Effect on flow field characteristics in methane–air non-premixed flame with steam addition

Gu, Xiechong; Zang, Shusheng; Ge, Bing

doi:10.1007/s00348-006-0207-9

Cited by 8 publications

(4 citation statements)

References 14 publications

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“…At that, reactions (1) and (5) occur primarily towards the product formation, on the assumption of occurring reactions (2) and (3), which created the conditions for reaction (5). Since there is no methane in the reaction mixture at low residual oxygen content (from 0.2 to 1.2%), steam reforming occurs presumably by reaction (4).…”

Section: Experiments and Results Discussionmentioning

confidence: 99%

“…Since natural gas is mainly composed of methane (up to 98%), its burning hardly produces by-products or their amounts are much smaller than in the case of other fossil fuels. with the direct use of the products of methane-oxygen mixture combustion, is being developed actively now, for instance see [4,5]. Methane combustion occurs according to the following reactions: …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the Process of Methane-Oxygen Combustion in Steam Under the Atmospheric Pressure

Прибатурин

Bogomolov

Azikhanov

2016

EPJ Web of Conferences

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Section: Experiments and Results Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the Process of Methane-Oxygen Combustion in Steam Under the Atmospheric Pressure

Прибатурин

Bogomolov

Azikhanov

2016

EPJ Web of Conferences

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“…Thus, combined measurements of the flame characteristic properties are required for the understanding of the basic underlying physical mechanisms [32]. The emphasis of several experimental works found in the literature is the instantaneous and mean flame structure analysis and the turbulent flow field interaction [6,7,8,3,17,19,35,42]. These studies revealed the flow field structure influence by the combustion process using velocity field measurements and flame front mapping.…”

Section: Laser Diagnostics Of Turbulent Flamesmentioning

confidence: 98%

A comparative experimental study of turbulent non premixed flames stabilized by a bluff-body burner

Caetano

Silva

2015

Experimental Thermal and Fluid Science

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“…They noticed also that the Fuel-EGR method exhibited better results than the Air-EGR on pollutant emissions at the same EGR ratios. Gu et al (2006) demonstrated the significant effects of water vapor on the flame stability and recirculation zone structure. In the case of CH4-air and natural gas-air flames, LeCong and Dagaut (2009) showed that the addition of H2O led to lower flame speed, lower flame temperature, as well as lower NOx.…”

Section: Introductionmentioning

confidence: 98%

Impact of Oxygen Enrichment and CO2–H2O Dilution on Stability and Pollutant Emissions of Non-Premixed Swirling Turbulent Flames

Boushaki

Zaidaoui

Chakchak

et al. 2023

Flow Turbulence Combust

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The aim of this work is to investigate the effect of exhaust gas recirculation (EGR: water vapor and CO2), with and without O2 enrichment, on non-premixed turbulent flames stabilized on a swirl burner. The motivations include CO2 capture applications using O2 and CO2, combustion of biogas that contains CO2 and the use of EGR or H2O in certain industrial applications to reduce pollutant emissions. Experiments were carried out on a coaxial swirl burner placed in a combustion chamber of 25 kW of nominal power. The oxidant (air-O2, +H2O, +CO2) is introduced in the annular part though a swirler. The fuel (CH4) is fed though the central tube and injected radially at the exit section. The study focused on laminar burning velocity, pollutant emissions, flame stability, and flow fields measurements with different fractions of O2, H2O and CO2 in the mixture. The fraction of diluents varied from 0 to 20%, O2 concentration from 21 to 25% (in vol.) and the swirl number from 0.8 to 1.4. Different measurements were recorded: OH* chemiluminescence to locate the flame front, Stereo-PIV to analyze the flow field, pollutant emissions analysis (NOx and CO) and temperatures in the combustion chamber. Results show that dilution significantly influences flame characteristics. Dilution increases the lift-off height and reduces flame stability especially with high fractions (16-20%). O2 enrichment decreases lift-off height and enhances flame stability. Increase dilution reduces NOx and increases CO emissions. Stereo-PIV measurements highlight the turbulent coherent structure of the swirling flow and the effect of dilution on axial and tangential velocities. The effect of dilution on the underlying laminar burning velocity were determined by 1D calculation using COSILAB with GRI3.0 mechanism.

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Effect on flow field characteristics in methane–air non-premixed flame with steam addition

Cited by 8 publications

References 14 publications

Investigation of the Process of Methane-Oxygen Combustion in Steam Under the Atmospheric Pressure

Investigation of the Process of Methane-Oxygen Combustion in Steam Under the Atmospheric Pressure

A comparative experimental study of turbulent non premixed flames stabilized by a bluff-body burner

Impact of Oxygen Enrichment and CO2–H2O Dilution on Stability and Pollutant Emissions of Non-Premixed Swirling Turbulent Flames

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