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Combustion of Propellants with Ammonium Dinitramide

机译：推进剂与二乙酰胺铵的燃烧

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This paper reports a series of experiments involving ammonium dinitramide (ADN),a new energetic oxidizer of potential use in composite solid propellants.The experiments include (a) self-deflagration of pressed pellets of ADN;(b) combustion of sandwiches with ADN laminae on both sides of a binder lamina that is either "pure" or filled with paniculate oxidizer and other additives;and,(c) combustion of propellants with a bimodal oxidizer size distribution,wherein,combustion of coarse ADN and fine AP (ammonium perchlorate) and vice versa were used,in addition to mixtures of coarse ADN and AP,fine ADN and AP,and all-ADN or all-AP formulations.The results indicate the possibility of a major role for condensed phase heat release in the control of the self-deflagration of ADN,resulting in very high rates compared to that of AP self-deflagration.The sandwich burning rates are always appreciably above the ADN self-deflagration rate,but follow the same trend as pressure is varied.This indicates a role for the oxidizer/fuel (O/F) flame present in the sandwiches,which seems to assist the self-deflagration of the ADN laminae.Results with oxidizer filled-sandwiches show that O/F flame-assisted self-deflagration of ADN lamina always controls the sandwich burning rate regardless of the contents of the binder lamina (ADN or AP particles,with or without very fine ferric oxide catalyst or aluminum).The all-AP formulations exhibited plateau burning and addition of Fe_2O_3 yielded burning rates as high as pure ADN laminae.A family of bimodal propellants reflect the sandwich results by showing higher rates for formulations with coarse ADN and any fine oxidizer (ADN or AP) than those with coarse AP and fine ADN or AP.Pressure sensitivity of the burning rates was high!
机译：本文报道了一系列涉及二硝酰胺（ADN）的实验，这是一种可能在复合固体推进剂中使用的新型高能氧化剂。实验包括（a）ADN压制颗粒的自燃;（b）带有ADN薄片的三明治燃烧在纯净的或填充有颗粒状氧化剂和其他添加剂的粘合剂层的两侧;以及（c）燃烧具有双峰氧化剂尺寸分布的推进剂，其中粗ADN和细AP（高氯酸铵）燃烧反之亦然，除了粗ADN和AP的混合物，细ADN和AP的混合物以及全ADN或全AP配方外，结果也表明凝结相放热在控制热风中起主要作用。 ADN的自爆率比AP的自爆率高。三明治燃烧率始终明显高于ADN的自爆率，但随着压力的变化也遵循相同的趋势。三明治中存在的氧化剂/燃料（O / F）火焰的作用，似乎有助于ADN薄片的自燃。氧化剂填充三明治的结果表明，O / F火焰辅助的ADN薄片自燃无论粘合剂层的含量如何（ADN或AP颗粒，有或没有非常细的三氧化二铁催化剂或铝），总能控制三明治的燃烧速率。全AP配方表现出平稳燃烧，添加Fe_2O_3的燃烧速率高达纯ADN薄层。双峰推进剂系列通过显示具有粗ADN和任何精细氧化剂（ADN或AP）的配方比具有粗AP和具有优良ADN或AP的配方更高的速率来反映三明治结果。 ！

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