Component Propellant Combustion Residues To The Formation Of The Impact Studies

The combustion residue of propellant will affect the firing precision and the launching security of barrel weapons; reduce the viability of warrior as well as the weapons. This paper analyzes the generation mechanism of the combustion residues during the barrel weapon launching process in detail, and explains that the propellant combustion residue is one of the major source of propelling charge combustion residues. Analyze the generation reason of the propellant combustion residue based on the five areas theory of steady combustion, analyzed results show that the residues mainly generate from the solid phase preheating area and pool area and mixed-phase region product, here, the pressure and temperature of the combustion be the main factors that affect the amount of residue. In order to research the technical means of reducing the propellant combustion residue, this paper makes full use of atmospheric pressure combustion, and smog analyze as well as the TG-MS experiments to characterize the residues, study the effect that the quantum of nitrogen within normal nitrocellulose and the additive act on the amount of propellant combustion residues. Results show that the performance of nitrocellulose will affect the amount of single-base propellant combustion residue. The higher quantum of nitrogen included within nitrocellulose, the fewer smog and solid residues that produced by single-base propellant, on the contrary, the amount of smog and solid residues increase while the quantum of nitrogen within nitrocellulose be reduced. When add salt additives in propellant, it is generally believed that the smog will increase, but the result shows that when add about 1% of PbCO3 in propellant, due to the catalysis of PbCO3 towards propellant combustion, the decomposition temperature of combustion at atmospheric pressure be reduced so that the combustion tends to fully reaction, thus, the combustion residue greatly reduced, offsetting the effect of increasing residue by adding substances, But for SnO2 additives, the effect is just the opposite, the combustion residue amount increased when added. Therefore, choosing high nitrogen nitrocellulose and adding reasonable amount of PbCO3 which can reduce combustion activation energy of single-base propellant is helpful in reducing the combustion residue of single-base propellant.