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通过配方调节与工艺控制得到3种不同结构的泡沫发射药,讨论了泡孔结构形成的影响因素;采用密闭爆发器实验和恒压燃速测试实验研究了不同结构泡沫发射药的燃烧性能。结果表明,控制气体生成速率、添加RDX颗粒、调节NC含氮量和发泡时间能够有效控制泡沫发射药的泡孔结构;皮芯结构泡沫发射药具有渐增燃烧特性,发泡区的动态活度可达不发泡皮层的2.4倍以上;独立泡孔结构的泡沫发射药在100MPa下燃速可达未发泡样品的30倍;非独立孔隙结构的泡沫发射药不同方向上的燃速差异显著,密度为1.37g/cm~3的样品100MPa下轴向燃速最高可达3.860m/s。
Three different configurations of foam propellants were obtained through formulation adjustment and process control. Influencing factors on the formation of cell structure were discussed. The combustion performance of different structural foam propellants was studied by using closed-cell burst test and constant pressure burning rate test. The results showed that the control of the gas generation rate, the addition of RDX particles, the adjustment of the nitrogen content and the foaming time of NC can effectively control the cell structure of the foam propellant. The skin core foam projectile has the characteristics of increasing combustion, Degree up to 2.4 times higher than the non-foam cortex; the independent foam structure of the foam propellant at 100MPa burning rate of up to 30 times the unfoamed samples; non-independent pore structure of the foam launchers in different directions the burning rate difference Significant, the density of 1.37g / cm ~ 3 sample 100MPa axial burning rate up to 3.860m / s.