The experiments show that DIANP propellent charge not only has good interior ballitic property, but also overcome the defect of porous propellant 125 charge, such as low energy, high hygroscopicity, unreasonable charge combustion character, and improve the high erosion and the serious muzzle flame existed in the present propellant charge containing high nitrog.

The semi-closed bomb control equations using study dynamic extrusion stress of propellant charge bed were established, and some experimental and numerical simulations were tested.

The pressure difference between the inner and the outer of gunpowder holes caused by the loading density variation of propellant charge makes the erosive burning occur at the inner holes during in-bore burning.

We brought forward our view concerning the developmental tendency and major research items on the propellants,propelling charges.

The propelling charge system uses highly progressive gun propellant compositions and geometries,a charge with low-temperature coefficient for pressure,and a pressure-compensating charge that increases pressure for the lower zones.

This paper focuses on the advance in study on launch safety for gun propellant charge.

Simulation of the compression and bursting of the charge bed in the chamber is one of the key problems in the study of launching safety of gun propellant charge.