Pilot impact on turbulent premixed methane/air and hydrogen-enriched methane/air flames in a laboratory-scale gas turbine model combustor

Pignatelli, Francesco; Kim, H.; Subash, Arman Ahamed; Liu, X.; Szász, Róbert Zoltán; Bai, Xue‐Song; Brackmann, Christian; Aldén, Marcus; Lörstad, Daniel

doi:10.1016/j.ijhydene.2022.05.282

Cited by 21 publications

(7 citation statements)

References 38 publications

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“…It has also been shown that as the hydrogen content increases, the flame length shortens while the combustion temperature increases [12][13][14][15][16]. It has also been shown that the proportions of CO, CO 2 and NO X emissions change with the addition of hydrogen in contrast to pure methane [13,17,18]. The trend of NO X emissions is therefore consistent with Zhan et al [13] and Pignatelli et al [18].…”

Section: Literature Review On Hydrogen-natural Gas Mixtures (Summary)supporting

confidence: 83%

“…The trend of NO X emissions is therefore consistent with Zhan et al [13] and Pignatelli et al [18]. On the other hand, the development of CO emissions in Pignatelli et al [18] differs significantly from Zhan et al [13]. Zhan et al [13] found an increase in CO emissions significantly below the initial value of pure methane reported by Pignatelli et al [18].…”

Section: Literature Review On Hydrogen-natural Gas Mixtures (Summary)supporting

confidence: 82%

“…It has also been shown that the proportions of CO, CO 2 and NO X emissions change with the addition of hydrogen in contrast to pure methane [13,17,18]. The trend of NO X emissions is therefore consistent with Zhan et al [13] and Pignatelli et al [18]. On the other hand, the development of CO emissions in Pignatelli et al [18] differs significantly from Zhan et al [13].…”

Section: Literature Review On Hydrogen-natural Gas Mixtures (Summary)supporting

confidence: 75%

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Hydrogen in the Natural Gas Network—Relevance for Existing Fire Precautions

Dinkov,

Braun,

Schelb

2024

Fire

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Power-to-gas technology can be used to convert excess power from renewable energies to hydrogen by means of water electrolysis. This hydrogen can serve as “chemical energy storage” and be converted back to electricity or fed into the natural gas grid. In the presented study, a leak in a household pipe in a single-family house with a 13 kW heating device was experimentally investigated. An admixture of up to 40% hydrogen was set up to produce a scenario of burning leakage. Due to the outflow and mixing conditions, a lifted, turbulent diffusion flame was formed. This led to an additional examination point and expanded the aim and novelty of the experimental investigation. In addition to the fire safety experimental simulation of a burning leakage, the resulting complex properties of the flame, namely the lift-off height, flame length, shape and thermal radiation, have also been investigated. The obtained results of this show clearly that, as a consequence of the hydrogen addition, the main properties of the flame, such as lifting height, flame temperature, thermal radiation and total heat flux densities along the flame, have been changed. To supplement the measurements with thermocouples, imaging methods based on the Sobel gradient were used to determine the lifting height and the flame length. In order to analyze the determined values, a probability density function was created.

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Section: Literature Review On Hydrogen-natural Gas Mixtures (Summary)supporting

confidence: 83%

Section: Literature Review On Hydrogen-natural Gas Mixtures (Summary)supporting

confidence: 82%

Section: Literature Review On Hydrogen-natural Gas Mixtures (Summary)supporting

confidence: 75%

See 1 more Smart Citation

Hydrogen in the Natural Gas Network—Relevance for Existing Fire Precautions

Dinkov,

Braun,

Schelb

2024

Fire

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“…Various researchers investigated the influence of hydrogen addition on combustion properties of methane, indicating that incorporation of hydrogen into methane fuel leads to an enhancement in flame properties. Pignateli et al [1] investigated the impact of hydrogen addition on industrial concentric annular ring burner with pilot flame, and they observed that the NOx and CO emissions decreased with increasing hydrogen concentration in the non-premixed pilot flame. Gee et al [2] investigated experimentally hydrogen addition strategy to control the emissions and flame appearance properties in turbulent non-premixed hydrogen-blended flame in industrial low-swirl burner.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of methane-air jet flame with hydrogen addition in industrial kiln burners

Liu,

Rigola,

Schillaci

et al. 2024

J. Phys.: Conf. Ser.

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Emission reduction and decarbonisation in the industry are crucial for low-carbon industry and energy transition at the global level. Replacing traditional fossil fuel with clean energy is an effective approach to reduce carbon emissions and optimize energy efficiency in manufacturing processes. Industrial kiln, which requires high natural gas fuel consumption, typically releases amounts of harmful combustion products. In this paper, the objective is to study the influence of hydrogen addition into methane-air jet flame in industrial kiln burners. The industrial burner analysed in this study is a cylinder vessel with axial orifices and swirl turbulent co-flow air jets in the fuel-air inlet structure. A more recent reduced chemical kinetic mechanism for methane-hydrogen combustion is utilized in the present flame simulation and validated in benchmark flames. The chemical mechanism involves 45 reactions and 18 species. Various methane-hydrogen blending fuels are studied in the jet flame, where flame structure and flame characteristics including chemical species, temperature, and velocity are predicted.

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“…The explosion process of premixed gas in tubes is usually unstable, and it would be affected by various fluid dynamics and combustion instabilities, such as Darrieus−Landau, 5 acoustic waves, Rayleigh−Taylor instability, vortices, etc. 6,7 Many experiments have been conducted to show that the premixed gas deflagration process in the tube is influenced by factors such as the initial temperature, 8 the gas concentration, 9 the ignition location, 10 the tube aspect ratio, 11 and the branching structure. 12 In the process of industrial production, complex tube structures may increase the harm caused by the explosion.…”

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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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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Pilot impact on turbulent premixed methane/air and hydrogen-enriched methane/air flames in a laboratory-scale gas turbine model combustor

Cited by 21 publications

References 38 publications

Hydrogen in the Natural Gas Network—Relevance for Existing Fire Precautions

Hydrogen in the Natural Gas Network—Relevance for Existing Fire Precautions

Numerical investigation of methane-air jet flame with hydrogen addition in industrial kiln burners

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

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