EXPERIMENTS ON THE COMBUSTION CHARACTERISTICS OF DETERRENT-COATED PROPELLANTS AND THEIR APPLICATION IN TRAVELING CHARGE PROPULSION

摘要

The combustion characteristics of deterrent-coated propellants and their application in a 105 mm caliber gun are investigated experimentally. The mixture of deterrent-coated and conventional single base propellant particles are fired in a 100 ml closed bomb with loading densities of 0.1 glcm~3 and 0.2glcm~3, respectively. The measured pressure time profiles indicate that the deterrent can retard the combustion of coated propellants, and the delays are related to the pressure and the thickness of the deterrent. The optimized deterrent-coated propellants are attached to the tailfin of a 105 mm caliber armor piercing projectile (APP) as traveling charge, and fired in a 105 mm caliber gun. The firing results indicate that the traveling charge of deterrent-coated propellants can improve the muzzle velocity of projectiles by 2.8% and 4.2% under maximum pressure of 330Mpa and 400 Mpa, respectively. The pressure time curves measured in the chamber indicate that pressure plateau effects can be expected by the combustion delay of deterrent-coated propellants.