Accession Number : AD0485182

Title :   FUNDAMENTALS OF COMBUSTION OF SINGLE ALUMINUM AND BERYLLIUM PARTICLES.

Descriptive Note : Technical rept.,

Corporate Author : VIRGINIA UNIV CHARLOTTESVILLE

Personal Author(s) : Macek,Andrej

Report Date : JUN 1966

Pagination or Media Count : 30

Abstract : The purpose of this paper is a comparative examination of ignition and combustion characteristics of small (< 100-microns diameter) single aluminum and beryllium particles burning in gaseous environment of known composition and temperature. The compsrative discussion covers both new and previously published information. It is concluded that the processes leading to ignition of both metals are strongly affected by physical properties of the respective stable oxides. The results of self-sustained combustion studies, including quantitative burning rate data, indicate that both metals probably burn by the vapor-phase mechanism, controlled by the diffusion of oxidant through the gas. Spherical combustion models are only approximately correct, because there is always a certain geometrical asymmetry during the burning stage, but the approximation can be quite good. The major cause of asymmetry is probably condensation of nascent oxide on the parent particle. (Author)

Descriptors :   (*COMBUSTION, *METALS), (*OXIDATION, METALS), PARTICLES, ALUMINUM, BERYLLIUM, IGNITION, BURNING RATE, OXIDES, STABILITY, PHYSICAL PROPERTIES, GASES, OXYGEN, PRESSURE

Subject Categories : Physical Chemistry
      Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE