Laminar burning velocities and flame characteristics of CO–H2–CO2–O2 mixtures

Wang, Jinhua; Huang, Zuohua; Kobayashi, Haruo; Ogami, Yasuhiro

doi:10.1016/j.ijhydene.2012.07.103

Cited by 94 publications

(35 citation statements)

References 34 publications

(39 reference statements)

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“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]) at ambient pressure and temperature. The syngas studies at elevated pressure and/or temperature attracted more interest in recent years.…”

Section: Introductionmentioning

confidence: 99%

Laminar flame speeds of H 2 /CO with CO 2 dilution at normal and elevated pressures and temperatures

Han

Chen

et al. 2015

Fuel

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Section: Introductionmentioning

confidence: 99%

Laminar flame speeds of H 2 /CO with CO 2 dilution at normal and elevated pressures and temperatures

Han

Chen

et al. 2015

Fuel

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“…The higher the density jump is, the stronger the destabilization becomes. Flame thickness (δ) can be determined by the temperature profile of the flame structure [40], which is calculated as:…”

Section: Thermal Expansion Ratio and Flame Thicknessmentioning

confidence: 99%

“…The cellular instabilities of mixtures of premixed hydrogen-hydrocarbon-air flames have also been studied by many scholars [30][31][32][33][34][35]. Nevertheless, studies about cellular instabilities of premixed syngas flames are relatively sparse, and most of the reported articles were mainly focused on cellular instabilities induced by the addition of inert gas or hydrocarbon under selected hydrogen fractions [36][37][38][39][40]. As a matter of fact, syngas is a blended fuel which mainly consists of H 2 and CO, so the cellular instabilities of syngas premixed flames are very complex due to the hydrogen fraction variation.…”

Section: Introductionmentioning

confidence: 99%

Research on Cellular Instabilities of Lean Premixed Syngas Flames under Various Hydrogen Fractions Using a Constant Volume Vessel

Sun

et al. 2014

Energies

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An experimental study of the intrinsic instabilities of H 2 /CO lean (φ = 0.4 to φ = 1.0) premixed flames at different hydrogen fractions ranging from 0% to 100% at elevated pressure and room temperature was performed in a constant volume vessel using a Schlieren system. The unstretched laminar burning velocities were compared with data from the previous literature and simulated results. The results indicate that excellent agreements are obtained. The cellular instabilities of syngas-air flames were discussed and critical flame radii were measured. When hydrogen fractions are above 50%, the flame tends to be more stable as the equivalence ratio increases; however, the instability increases for flames of lower hydrogen fractions. For the premixed syngas flame with hydrogen fractions greater than 50%, the decline in cellular instabilities induced by the increase in equivalence ratio can be attributed to a reduction of diffusive-thermal instabilities rather than increased hydrodynamic instabilities. For premixed syngas flames with hydrogen fractions lower than 50%, as the equivalence ratio increases, the cellular instabilities become more evident because the enhanced hydrodynamic instabilities become the dominant effect. For premixed syngas flames, the enhancement of cellular instabilities induced by the increase in hydrogen fraction is the result of both increasing diffusive-thermal and hydrodynamic instabilities.

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“…The local flamelet of turbulent premixed flame is strongly wrinkled convex and concave structure, which is corresponding to positive and negative curvature structure [4]. Planar strained flamelets as a model of positive stretch flames has been widely studied by using laminar flat burner [5][6][7][8] as well as outwardly spherical propagating laminar flames [9][10][11]. A simple prototype of the negative stretched flame is the flame tip of laminar premixed Bunsen flame [12].…”

Section: Introductionmentioning

confidence: 99%

“…Some studies on syngas fuel have been conducted to investigate the combustion characteristics [11,21,[23][24][25][26][27]. Besides, the instantaneous flame front structure of the turbulent premixed flames of syngas/ air mixtures has been measured by the authors [4,28] to investigate the turbulence-flame interaction.…”

Section: Introductionmentioning

confidence: 99%

Effects of stretch and preferential diffusion on tip opening of laminar premixed Bunsen flames of syngas/air mixtures

Wang

Wei

Shu

et al. 2015

Fuel

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Laminar burning velocities and flame characteristics of CO–H2–CO2–O2 mixtures

Cited by 94 publications

References 34 publications

Laminar flame speeds of H 2 /CO with CO 2 dilution at normal and elevated pressures and temperatures

Laminar flame speeds of H 2 /CO with CO 2 dilution at normal and elevated pressures and temperatures

Research on Cellular Instabilities of Lean Premixed Syngas Flames under Various Hydrogen Fractions Using a Constant Volume Vessel

Effects of stretch and preferential diffusion on tip opening of laminar premixed Bunsen flames of syngas/air mixtures

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