Propensity for H2 flame wrinkling, acceleration and transition to detonation from side venting, rear venting and interaction with expansion waves

H2 火焰起皱、加速以及从侧面排气、后部排气以及与膨胀波相互作用过渡到爆炸的倾向

• 批准号: 570937-2021
• 负责人: Radulescu, MateiMI
• 金额: $ 2.7万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760049
• 关键词: Propensity; H2; flame; wrinkling; acceleration

The proposed research addresses the rapid shift of the energy sector in utilizing hydrogen fuel as an energy carrier. This fundamental transformation of the energy sector provides unique opportunities for Shell and Canada in the safe production and handling of clean hydrogen and associated technologies. The project addresses the explosion safety of hydrogen gas in scenarios of fuel leaks leading to combustible cloud formation in typical distribution and storage facilities with semi-enclosed spaces and venting capabilities. We study the effect of partial venting on the flame dynamics and the potential for rapid flame acceleration potentially leading to pressure wave amplification and transition to detonation. The need for this research is due to the absence of appropriate safety guidelines and the codes and standards that are required to prevent the flame acceleration and detonation transition. Such accident scenarios have been anecdotally documented in past large-scale trials and recent accidents in the industry, such as having occurred in 2019 at a hydrogen fueling station in Norway. The objective of the present research is to clarify the mechanisms that lead to flame acceleration in the presence of partial venting and to provide quantitative criteria for safe design of installation. A computational model will also be developed in order to obtain predictive capability of these phenomena. A suite of different experimental configurations with detailed flow visualization will permit to determine the unique physical mechanisms of flame acceleration that are peculiar to hydrogen-air mixtures in the presence of expansion waves. These experiments will be complemented by high-performance direct numerical simulations. Together, the experiments and simulations will be used generate scaling laws and validation bechmarks for engineering-type numerical models. The generation of these design tools addressing the explosion safety of hydrogen will be essential to the practicing engineer. The present research will also contribute to the training of highly-qualified personnel in the emerging energy sector activities involving hydrogen gas as energy carrier.

拟议的研究解决了能源部门在利用氢燃料作为能源载体方面的快速转变。 能源行业的这一根本性转变为壳牌和加拿大在安全生产和处理清洁氢及相关技术方面提供了独特的机会。该项目解决了在燃料泄漏情况下氢气的爆炸安全问题，导致在具有半封闭空间和通风能力的典型分配和储存设施中形成可燃云。 我们研究了部分排气对火焰动力学的影响，以及快速火焰加速可能导致压力波放大和过渡到爆震的可能性。 这项研究的必要性是由于缺乏适当的安全准则和规范和标准，需要防止火焰加速和爆震过渡。 在过去的大规模试验和最近的行业事故中，这种事故场景已经被记录在案，例如2019年在挪威的一个加氢站发生的事故。 本研究的目的是澄清的机制，导致火焰加速在存在的部分通风，并提供定量标准的安全设计的安装。 还将开发一个计算模型，以获得这些现象的预测能力。 一套不同的实验配置与详细的流动可视化将允许确定火焰加速的独特的物理机制，是特有的氢-空气混合物中存在的膨胀波。 这些实验将得到高性能直接数值模拟的补充。 同时，实验和模拟将用于生成工程型数值模型的标度律和验证bechmarks。 这些设计工具的产生解决了氢气爆炸安全性将是必不可少的实践工程师。目前的研究还将有助于培训高素质的人才，在新兴的能源部门的活动，涉及氢气作为能源载体。