On the accuracy of laminar flame speeds measured from outwardly propagating spherical flames: Methane/air at normal temperature and pressure

Chen, Zheng

doi:10.1016/j.combustflame.2015.02.012

Cited by 225 publications

(92 citation statements)

References 77 publications

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“…Due to the experimental conditions and methods are various, the obtained laminar burning velocities are scattered. As reported by Chen and Egolfopoulos et al . , using spherical flames for calculation laminar burning velocity would result in 5% error at ambient pressure and temperature.…”

Section: Resultssupporting

confidence: 63%

The influence of N₂/CO₂ blends on the explosion characteristics of stoichiometric methane–air mixture

Chen

Yao

Deng

2018

Process Safety Progress

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In this study, the explosion parameters of stoichiometric methane-air diluted with nitrogen (N 2 )/carbon dioxide (CO 2 ) blends, that is, maximum explosion pressure (P max ), laminar burning velocity (S L ), and activation temperature (T a ), were investigated in a closed cylinder vessel. The concentrations of the dilution blends were 10% and 20%. The explosion pressure history was recorded by a pressure transducer. The results indicated that the dilution effect of CO 2 is more sensitive than that of N 2 . For a given dilution concentration, both the maximum explosion pressure and the laminar burning velocity decrease with the increase of CO 2 . In addition, the activation temperature is higher for increased CO 2 blends, demonstrating again that the diluent influence of CO 2 is more prominent.

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Section: Resultssupporting

confidence: 63%

The influence of N₂/CO₂ blends on the explosion characteristics of stoichiometric methane–air mixture

Chen

Yao

Deng

2018

Process Safety Progress

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“…It becomes challenging to ensure the homogeneity of the fuel-air mixture entering the channel. Inhomogeneity in the fuel-air mixture may lead to unstable flames due to local fluctuations in mixture equivalence ratio [29]. Various Table 1 Summary of data for burning velocities of methanol-air mixtures.…”

Section: Methodsmentioning

confidence: 99%

Measurement of laminar burning velocities of methanol–air mixtures at elevated temperatures

Katoch

Asad

Minaev

et al. 2016

Fuel

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“…35 The present study has abandoned the data of the flame surface with full-fledged cellular during data extrapolation. It is noted the flame surface is not always smooth and is sometimes populated by large cracks.…”

Section: Introductionmentioning

confidence: 97%

Laminar Flame Speeds and Kinetic Modeling of n-Pentanol and Its Isomers

Tang

Cheng

et al. 2015

Energy Fuels

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A comprehensive experimental and computational study was conducted on the laminar combustion characteristics and chemical kinetics of four pentanol isomer−air mixtures (n-pentanol, 3-methyl-1-butanol, 2-methyl-1-butanol, and 2-methyl-2-butanol). Experiments were performed at the equivalence ratios ranging from 0.6 to 1.8, three initial temperatures (393, 433, and 473 K), and four pressures (0.1, 0.25, 0.5, and 0.75 MPa) using outwardly propagating flames. Results show that the laminar flame speeds of the four pentanol isomers decrease in the order of n-pentanol, 2-methyl-1-butanol, 3-methyl-1-butanol, and 2-methyl-2-butanol. The most significant differences among the isomers are observed around the stoichiometric mixture. Simulations on the laminar flame speeds of n-pentanol and 3-methyl-1-butanol were respectively performed using the model of Heufer et al. and Sarathy et al. Comparisons between the simulations and experimental data show the n-pentanol model yields satisfactory agreement with the data at most conditions but slight overpredictions at rich mixtures and atmospheric pressure and the 3-methyl-1-butanol model yields close agreement with the data at all conditions. For 2-methyl-1-butanol, a model based on the model proposed by Tang et al. was developed and validated against the data of laminar flame speed as well as ignition delay times. Sensitivity analysis indicates that the laminar flame speeds of the isomer−air flames (n-pentanol, 3-methyl-1-butanol, and 2-methyl-1-butanol) are mainly sensitive to small molecule reactions involving H 2 −O 2 and C 1 −C 3 species but not to fuel-specific reactions. The concentrations of H 2 −O 2 and C 1 −C 3 intermediates are responsible for the laminar flame speed difference among the isomers. Additionally, butene isomers working as the important intermediates occupy different fractions in various pentanol isomer flames, confirming the differences on the chemical structure and the reaction pathways of the isomers.

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On the accuracy of laminar flame speeds measured from outwardly propagating spherical flames: Methane/air at normal temperature and pressure

Cited by 225 publications

References 77 publications

The influence of N₂/CO₂ blends on the explosion characteristics of stoichiometric methane–air mixture

The influence of N₂/CO₂ blends on the explosion characteristics of stoichiometric methane–air mixture

Measurement of laminar burning velocities of methanol–air mixtures at elevated temperatures

Laminar Flame Speeds and Kinetic Modeling of n-Pentanol and Its Isomers

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On the accuracy of laminar flame speeds measured from outwardly propagating spherical flames: Methane/air at normal temperature and pressure

Cited by 225 publications

References 77 publications

The influence of N2/CO2 blends on the explosion characteristics of stoichiometric methane–air mixture

The influence of N2/CO2 blends on the explosion characteristics of stoichiometric methane–air mixture

Measurement of laminar burning velocities of methanol–air mixtures at elevated temperatures

Laminar Flame Speeds and Kinetic Modeling of n-Pentanol and Its Isomers

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The influence of N₂/CO₂ blends on the explosion characteristics of stoichiometric methane–air mixture

The influence of N₂/CO₂ blends on the explosion characteristics of stoichiometric methane–air mixture