Abstract The mechanism of stabilization of the combustion in the duct of the solid fuel grain of a solid fuel ramjet with a flame holder was analyzed for the first time. The flame holder can be either a shoulder in the inlet part of the duct, or an autonomous gas generator running on solid fuel capable of self-sustained combustion. A mathematical model for evaluating the stability of the combustion in the solid fuel ramjet grain duct was developed. It was shown that there are several parameters characterizing the solid fuel grain and the solid fuel ramjet as a whole that affect the stability of the operation of the solid fuel ramjet. The main control parameters are the temperature of the combustion products in the flame holder and the flow rate of the combustion products from the flame holder (which can be controlled by varying the sizes and shape of the flame holder), and also the degree of turbulence of the air flow in the solid fuel grain duct. The stability of the combustion in the duct of the solid fuel grain of the solid fuel ramjet was studied, and the possible modes of the operation of the solid fuel ramjet while varying the control parameters were determined.

中文翻译：

---

固体燃料冲压发动机固体燃料颗粒管道内燃烧的稳定机理

摘要 首次分析了带火焰稳定器的固体燃料冲压发动机固体燃料颗粒管内燃烧的稳定机理。火焰稳定器可以是管道入口部分的肩部，也可以是依靠能够自我维持燃烧的固体燃料运行的自主气体发生器。建立了用于评估固体燃料冲压发动机谷物管道燃烧稳定性的数学模型。结果表明，有几个表征固体燃料颗粒和固体燃料冲压发动机作为一个整体的参数会影响固体燃料冲压发动机运行的稳定性。主要控制参数是火焰稳定器中燃烧产物的温度和火焰稳定器中燃烧产物的流量（可通过改变火焰稳定器的尺寸和形状来控制），以及湍流程度固体燃料颗粒管道中的气流。研究了固体燃料冲压发动机固体燃料颗粒通道内燃烧的稳定性，确定了改变控制参数时固体燃料冲压发动机可能的运行模式。