Porous Incision Rod-shaped Propellant Combustion Performance Study

The propellant charge technology which has high loading density is a key direction in the area of propelling charge. The porous propellant has a better progressive combustibility, while its loading density is lower. The rod-shaped porous propellant has high loading density as well as good progressive combustibility, but its erosive burning is serious, which makes its application limited. This paper tries to deal with the problem of erosive burning by making some horizontal incision in the porous rod-like propellant. A special mold using for experiments was designed, and the rod-shaped porous propellant with different incision width and interval was made in this mold. The closed bomb test and the suspension of combustion were done for the further study of the erosion mechanism, and the combustion performance effect was studied by the factors of the length, incision width, spacing and other factors. The results show that: the porous propellant with incision whose width is 1mm, and the distance between the two immediate incision is 0.835cm, has a similar combustion performance with the porous propellant whose length is 0.835cm(L/do is 25.57, LID is 1.17)under this experiment conditions. If this propellant arranged orderly when it was charged, the loading density must be improved. So this study has some practical value in the application of long rod-shaped propellant.