Distribution of Aluminum Clusters and their Ignition in Air during Dispersion of Aluminum Nanoparticles in a Shock Wave
P. S. Kuleshov1,2, V. D. Kobtsev1,3
1Baranov Central Institute of Aviation Engineering, Moscow, 111116 Russia
2Moscow Institute of Physics and Technology, Dolgoprudny, 141701 Russia
3Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991 Russia
Keywords: наночастица, кластер, ударная волна, диспергирование, дисперсия, воспламенение, nanoparticle, cluster, shock wave, dispersion, dispersion, ignition
Abstract
The dispersion of oxidized Al nanoparticles into clusters by rapid heating in a shock wave has been studied. Clusters distribution characteristics were calculated as a function of the parameters of the initial nanoparticle distributions and the nature of the interaction of deformation waves with the nanoparticle shell and core. The studies were carried out using the author's proposed resonant mechanism for dispersion of the liquid core of a nanoparticle by a shock pulse upon destruction of the solid oxide shell. The ignition of Al nanoparticles after dispersion in air was analyzed using the previously described kinetic oxidation mechanism with the evaporation of clusters taken into account. Initial distributions of nanoparticles and their ignition times are validated against published experimental data.
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