Publicado 6 números por año
ISSN Imprimir: 2150-766X
ISSN En Línea: 2150-7678
Indexed in
COMBUSTION PHENOMENA OF BORON CONTAINING PROPELLANTS
SINOPSIS
The combustion of boron containing propellants, based on AP/GAP and AP/HMX/GAP formulations, have been investigated by applying fast spectroscopic, pyrometric and photographic techniques. The propellants burn at a rate of 17mm/s at 5 MPa. Addition of an iron oxide catalyst increased the rate to 20 mm/s at the same pressure. The determined average pressure exponents are 0.66 without and 0.57 with iron oxide as catalyst. At pressures higher than 5 MPa, a strong decrease in the exponent is observed. The reaction zones show high particle concentrations with temperatures from 1500 to 2000 K, varying with the nitrogen pressure. Reacting with air, the particle temperatures increase close to the evaporation temperature (2200 K) of boron oxide. The reaction of boron with oxygen is proved by the results of spectroscopic data. Considering an application in a ducted rocket, the boron is heated to the desired reaction temperature.