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The influence of particle diameter on the specificity of fine powders in the extinction of flames

✍ Scribed by P. Laffitte; R. Delbourgo; J. Combourieu; J.C. Dumont

Publisher
Elsevier Science
Year
1965
Tongue
English
Weight
635 KB
Volume
9
Category
Article
ISSN
0010-2180

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✦ Synopsis

A systematic investigation o/ the extinction of flames by fine powders propagating in a tube, carried out on various propagation rdgimes ranging from uniform flames to detonations, has shown that each flame is best inhibited by a substance of optimum particle diameter, variable with the flame parameters. Additional chemical specificity can result only after the convenient particle diameter is correctly chosen. This second stage of the inhibition process can sometimes drastically reduce the amount of substance necessary to produce extinction. In the cases where a chemical specificity is noted, alkaline salts appear to be more efficient when decomposition, fusion or volatilization is likely to occur at low temperature.

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