Study on the Burning of the Modified Single Base Gun Propellant

The modified single base gun propellant (MSBP) was prepared from single base propellant grain by impregnation with blasting oil, followed by deterring with deterrent in water medium. The combustion performance of this propellant was investigated by means of closed-bomb, interior ballistic and barrel erosion test. The interior ballistic property of this propellant after accelerated aging at high temperature was researched, too. Compared with the single base gun propellant, the MSBP burns more progressively and the value of Pr increases from 0.035 to 0.445. The interior ballistic performance for this propellant charge is improved obviously. The muzzle velocity increases by 5.0% from 886.6 m/s to 931.3 m/s. The MSBP has the characteristic of low temperature sensitivity and the barrel erosion of this propellant decreases by 16.6% at least. The interior ballistic performance of the MSBP has slightly changes after long-term storage. The MSBP has the advantages of higher muzzle velocity, higher combustion progressivity, low temperature sensitivity, low erosion and it can be satisfied with the actual storage demand.