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Transition to detonation of an expanding spherical flame

机译:过渡到爆炸的球形火焰爆炸

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With a freely expanding unwrinkled spherical flame as an example, it is shown that deflagration-to-detonation transition in unconfined gaseous systems is possible, provided the flame is close to its propagability threshold and the deficient reactant Lewis number is not too small. The transition is triggered by the thermal runaway induced by positive feedback between the accelerating flame and the flame-driven pressure build-up. A possible way to account for the impact of wrinkling is discussed. (C) 2016 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译:以自由膨胀的无褶皱球形火焰为例,表明只要火焰接近其可传播性阈值且反应物不足的路易斯数不能太小,在无侧限气态系统中就可能发生由爆燃到爆轰的转变。过渡过程是由加速火焰与火焰驱动压力建立之间的正反馈引起的热失控触发的。讨论了一种解决皱纹影响的可能方法。 (C)2016年燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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