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

被引：6

作者：

Bidabadi, M. ^{[1
]}

Fereidooni, J. ^{[1
]}

Hosseini, S. N. ^{[1
]}

Asadollahzadeh, P. ^{[1
]}

机构：

[1] Iran Univ Sci & Technol, Sch Mech Engn, Combust Res Lab, Tehran 1684613114, Iran

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING | 2014年 / 228卷 / 02期

关键词：

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

D O I：

10.1177/0954410012471767

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

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.

引用

页码：297 / 304

页数：8

共 23 条

[1] Puri P., Multi Scale Modeling of Ignition and Combustion of Micro and Nano Aluminum Particles, (2008)
[2] Il'In A.P., Popenko E.M., Gromov A.A., Combustion of agglomerated ultrafine aluminum powders in air, Combust Explo Shock Waves, 38, 6, pp. 665-669, (2002)
[3] Meda L., Marra G., Galfetti L., Nano-composites for rocket solid propellants, Compos Sci Technol, 65, 5, pp. 769-773, (2005)
[4] Risha G.A., Huang Y., Yetter R.A., Experimental investigation of aluminum particle dust cloud combustion, 43rd AIAA Aerospace Sciences Meeting and Exhibit
[5] Jadidi M., Bidabadi M., Hosseini M.E., Predictions of laminar flame in aluminum dust clouds with a two-dimensional analytical model, Proc IMechE, Part G: J Aerospace Engineering, 223, 7, pp. 915-925, (2009)
[6] Jadidi M., Bidabadi M., Shahrbabaki A.S., Quenching distance and laminar flame speed in a binary suspension of solid fuel particles, Lat Am Appl. Res, 40, 1, pp. 39-45, (2010)
[7] Huang Y., Risha G.A., Yang V., Effect of particle size on combustion of aluminum particle dust in air, Combust Flame, 156, 1, pp. 5-13, (2009)
[8] Bocanegra P.E., Davidenko D., Sarou-Kanian V., Experimental and numerical studies on the burning of aluminum micro and nanoparticle clouds in air, Exp Therm Fluid Sci, 34, 3, pp. 299-307, (2010)
[9] Goroshin S., Bidabaid M., Lee J.H.S., Quenching distance of laminar flame in aluminum dust clouds, Combust Flame, 105, 12, pp. 147-160, (1996)
[10] Ma T., Schoenitz M., Zhu X., Effect of polymorphic phase transformations in Al2O3 film on oxidation kinetics of aluminum powders, Combust Flame, 140, 4, pp. 310-318, (2005)

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