ADN/GUDN 双氧化剂对NEPE 固体推进剂燃烧性能的影响（英）

设计并制备了含N?脒基脲二硝酰胺盐（GUDN）和二硝酰胺铵（ADN）的硝酸酯增塑聚醚（NEPE）固体推进剂样品，测试了推进剂的燃烧性能（燃速和压强指数）、燃烧火焰结构和燃烧波温度分布，并与不含GUDN和ADN的推进剂性能进行对比。结果表明，GUDN/ADN双氧化剂对NEPE推进剂的燃烧性能有明显的影响，推进剂配方中添加ADN可提高推进剂的燃速和压强指数，含15%、20%和22.5%的ADN替换高氯酸铵（AP）可使推进剂在7.0MPa下的燃速提高25.30%、36.76%和47.69%，GUDN使推进剂在7.0MPa下的燃速降低18.97%，而压强指数在1~15MPa提高12.04%，而且在不同压力下含双氧化剂的NEPE推进剂的燃烧火焰结构呈多火焰结构，而且火焰的亮度随着压强的增大而变亮。

Effect of ADN/GUDN Dual Oxidizers on the Combustion Features of Nitrate Ester Plasticized Polyether Solid Propellants

Several laboratory scale research on nitrate ester plasticized polyether (NEPE) solid propellants with and without ammonium dinitramide (ADN) and N-guanylurea-dinitramide (GUDN), featured with the same nominal composition, have been prepared and evaluated. The combustion properties (strand burn rate and flame photos) and thermogravimetry (TG) analysis of propellants with ADN and GUDN have been determined. These parameters are compared to those of reference blank compositions. It turns out that the ADN/GUDN dual oxidizer may greatly affect the combustion behavior of NEPE propellants. The addition of ADN particles to the propellant formulations can increase the burn rate and pressure exponent (n), when a fracture of AP or GUDN was replaced by ADN, the n increases from 0.52 to 0.67 and from 0.58 to 0.67, respectively. By replacing AP flakes with the same fraction of GUDN, the burning rate decrease by 18.97% at 7.0 MPa and n increased by 12.04% (1-15 MPa), in comparison to the reference propellant. The involved NEPE propellants with and without ADN/GUDN dual oxidizers at various pressure ranges show multi-flame structure, and the brightness of flame increases with the pressure increases. Addition of ADN can decrease the thermal decomposition temperature. Moreover, when part of AP was replaced by GUDN, the thermal decomposition procedure is close to that of the reference sample.