Study on the Burning of Grain-molded Propellant

The investigation of the burning of grain-molded propellant comprises progressive burning, ignition and internal ballistic property. The grain-molded propellant is extruded by high energy nitramine propellant in the professional mould. The grain-molded propellant was studied by closed-bomb test, ignition simulation equipment test and 30 mm simulation gun test. The characteristics of p-t and L-B curves were analyzed for different density of grain-molded propellant. The influence law of density on the burning property of the grain-molded propellant was obtained. The results show that the bigger the density of the grain-molded propellant is, the better its progressivity is. And the progressivity of sample3 is the best, whose density is 1.25 g•cm-3. The muzzle velocity of sample3 increases 5.3% than that of high energy nitramine propellant.