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Hydrogen Jet Vapor Cloud Explosion: A Model for Predicting Blast Size and Application to Risk Assessment

机译：氢喷射蒸气云爆炸：预测爆炸尺寸的模型及其在风险评估中的应用

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摘要

Releases of hydrogen at elevated pressures form turbulent jets in unconfined & uncongested regions may trigger vapor cloud explosion (VCE) as well as jet fire hazards. In the case of a delayed ignition of an unconfined & uncongested jet the turbulence induced by the jet release can lead to flame speeds sufficient to produce damaging blast loads, even in the absence of confinement or congestion. The VCE hazard posed by such high-pressure hydrogen releases is not well-recognized. The authors have previously presented test data and computational fluid dynamic (CFD) modeling analyses which characterize high pressure hydrogen releases and the associated VCE hazard in unconfined & uncongested regions. The current paper provides an overview of this VCE hazard. It presents both CFD simulations and a new simplified method. The new method determines the blast strength based on a blast curve method (i.e., TNO multienergy or BSD with the strength index correlated to the mass flow rate of the accidental release. The paper discusses also the implications of such events for building siting analyses and risk assessments.
机译：高压释放的氢气会在无约束和无拥挤的区域形成湍流射流，可能引发蒸气云爆炸（VCE）以及喷射火的危险。在无约束和无拥挤的喷气机延迟点火的情况下，由喷气释放引起的湍流可能导致足以产生破坏性爆炸载荷的火焰速度，即使在没有限制或拥挤的情况下也是如此。这种高压氢气释放造成的VCE危害尚未得到充分认识。作者之前已经提出了测试数据和计算流体力学（CFD）建模分析，这些分析表征了无约束和无拥塞区域中的高压氢气释放以及相关的VCE危险。当前论文概述了这种VCE危害。它介绍了CFD模拟和新的简化方法。该新方法基于爆炸曲线法（即TNO多能或BSD，其强度指数与意外释放的质量流量相关）来确定爆炸强度。本文还讨论了此类事件对建筑物选址分析和风险的影响。评估。

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