RDX粒度对某高能硝胺发射药燃烧性能的影响

为了研究黑索金(RDX)粒度对某高能硝胺发射药(NP)常、高、低温燃烧性能的影响,在NP发射药配方的基础上,加入超细RDX和普通RDX,其平均粒径(D50)分别为6μm和40μm,制备得到新型高能硝胺发射药NPH.通过密闭爆发器试验,对比分析NP和NPH发射药在常、高、低温条件下燃烧性能的变化规律.高能硝铵发射药中,R...

RDX Particle Size on Combustion Performance of a High-Energy Nitramine Propellant

To study the effect of RDX particle size on the normal, high and low temperature combustion performance of a high energy propellant (NP), a new high-energy nitramine propellant NPH was prepared by adding ultrafine RDX and ordinary RDX, with average particle size (D50) of 6 um and 40 um respectively on the basis of NP propellant formulation. The combustion properties of NP propellant and NPH propellant under normal, high and low temperature conditions were compared and analyzed through a closed bomb test. The results show that when the content of RDX in high-energy nitramine propellant is 10%, both particle size of RDX can reduce the initial gas generation intensity of NP propellant, but ultrafine RDX can effectively reduce the erosive combustion effect of NP propellant. Ordinary RDX reduces the intensity of gas generation and the gradual increase of combustion in the stable combustion section of NP propellant, which leads to the deterioration of propellant combustion performance. Ultrafine RDX reduces the intensity of high temperature gas generation in stable combustion section while increasing it at low temperature, which is beneficial to reduce the temperature coefficient of the propellant charge. Both particle sizes of RDX improve the structural stability of NP propellant and delays the splitting of propellant particles. The combustion split point of NPH propellant is higher than that of NP propellant from 0.77 to 0.83. The influence of temperature change on the combustion decomposition point of propellant is negligible. The research can provide a reference for the formulation design and optimization of high-energy nitramine propellant containing RDX.