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The dynamics of vented gas explosions

机译：排气爆炸的动力学

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摘要

The results of a large test series on vented gas explosions are herein reported (with vessel sizes ranging from 1 m3 to 100 m3 mixture of methane, propane and hydrogen with air). The pressure was not only be measured internally but also externally; the flame propagation was also recorded with a speed camera. It is shown that a very significant explosion could result from the formation and ignition of the combustible cloud outside the vent and that, in a number of circumstances, this "external" explosion would overcome the internal one. Surprising results were also obtained showing for instance that near the vent the maximum overpressure may be lower than further downstream not because the external explosion is developing far downstream but because of the local influence of rarefaction waves produced at the vent. But the mode of combustion of the external cloud is still outstanding and cannot be described by the traditional outward expanding flame kernel.
机译：本文报道了关于排气爆炸的大型测试系列的结果（容器尺寸为1 m3至100 m3的甲烷，丙烷和氢气与空气的混合物）。压力不仅可以在内部测量，而且可以在外部测量。火焰传播也用高速摄像机记录下来。结果表明，在通风口外部形成和点燃可燃云可能会引起非常明显的爆炸，而且在许多情况下，这种“外部”爆炸将克服内部爆炸。还获得了令人惊讶的结果，例如，在通风口附近，最大超压可能低于下游，这不是因为外部爆炸在很远的下游发展，而是由于在通风口产生的稀疏波的局部影响。但是外部云的燃烧方式仍然很出色，无法用传统的向外扩展火焰核来描述。

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  • 会议地点 Tampa FL(US);Tampa FL(US);Tampa FL(US)
  • 作者

    Ch. Proust; E. Leprette;

  • 作者单位

    Institut National de l'Environnement Industriel et des Risques BP 2, F-60550 Verneuil-en-Halatte;

    Institut National de l'Environnement Industriel et des Risques BP 2, F-60550 Verneuil-en-Halatte;

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  • 原文格式 PDF
  • 正文语种 eng
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