Combined with a common fuel binder, solid hypergols can simplify the overall complexity of hybrid rocket engines, as the fuel grain can be ignited and reignited without any external power source or external fluid. Also, with the hypergolic additive embedded in the binder, the flame zone could be placed at the surface of the grain itself, thereby providing heat to the grain to maximize regression rate and promote combustion sustainability. The objective of this study was to demonstrate hypergolic ignition and successive relights of a 2-in motor grain configuration, with a paraffin-based fuel and MON-3 (3 wt % nitric oxide in nitrogen tetroxide) as the oxidizer. With sodium amide and potassium bis(trimethylsilyl)amide as solid hypergolic additives, the study focused on the influence of the additive type, loading, location, and format on the grain ignition delay and combustion sustainability. Hypergolic ignition was achieved with grain configurations composed of a front segment with 90 wt % additive and the main grain with loadings of additive from 40 down to 0 wt %. Two-s single burn tests provided regression rate estimates for the different grain combinations. Grain ignition delays varied between $\sim 20$ and $\sim 250\mathrm{ms}$, depending on the grain configuration, with $C^{*}$ efficiencies between 64% and 98%.

结合常见的燃料粘合剂，固体hypergol 可以简化混合火箭发动机的整体复杂性，因为燃料颗粒可以在没有任何外部动力源或外部流体的情况下被点燃和重新点燃。此外，通过嵌入粘合剂中的自燃添加剂，火焰区可以放置在谷物本身的表面，从而为谷物提供热量，以最大限度地提高回归率并促进燃烧的可持续性。本研究的目的是展示 2 英寸发动机谷物配置的自燃点火和连续重新点火，使用石蜡基燃料和 MON-3（三氧化二氮中的 3 重量％一氧化氮）作为氧化剂。以氨基钠和双（三甲基甲硅烷基）氨基钾作为固体自燃添加剂，研究重点是添加剂类型、负载量、位置、和格式对粮食点火延迟和燃烧可持续性的影响。自燃点火是通过颗粒配置实现的，颗粒配置由具有 90 wt% 添加剂的前段和具有 40 至 0 wt% 添加剂负载的主颗粒组成。两秒单次燃烧测试提供了不同谷物组合的回归率估计。谷物点火延迟在$～20$ 和 $～250\mathrm{多发性硬化症}$，取决于颗粒配置，与 $C^{*}$ 效率在 64% 到 98% 之间。