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Deflagration-to-detonation transition in an unconflned space

机译:密闭空间内的爆燃-爆轰过渡

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摘要

Whereas deflagration-to-detonation transition in confined systems is a matter of common knowledge, feasibility of the transition in unconfined space is still a matter of controversy. With a freely expanding self-accelerating spherical flame as an example, it is shown that deflagration-to-detonation transition in unconfined gaseous systems is indeed possible provided the flame is large enough. The transition is caused by positive feedback between the accelerating flame and the flame-driven pressure buildup, which results in the thermal runaway when the flame speed reaches a critical level.
机译:虽然在密闭系统中由爆燃到爆轰的过渡是一个常识,但在密闭空间内过渡的可行性仍是一个有争议的问题。以自由膨胀的自加速球形火焰为例,显示出只要火焰足够大,在无侧限气态系统中的爆燃到爆轰过渡确实是可能的。过渡是由加速火焰与火焰驱动压力建立之间的正反馈引起的,当火焰速度达到临界水平时,这会导致热失控。

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