Investigation of particle size effect on flame velocity in the combustion of nano/micron-sized aluminum particles in air

Abstract

It is observed that a diffusion-controlled mechanism applied to the burning of micron-sized particles is not applicable to the combustion of nano-sized particles burning under kinetically controlled conditions. Furthermore, when heat transfer occurs between micron-sized particles and air, Nusselt number can be assumed to be constant and equal to 2, while this number is a function of Knudsen number when heat transfer occurs between nano-sized particles and air. Ignition temperatures of micron- and nano-sized particles are also different. In this article, mass and energy conservation equations for both particle and gas phases are solved. By doing so, flame velocity is obtained. Afterwards, with respect to different combustion characteristics of micron-and nano-sized particles such as ignition temperature, burning time, and Nusselt number, the effect of particle size on the flame velocity of aluminum particles combustion in air is studied and compared with experimental and numerical results. At the equivalence ratio of 0.85, it is shown that flame velocity is proportional to d^−0.94 and d⁻^0.56 for micron- and nano-sized aluminum particles, respectively.

Keywords

Combustion flame velocity micron-sized particles nano-sized particles aluminum

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References

Puri P. Multi scale modeling of ignition and combustion of micro and nano aluminum particles. PhD Thesis, The Pennsylvania State University, 2008.

Il'in

Popenko

Gromov

. Combustion of agglomerated ultrafine aluminum powders in air. Combust Explo Shock Waves 2002; 38(6): 665–669.

Meda

Marra

Galfetti

. Nano-composites for rocket solid propellants. Compos Sci Technol 2005; 65(5): 769–773.

Risha

Huang

Yetter

. Experimental investigation of aluminum particle dust cloud combustion, 2005. 43rd AIAA aerospace sciences meeting and exhibit, Reno, Nevada.

Jadidi

Bidabadi

Hosseini

. Predictions of laminar flame in aluminum dust clouds with a two-dimensional analytical model. Proc IMechE, Part G: J Aerospace Engineering 2009; 223(7): 915–925.

Jadidi

Bidabadi

Shahrbabaki

A Sh

. Quenching distance and laminar flame speed in a binary suspension of solid fuel particles. Lat Am Appl. Res 2010; 40(1): 39–45.

Huang

Risha

Yang

. Effect of particle size on combustion of aluminum particle dust in air. Combust Flame 2009; 156(1): 5–13.

Bocanegra

Davidenko

Sarou-Kanian

. Experimental and numerical studies on the burning of aluminum micro and nanoparticle clouds in air. Exp Therm Fluid Sci 2010; 34(3): 299–307.

Goroshin

Bidabaid

Lee

JHS

. Quenching distance of laminar flame in aluminum dust clouds. Combust Flame 1996; 105(1–2): 147–160.

10.

Trunov

Schoenitz

Zhu

. Effect of polymorphic phase transformations in Al₂O₃ film on oxidation kinetics of aluminum powders. Combust Flame 2005; 140(4): 310–318.

11.

Bulian

Kerr

Puszynski

. Ignition studies of aluminum and metal oxide nanopowders. Proceedings of the 31st international pyrotechnics seminar, 12–14 July 2004, Fort Collins, CO327–338.

12.

Parr

Johnson

Hanson-Parr

. Evaluation of advanced fuels for underwater propulsion. 39th JANNAF combustion subcommittee meeting, Colorado Springs, Colorado, USA, December 2003.

13.

Alekseev

Barlas

Tsidelko

Effect of Particle size on the combustibility and explosion parameters of dispersed aluminum and magnesium powders. In: VV

Nedin

(ed). Preduprezhdenie vnezapnykh vzryvov gazodispersnykh sistem, Kiev: Naukova Dumka, 1971, pp. 66–73. (in Russian).

14.

Fedoseev

. Combustion of magnesium and aluminum particles in different media. Fizika Aerodispersnykh Sistem 1970; 3: 61–72. in Russian).

15.

Liu

Daun

Snelling

. Heat conduction from a spherical nano-particle: status of modeling heat conduction in laser-induced incandescence. Appl Phys B 2006; 83(3): 355–382.

16.

McCoy

Cha

. Transport phenomena in the rarefied gas transition regime. Chem Eng Sci 1974; 29(2): 381–388.

17.

Beckstead

. Correlating aluminum burning times. Combust Explo Shock Waves 2005; 41(5): 533–546.

18.

Bidabadi

Hosseini

Fereidooni

. Modeling burning time of aluminum nanoparticle based on the ignition temperature, 2012. 4th fuel and combustion conference of Iran, Tehran, Iran(in Persian).

19.

Bouteloup P. Specific Heat of Air vs. Temperature and Thermal Conductivity of Air vs. Temperature, http://bouteloup.pierre.free.fr/lica/phythe/don/air/ (2010, accessed 23 November 2012)..

20.

Boichuk

Shevchuk

Shvets

. Flame propagation in two-component aluminum–boron gas suspensions. Combust Explo Shock Waves 2002; 38(6): 651–654.

21.

Goroshin

Fomenko

Lee

JHS

. Burning velocities in fuel-rich aluminum dust clouds. Symposium (International) on Combustion 1996; 26(2): 1961–1967.

22.

Ballal

. Flame propagation through dust clouds of carbon, coal, aluminium and magnesium in an environment of zero gravity. Proc R Soc Lond A 1983; 385(1788): 21–51.

23.

Cassel

. Some fundamental aspects of dust flames . Reports of Investigations 6551, US Bureau of Mines, 1964.