Investigation on Aluminum Particles Combustion in the Flame of Solid Rocket Propellants
R. Akiba, М. Kohno, A. Volpi, S. Tokudome, Т. Shibata
Страницы: 115-119
Аннотация
Aluminum is widely used in modern solid rocket propellants for many purposes, but mainly to increase the specific impulse by raising the flame temperature. Most of the aluminum, present in powder state in the propellant, do not vaporize onto the burning surface so tending later to agglomerate into large particles difficult to burn even in the flame. The aim of this work is to study the behavior of the aluminum particles onto the burning surface and into the gaseous region of the propellant flame structure. Different diagnostic techniques have been used: SEM on the burning surface of extinguished samples, pictures taken during combustion by filtered still camera and a new developed laser diagnostic. By the use of an UV laser beam and a high speed shutter TV camera, the Al particles onto the burning surface has been visualized. A suitable Image Processor to extract information from the frames has been adopted. Tests on a HTPB.12/AP.68/A1.20 propellant in the pressure range 10–50 atm has been performed. Results show the reliability of the diagnostics here used and have contributed to a better characterization of the tested propellant.
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