Review of aluminum agglomeration during the combustion of solid propellants

The research progress on the agglomeration of aluminum and condensed combustion products during the combustion of solid propellants is reviewed. The limitations of present studies are discussed, followed by the analysis of valuable research directions in future. It is proposed to develop thorough investigations in future on the aspects including agglomeration kinetics of aluminum at the burning surface under high pressure, systematic experiments of the effect of propellant formulations on agglomeration, modeling agglomeration, and methods of agglomeration reduction. Using unconventional aluminum powder or surface coating to reduce agglomeration should deserve more attention.