Reports and reviews issued by the Health and Safety Executive (HSE) have a wide‐ranging influence that extends well beyond the United Kingdom. One such recent document, RR1113 Review of Vapor Cloud Explosion Incidents, discusses explosions arising from the ignition of large vapor clouds. The report proposes a mechanism called “Episodic Deflagration” which has been proposed as an alternative to Deflagration to Detonation Transition (DDT). Here, we examine the concept and the assumptions behind this mechanism in detail. We examine fundamentals purported to characterize this mechanism such as the so‐called cumulative build‐up of pressure over time, an assumed stationary flame state and the radiant heating mechanism proposed as the basis for this postulated phenomenon. We show that the concept is fundamentally flawed and built on unrealistic assumptions, leading to the conclusion that this phenomenon should be ignored.

中文翻译：

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在无边无际的大型蒸气云中发生爆燃的神话

健康与安全执行官（HSE）发布的报告和评论具有广泛的影响力，其影响范围远远超出英国。这样的最新文件之一，RR1113蒸气云爆炸事件回顾讨论了大蒸气云点火引起的爆炸。该报告提出了一种名为“ Epicisodic De爆燃”的机制，该机制是爆燃向爆轰过渡（DDT）的替代方案。在这里，我们将详细研究此机制背后的概念和假设。我们研究了据称表征该机制的基本原理，例如随着时间推移而形成的所谓压力累积，假定的稳态火焰状态和建议作为该假定现象基础的辐射加热机制。我们表明该概念从根本上是有缺陷的，并且建立在不切实际的假设之上，从而得出结论，应忽略这种现象。