Combustion of aerosolized spherical aluminum powders and flakes in air

Document Type

Article

Publication Date

7-1-2004

Abstract

Combustion rates and completeness of aerosolized spherical aluminum powders and flakes are compared using constant volume explosion experiments. The comparison of particles and flake sizes was made based on their specific surface areas determined using the Brunauer-Emmett-Teller (BET) method and respective "BET diameters." It is observed that the rates of pressure rise and respective rates of flame propagation were higher for spherical aluminum powders with BET diameters of about 2 to 5 μm compared to aluminum flakes for which the respective BET diameters were under 1 μm. In agreement with the flame propagation rates, the overall completeness of combustion was also higher for spherical powders compared to flakes. It is suggested that aerosolized flakes could be agglomerated in gas flows more than spherical particles causing their inferior combustion performance.

Identifier

2542448232 (Scopus)

Publication Title

Combustion Science and Technology

External Full Text Location

https://doi.org/10.1080/00102200490426433

ISSN

00102202

First Page

1055

Last Page

1069

Issue

7

Volume

176

Grant

DTRA01-02-C-0064

Fund Ref

Defense Threat Reduction Agency

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