氢气富集和丙烷-丁烷组成对LPG-H2预混火焰爆燃动力学的协同影响

IF 6.2 2区工程技术 Q2 ENERGY & FUELS

Combustion and Flame Pub Date : 2025-09-12 DOI:10.1016/j.combustflame.2025.114467

Zhenzhen Zhao , Yuntao Liang , Xiaoxing Zhong , Shuanglin Song , Zhenqi Liu , Tengfei Chen , Lei Liu , Lin Wang

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引用次数: 0

摘要

本研究系统研究了液化石油气（LPG）和氢（H₂）预混燃料的爆燃特性，重点研究了LPG中氢分数（XH）和丙烷比例（Xp）对最大火焰传播速度（Vmax）、最大压力（Pmax）、热扩散系数（DT）和热损失(Q)等关键参数的影响。结果表明：当XH较低（XH≤0.2）时，Vmax随LPG中Xp的增加而增加，而Pmax则减小；在较高的XH值（XH>0.2）下，XH和XP之间的协同效应显著提高了Vmax和Pmax，在高氢分数（XH=0.6）下效果最为显著。此外，增加XH和XP可以提高预混燃料的热扩散率，同时降低壁面Q，两者呈线性负相关。这些结果表明，高扩散率燃烧体系具有较好的热能利用效率，从而提高了整体燃烧反应效率。该研究为指导lpg - h2预混燃料的优化和高效利用提供了重要的理论见解和实证数据。

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Synergistic effects of hydrogen enrichment and propane-butane composition on deflagration dynamics of LPG-H2 premixed flame

This study systematically investigates the deflagration characteristics of liquefied petroleum gas (LPG) and hydrogen (H₂) premixed fuels, focusing on the influence of hydrogen fraction (X_H) and propane proportion (X_p) in LPG on key parameters such as maximum flame propagation velocity (V_max), maximum pressure (P_max), thermal diffusivity (D_T), and heat loss (Q). The results reveal that when X_H is low (X_H≤0.2), the V_max increases with the increase of the X_p in LPG, while the P_max decreases. At higher X_H values (X_H>0.2), a synergistic effect between X_H and X_P significantly enhances both V_max and P_max, with the most pronounced effect observed at a high hydrogen fraction (X_H=0.6). Furthermore, increasing both X_H and X_P improves the thermal diffusivity of the premixed fuel while reducing Q to the wall, with a linear negative correlation between the two. These findings indicate that high-diffusivity combustion systems exhibit superior thermal energy utilization efficiency, thereby enhancing the overall combustion reaction efficiency. This study provides critical theoretical insights and empirical data to guide the optimization and efficient utilization of LPG-H₂ premixed fuels.

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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.