Experimental and numerical study of premixed, lean ethylene flames

Delfau, Jean‐Louis; Biet, Joffrey; Idir, Mahmoud; Pillier, Laure; Vovelle, C.

doi:10.1016/j.proci.2006.07.167

Cited by 23 publications

(15 citation statements)

References 21 publications

(19 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The preheat zone temperature gradient is seen to consist of two slopes, namely a flatter gradient from 2.25 mm to 3.25 mm and a steeper one from 3.25 mm to 3.75 mm. This has been observed in previous works 3,11,12 and is characteristic of premixed laminar flames. The effect of the strain rates on the flame location can be clearly observed from the temperature profiles in Fig.…”

Section: Resultssupporting

confidence: 82%

Temperature measurements in a wall stabilized steady flame using CARS

Giri

Lacoste

Damazo

et al. 2017

55th AIAA Aerospace Sciences Meeting

View full text Add to dashboard Cite

Flame quenching by heat loss to a surface continues to be an active area of combustion research. Close wall temperature measurements in an isothermal wall-stabilized flame are reported in this work. Conventional N2-vibrational Coherent Anti-Stokes Raman Scattering (CARS) thermometry as close as 275 µm to a convex wall cooled with water has been carried out. The standard deviation of mean temperatures is observed to be ~6.5% for high temperatures (>2000K) and ~14% in the lower range (<500K). Methane/air and ethylene/air stoichiometric flames for various global strain rates based on exit bulk velocities are plotted and compared. CH* chemiluminescence is employed to determine the flame location relative to the wall. Flame locations are shown to move closer to the wall with increasing strain rates in addition to higher near-wall temperatures. Peak temperatures for ethylene are considerably higher (~250-300K) than peak temperatures for methane. Preheat zone profiles are similar for different strain rates across fuels. This work demonstrates close wall precise temperature measurments using CARS.

show abstract

Section: Resultssupporting

confidence: 82%

Temperature measurements in a wall stabilized steady flame using CARS

Giri

Lacoste

Damazo

et al. 2017

55th AIAA Aerospace Sciences Meeting

View full text Add to dashboard Cite

show abstract

“…A general agreement is observed between predicted and measured mole fraction profiles. These results are in accordance with those obtained by Delfau et al (2007).…”

Section: Hydrocarbonssupporting

confidence: 93%

“…These two experimental works have been performed with argon as thinner but not nitrogen, and they worked at low pressure. Delfau et al (2007) studied the laminar flat flame C 2 H 4 /O 2 /N 2 at the equivalence ratios of 0.5 and 0.7, at atmospheric pressure, to understand the ethylene oxidation in lean conditions. Their objective was to check the ability of four detailed reaction mechanisms (Konnov, UCSD, UDEL and Dagaut) to correctly predict the temperature and species mole fraction profiles.…”

Section: Introductionmentioning

confidence: 99%

Formation of carbonyl compounds in lean premixed atmospheric-pressure Ethylene/O<sub>2</sub>/N<sub>2</sub> flames

Seydi

Biet²,

Delfau³

et al. 2015

Int. J. Bio. Chem. Sci

View full text Add to dashboard Cite

Motivated by a better understanding of lean-fuel combustion, the present study has determined experimentally the chemical structure of four lean ethylene-oxygen-nitrogen flames stabilized on the flat-flame burner at atmospheric pressure (φ = 0.47, 0.508, 0.693 and 0.81). Species mole fraction profiles were also computed by the Premix code (Chemkin II version) and three detailed reaction mechanisms .A very good agreement was observed between the main flame properties: reactants consumption, final products (CO 2 , H 2 O), main intermediates, and other hydrocarbons in small concentrations, and the modeling. A special care was brought to the examination of the relative importance of carbonyl compounds formation and consumption, mainly (CH 2 O and CH 3 CHO). Pathway analyses were performed to identify the formation from the direct consumption of ethylene through the C 2 H 3 and CH 2 HCO. Sensitivity analyses were also performed in order to delineate the most sensitive reaction on the formation and consumption of these two carbonyl compounds.

show abstract

“…A higher laminar flame speed of 21 cm/s and a thinner flame is obtained with the UCSD mechanism, compared to 16.2 cm/s and a thicker flame for the USC mechanism. Despite this difference in 0 , L S the flame structure in terms of temperature and major species variations obtained using these two mechanisms are very similar and they are consistent with previous study (Delfau et al, 2007) comparing lean ethylene flame structure computed using these two mechanisms and experimental measurements. Also, a previous study (Xu and Konnov, 2012) showed that the laminar flame speeds produced by these two mechanisms were within the scatter of many past experimental measurements.…”

Section: Cfd Setupsupporting

confidence: 90%

Computation of Forced Premixed Flames Dynamics

Ruan

Dunstan

Swaminathan

et al. 2016

Combustion Science and Technology

View full text Add to dashboard Cite

Bluff body stabilised turbulent premixed flames subject to inlet velocity oscillation over a wide range of forcing frequency and amplitude are simulated using a flameletbased combustion model. Two sets of detailed chemical kinetic schemes are used to model combustion chemistry. It is observed that the computed dynamics of forced flames agree reasonably well with experimental measurements. The flame elongation and shortening at a frequency of 40 Hz and strong flame-vortex interaction at a higher frequency of 160 Hz are captured well in the computations. The global flame describing function extracted from the computational results shows a linear response at 40 Hz and a nonlinear behaviour at 160 Hz as observed in the experiments. The nonlinear response is due to vortex roll-up and its subsequent shedding. The quantitative agreement of the computed flame describing function (FDF) with experimental measurement is uniformly good over a wide range of forcing frequency and amplitude. SomeA c c e p t e d M a n u s c r i p t influence of chemical kinetics on the FDFs is observed, which mainly stems from the difference in laminar burning velocity and spatial heat release rate distribution.

show abstract

Experimental and numerical study of premixed, lean ethylene flames

Cited by 23 publications

References 21 publications

Temperature measurements in a wall stabilized steady flame using CARS

Temperature measurements in a wall stabilized steady flame using CARS

Formation of carbonyl compounds in lean premixed atmospheric-pressure Ethylene/O<sub>2</sub>/N<sub>2</sub> flames

Computation of Forced Premixed Flames Dynamics

Contact Info

Product

Resources

About