Hydrogen effect on flame extinction of hydrogen-enriched methane/air premixed flames: An assessment from the combustion safety point of view

Yang, Xiehe; Wang, Tiantian; Zhang, Yang; Zhang, Hai; Wu, Yuxin; Zhang, Jiansheng

doi:10.1016/j.energy.2021.122248

Cited by 27 publications

(17 citation statements)

References 41 publications

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“…(1) In the tube with a two-sided 45°branch, a symmetrical vortex structure with the opposite rotation direction is formed at the branch interface, and the vortex structure causes a complex change in the flame front. (2) The ignition location has a significant effect on the flame propagation characteristics. When ignited at IP900, the symmetrical vortex structure is deflected into the branching structure on both sides, resulting in a more complex flame structure.…”

Section: Discussionmentioning

confidence: 99%

“…Premixed methane–air is potentially dangerous in industries such as natural gas transmission, coal mining, and plant operations and can cause significant harm to personnel and production equipment. − When the premixed gas explodes in a space with complex structure, the complex structure interacts with the gas flow generated by the explosion to generate a vortex. The vortex structure leads to serious wrinkles on the flame front, increasing the flame surface area.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Study on Flame Dynamics of the Premixed Methane–Air Mixture at Different Ignition Positions in a Two-Side 45° Branch Tube

Deng

Wen

et al. 2023

ACS Omega

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The combustion characteristics of premixed methane−air flames in a half-open tube with a two-sided 45°branch structure at different ignition positions were investigated by experiments and large eddy simulations. The numerical results were compared with the experimental results to verify the correctness of the model. The results show that the simulation results are highly consistent with the experiment. This study provides a basic understanding of the effects of the branch tube structure and the ignition position on flame dynamics. When the flame propagates to the branch interface, it forms a symmetrical vortex structure at the branch tube with the opposite rotation direction. When the ignition position is at IP0 and IP900, the maximum overpressures obtained in the experiment are 10.1 and 10.7 kPa, respectively, and 9.2 and 10.4 kPa in the simulation, respectively. At IP0, the Karlovitz number indicating the interaction intensity between the flame surface and the turbulence during flame propagation is a maximum of 9.2 and a minimum of 0.04. The premixed flame has a folded small flame, a corrugated small flame, and a thin reaction zone.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on Flame Dynamics of the Premixed Methane–Air Mixture at Different Ignition Positions in a Two-Side 45° Branch Tube

Deng

Wen

et al. 2023

ACS Omega

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“…Energy quantification studies on the mechanical expansion potential produced by hydrogen during its molecular transition under ignition were developed between 2009 and 2013 at the Technology Support Lab in partnership with the HOD Research and Development Company. Safety systems were developed for explosion prevention, as the flame speed of hydrogen gas in the presence of oxygen is a thousand-fold that of gasoline [36][37][38][39].…”

Section: Fuelmentioning

confidence: 99%

Use of Hydrogen as Fuel: A Trend of the 21st Century

Farias

Barreiros²,

Silva

et al. 2022

Energies

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The unbridled use of fossil fuels is a serious problem that has become increasingly evident over the years. As such fuels contribute considerably to environmental pollution, there is a need to find new, sustainable sources of energy with low emissions of greenhouse gases. Climate change poses a substantial challenge for the scientific community. Thus, the use of renewable energy through technologies that offer maximum efficiency with minimal pollution and carbon emissions has become a major goal. Technology related to the use of hydrogen as a fuel is one of the most promising solutions for future systems of clean energy. The aim of the present review was to provide an overview of elements related to the potential use of hydrogen as an alternative energy source, considering its specific chemical and physical characteristics as well as prospects for an increase in the participation of hydrogen fuel in the world energy matrix.

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“…The use of hydrogen/natural gas blends in combustion systems is in the spotlight and is one of the most immediate alternatives for CO 2 reduction in gas-fired combustion systems as it could offer several advantages in terms of flexibility and optimum profit of the resources [11,12]. However, several challenges arise not only from the combustion process itself [13,14], but from the upstream gas blending supply, requiring detailed studies depending on the location and taking into account renewable capacity, hydrogen demand and other variables affecting logistics and storage [15].…”

Section: Introductionmentioning

confidence: 99%

Impact of H2/CH4 blends on the flexibility of micromix burners applied to industrial combustion systems

López-Ruiz

Alava²,

Ilzarbe

2023

Energy

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Hydrogen effect on flame extinction of hydrogen-enriched methane/air premixed flames: An assessment from the combustion safety point of view

Cited by 27 publications

References 41 publications

Numerical and Experimental Study on Flame Dynamics of the Premixed Methane–Air Mixture at Different Ignition Positions in a Two-Side 45° Branch Tube

Numerical and Experimental Study on Flame Dynamics of the Premixed Methane–Air Mixture at Different Ignition Positions in a Two-Side 45° Branch Tube

Use of Hydrogen as Fuel: A Trend of the 21st Century

Impact of H2/CH4 blends on the flexibility of micromix burners applied to industrial combustion systems

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