INFLUENCE OF ALUMINUM ADMIXTURES ON THE COMBUSTION REGIME OF NANOSTRUCTURED SILICON WITH A SOLID-PHASE OXIDANT

Consideration has been given to the infl uence of additives of aluminum nanoparticles to mixtures of nanostructured silicon with a solid-phase oxidant on the characteristics of their high-velocity (detonation) combustion. The thermodynamic characteristics of combustion of the systems "aluminum–silicon–oxygen" and "aluminum– silicon–ammonium perchlorate," and also the Chapman–Jouguet velocity and the thermodynamic characteristics of solid-phase mixtures of nanostructured silicon with ammonium perchlorate and aluminum nanoparticles with a varying content of aluminum oxide have been calculated in a wide range of compositions. It has been established that for mole fractions of aluminum of less than 0.33 in the solid-fuel mixture, the system has high-velocitycombustion characteristics inherent in silicon-enriched mixtures. It has been shown that detonation combustion of aluminum–silicon–sodium perchlorate mixtures in this region of concentrations of aluminum occurs with a signifi cant velocity defect (of 40–50%) with respect to the Chapman–Jouguet detonation velocity
   
Author:  P. N. Krivosheyev, V. N. Mironov, O. G. Penyazkov, and S. I. Futko
Keywords:  detonation combustion, nanostructured silicon, solid-phase oxidant, gas suspension of particles, aluminum nanoparticles, ammonium and sodium perchlorates, composite fuel, Chapman–Jouguet detonation, mathematical modeling
Page:  1375