Ignition delay time and methane time history in hydrogen-natural gas surrogate blends: A shock tube study

IF 5.8 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2025-04-24 DOI:10.1016/j.combustflame.2025.114191

Wanting Jia , Shubao Song , Lin Zhang , Cheng Wang , Pavel Krivosheyev , Dongping Chen , Jiankun Shao

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Abstract

The pipeline transportation of hydrogen-blended natural gas offers an efficient large-scale solution while introducing new safety and technical challenges. This study investigates the combustion characteristics of hydrogen-natural gas blends, using pure methane and a 1% C₃H₈/99% CH₄ mixture as natural gas surrogates. Ignition delay times and methane time histories were measured in a shock tube for hydrogen–natural gas surrogate blends containing 10 %, 20 % and 30 % hydrogen (by mole fraction of the fuel component) at 1305–1729 K, 1 atm, and equivalence ratios of 0.5, 1.0 and 2.0. High-precision in-situ methane concentration data were obtained using 3175 nm laser absorption diagnostics. The results indicate that hydrogen addition significantly enhances methane consumption rate and overall reactivity. The Aramco Mech 3.0, NUIG Mech 1.3, FFCM-2, USC Mech Ⅱ and GRI Mech 3.0 kinetic models were evaluated against the present experimental data. The rate constants of three key reactions in the Aramco Mech 3.0, NUIG Mech 1.3, and FFCM-2 kinetic models were revised, resulting in simulation results that show improved agreement with the experimental data for ignition delay times and methane time histories. This study provides both experimental and modeling studies on the combustion characteristics of hydrogen-natural gas blends, contributing to the safe transportation and utilization of hydrogen.

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氢-天然气替代混合物的点火延迟时间和甲烷时间史：激波管研究

氢混合天然气的管道输送提供了一种高效的大规模解决方案，同时也带来了新的安全和技术挑战。本研究以纯甲烷和1% C3H8/99% CH4混合物为天然气替代品，研究了氢-天然气共混物的燃烧特性。在激波管中测量了含有10%、20%和30%氢（按燃料成分的摩尔分数）的氢-天然气替代混合物的点火延迟时间和甲烷时间历史，温度为1305-1729 K， 1atm，当量比为0.5、1.0和2.0。利用3175 nm激光吸收诊断技术获得了高精度的原位甲烷浓度数据。结果表明，加氢能显著提高甲烷消耗速率和总反应活性。根据实验数据对Aramco Mech 3.0、NUIG Mech 1.3、FFCM-2、USC MechⅡ和GRI Mech 3.0的动力学模型进行了评价。对Aramco Mech 3.0、NUIG Mech 1.3和FFCM-2动力学模型中三个关键反应的速率常数进行了修正，结果表明，在点火延迟时间和甲烷时程方面，模拟结果与实验数据的吻合度有所提高。本研究对氢-天然气混合物的燃烧特性进行了实验和模拟研究，为氢的安全运输和利用做出了贡献。

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来源期刊

Combustion and Flame 工程技术-工程：化工

CiteScore

9.50

自引率

20.50%

发文量

631

审稿时长

3.8 months

期刊介绍： The mission of the journal is to publish high quality work from experimental, theoretical, and computational investigations on the fundamentals of combustion phenomena and closely allied matters. While submissions in all pertinent areas are welcomed, past and recent focus of the journal has been on: Development and validation of reaction kinetics, reduction of reaction mechanisms and modeling of combustion systems, including: Conventional, alternative and surrogate fuels; Pollutants; Particulate and aerosol formation and abatement; Heterogeneous processes. Experimental, theoretical, and computational studies of laminar and turbulent combustion phenomena, including: Premixed and non-premixed flames; Ignition and extinction phenomena; Flame propagation; Flame structure; Instabilities and swirl; Flame spread; Multi-phase reactants. Advances in diagnostic and computational methods in combustion, including: Measurement and simulation of scalar and vector properties; Novel techniques; State-of-the art applications. Fundamental investigations of combustion technologies and systems, including: Internal combustion engines; Gas turbines; Small- and large-scale stationary combustion and power generation; Catalytic combustion; Combustion synthesis; Combustion under extreme conditions; New concepts.