爆炸与冲击2026，Vol.46Issue(9)：1-13,13.DOI:10.11883/bzycj-2025-0140
燃料浓度对受限空间内氢气/空气预混气体爆炸特性的影响
Influence of fuel concentration on the explosion dynamics characteristics of hydrogen/air premixed gas in confined spaces
摘要
Abstract
Hydrogen energy,as a zero-carbon energy source,holds broad application prospects in critical defense systems because of its high energy density and zero carbon emissions.To enhance energy utilization efficiency and ensure operational safety,an integrated approach combining experimental and numerical simulations was adopted to systematically examine the effects of hydrogen concentration on explosion dynamics in a confined space.Experiments were carried out in a cylindrical chamber equipped with high-frequency pressure sensors and a high-speed camera to record transient overpressure and track flame propagation behavior.Complementing the experimental setup,computational fluid dynamics simulations were implemented using a detailed 19-step hydrogen/air chemical reaction mechanism to accurately reproduce the spatiotemporal evolution of flow field velocity during the premixed gas explosion process.Results indicate that the maximum explosion pressure occurred at a hydrogen volume fraction of 30%,peaking at 0.623 94 MPa.The peak flame area was largest at both 30%and 45%,exceeding results at 15%and 60%by 14.6%and 6.3%,respectively.The 30%condition also achieved the peak flame area in the shortest time,at 8.2 ms.Furthermore,geometric constraints at the junction of the cylindrical sidewall and the endwall led to accumulation of unburned hydrogen,causing localized increases in density and pressure and resulting in four clearly discernible high-velocity regions within the flow field.At 9 ms,the flow velocity profile along the centerline exhibited symmetry with a dual-peak structure appearing unilaterally.While the 45%condition showed an early transient velocity advantage due to intensified local heat release,the 30%condition demonstrated superior late-stage velocity recovery owing to more stable and sustained combustion near the stoichiometric ratio.These findings underscore the high combustion efficiency and stability achievable near stoichiometric conditions,providing a scientific foundation for the design and optimization of high-efficiency hydrogen combustion systems.关键词
受限空间/氢气/燃料浓度/气流速度Key words
confined spaces/hydrogen/fuel concentration/flow velocity分类
数理科学引用本文复制引用
楚紫涵,曹卫国,张云,安文鑫,唐新宇,张欣,赵越,谭迎新,曹雄,尉存娟..燃料浓度对受限空间内氢气/空气预混气体爆炸特性的影响[J].爆炸与冲击,2026,46(9):1-13,13.基金项目
国家自然科学基金(12202409) （12202409）
山西省基础研究重大项目(202403021223003) （202403021223003）
山西省高等学校青年学术带头人项目(2024Q024) （2024Q024）
