High‐speed self‐spin is one of extreme working conditions that alters ignition internal ballistic performance and can induce ignition abnormalities. To demonstrate the studies on mechanism of interior ballistics as the results of acceleration loads imposed on spinning SRM, the modes of swirl dynamical flow and acceleration‐induced combustion phenomena for igniter and propellant are developed and first taken into account in a new ignition model by user‐defined sources (UDS). To verify the model, the heat transfer, added‐mass and build‐up pressure modes of this ignition model are verified by comparison with static ignition experimental data, second, the swirl flow field mode is validated through comparison between models and by analogy with experimental phenomena, then the numerical model is proved by grid‐independent verification. Dimensionless analysis eliminates diversity in time scales at different periods. The influences of swirl flow, igniter, and propulsion acceleration‐induced combustion on various stages of ignition are studied. It was found that: (1) Time scale in the ignition process of spinning SRM is mainly affected by the igniter‘s sensitivity to rotational acceleration (A_ig ), whose change is approximately described as an empirical equation based on rotational overload (α ) and ignition sensitivity coefficient limit A _ig,max ; (2) The acceleration effect on propellant combustion is mainly manifested in the pressure peak and the pressure rate, however, it has little effect on the ignition delay; (3) Swirl flow factors are not the main factors affecting the ignition process for small SRMs with small‐contraction nozzles.

中文翻译：

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高速自旋对固体火箭发动机点火瞬变的影响机理：数值模拟

高速自旋是改变点火内部弹道性能并可能引起点火异常的极端工作条件之一。为了证明对作为旋转SRM的加速载荷结果的内部弹道机理的研究，点火器和推进剂的旋流动力流和加速燃烧现象的模式得以开发，并在用户新的点火模型中首次考虑预定义源（UDS）。为了验证模型，通过与静态点火实验数据进行比较，验证了该点火模型的传热，附加质量和积聚压力模式；其次，通过模型之间的比较以及与实验的类比，验证了旋流流场模式。现象，然后通过与网格无关的验证来证明数值模型。无量纲分析消除了不同时期的时间尺度差异。研究了旋流，点火器和推进加速燃烧对点火各个阶段的影响。发现：（1）旋转SRM点火过程中的时间标度主要受点火器对旋转加速度的敏感性影响（甲_IG ），其变化基于旋转过载（近似描述为经验公式α）和点火灵敏度系数极限甲_{IG，最大值}; （2）对推进剂燃烧的加速作用主要表现在压力峰值和压力比上，而对点火延迟影响不大。（3）对于具有小收缩喷嘴的小型SRM，旋流因子不是影响点火过程的主要因素。