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A detonation paradox: Why inviscid detonation simulations predict the incorrect trend for the role of instability in gaseous cellular detonations?

机译:爆炸悖论:为什么无粘性爆炸模拟会预测不稳定性在气态细胞爆炸中的作用的不正确趋势?

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摘要

Experiments conducted over the past several decades have shown that the cellular structure of detonations is responsible for enhancing the detonability of gaseous detonations in the presence of losses, as compared with that predicted by the classical Zel’dovich-Von Neuman-Döring model for detonations, which neglects the time varying cellular structure of the front. Paradoxically, numerical studies conducted over the past decade have revealed that the propagation of inviscid detonations was hampered if the detonation was allowed to have a cellular structure, the effect increasing with the cellular irregularity. This apparent paradox is discussed in relation to the burning mechanism of unstable cellular detonations established experimentally, which shows that diffusive effects control the reaction of approximately half of the gases passing across the detonation front in unstable cellular detonations.
机译:与经典Zel'dovich-VonNeuman-Döring模型所预测的相比,过去几十年进行的实验表明,在损失存在的情况下,爆炸的孔结构可增强气体爆炸的爆炸性,忽略了前部随时间变化的细胞结构。矛盾的是,在过去的十年中进行的数值研究表明,如果允许爆炸具有细胞结构,无粘性爆炸的传播就会受到阻碍,这种影响会随着细胞的不规则性而增加。讨论了与实验确定的不稳定细胞爆炸的燃烧机理有关的明显矛盾,这表明扩散作用控制了不稳定细胞爆炸中穿过爆炸前沿的大约一半气体的反应。

著录项

  • 来源
    《Combustion and Flame》 |2018年第9期|151-162|共12页
  • 作者

    Matei I. Radulescu;

  • 作者单位

    Department of Mechanical Engineering, University of Ottawa;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Detonation wave structure; Detonation limits;

    机译:爆轰波结构;爆轰极限;

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