Abstract The paper is concerned with identification of the key mechanisms controlling deflagration-to-detonation transition in unconfined gaseous systems. The issue of thermal runaway triggered by positive feedback between the advancing flame and the flame-driven precompression wave is discussed in the context of expanding spherical flames. Depending on parameters of the system the transition may occur either within a subsonic or supersonic range of flame propagation. The paper is an extension of the previous study concerned with planar flames.

中文翻译：

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重新审视从爆燃到爆轰的参数化过渡：球面几何

摘要 本文涉及确定无约束气态系统中控制爆燃到爆轰转变的关键机制。在膨胀球形火焰的背景下讨论了由前进的火焰和火焰驱动的预压缩波之间的正反馈引发的热失控问题。根据系统的参数，过渡可能发生在火焰传播的亚音速或超音速范围内。该论文是先前有关平面火焰的研究的延伸。