Experiment of Combustion Completeness and Mechanical Intensity of Combustible Seals in Gun Propellant Charge

In order to reduce the combustion leaving of certain fixed cartridge gun propellant, the combustion completeness and the mechanical strength of combustible seals were studied. The compression tests of combustible seals and the conventional papery seals were carried out. The mechanical intensity of gun propellant charge with combustible seals was tested by ammunition ramming in gun weapon system and transportation on field road. The burning rates of combustible seals were tested by closed-vessel test. And the mechanical intensity and the combustion completeness of gun propellant charge with combustible seals were validated by interior ballistic test. The results show that the compression stresses of combustible underprop is two times as conventional paper underprop. The compression stress of combustible cover is about 40% as conventional paper cover. And it is about 80% as conventional paper underprop. The combustible seals can meet the demand of mechanical intensity for gun propellant charge in ramming and transportation. Under 50MPa ~150MPa, the burning rate of combustible seals is faster than 8 times as ADiGu gun propellant. The combustible seals can be burnt before gun propellant under the same burning environment in bore. And there is no combustion leaving in front of muzzle after firing.