Effect of the Combined Burning-Surface/Particle Motion on Aluminum Agglomeration

摘要

ALUMINUM powders (typically of 5–20 u0002m radius) are addednto solid propellants to obtain higher burning rates and increasenthe energetic performance. In these propellants, assuming idealnburning implies that all particles stay immobile in the propellantnvolume before meeting the regressing burning surface (BS) and theynare ejected (lifted) from the burning surface into the combustionnchamber without interacting with the burning surface. However, thenmotion of the 2-D moving burning surface and its interaction with thenmobile particles can lead to diffusion motion of the particles. Thenburning surface moves together with the aluminum particles, and thisnprocess results in particle accumulation and agglomeration on or nearnthe propellant burning surface [1–9], as shown in Fig. 1.