16, No. 1, 155–156 (1980).
S. Yuasa, Y. Zhu, and S. Sogo, “Ignition and combustion of aluminum in oxygen/nitrogen mixture stream,” Combust. Flame, 108, No. 4, 387–396 (1997).
A. N. Zaidel, G. V. Ostrovskaya, and Yu. I. Ostrovskii, Technique and Practice of Spectroscopy [in Russian], Nauka, Moscow (1976).
S. É. Frish, Spectroscopy of Gas-Discharge Plasma [in Russian], Nauka (1970).
N. D. Ageev, S. V. Goroshin, A. N. Zolotko, et al., “Velocity of steady-state flames in gas-aluminum suspensions,” in: Combustion of Heterogeneous and Gas Systems, Proc. IX Symp. on Combustion and Explosion, Chernogoglovka (1989), pp. 83–85.
L. A. Klyachko and S. V. Goroshin, “Ignition and combustion of gas-particle suspensions,” Inzh.-Fiz. Zh., 54, No. 2, 330–341 (1988).
NIST Standard Reference Database, No. 69, June 2005 Release, NIST Chemistry WebBook. http://webbook.nist.gov/chemistry/.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 4, pp. 72–79, July–August, 2008.
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Poletaev, N.I., Florko, A.V. Spectral studies of the gas component of an aluminum dust flame. Combust Explos Shock Waves 44, 437–443 (2008). https://doi.org/10.1007/s10573-008-0070-5
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DOI: https://doi.org/10.1007/s10573-008-0070-5