Agglomeration characteristics of aluminum particles with changing pressure in AP/AN composite propellants

For aluminized AP/AN composite propellant, the relation between the agglomerate diameter and pressure was investigated by observing aluminum particle agglomeration in the reaction zone near the burning surface with changing pressure. When the burning rate increased with increasing pressure in aluminized AP/AN composite propellant, the agglomerate diameter decreased with increasing burning rate. We assumed the agglomerate range as the area of the distributed aluminum particles before agglomeration around the burning surface. When the pressure increased, the burning rate increased. Then the agglomerate range decreased. The agglomerate range changes with the burning rate and varies with the temperature profile in the reaction zone. The agglomerate diameter depends on the burning rate and the agglomerate range with changing pressure.