Flame brush characteristics and burning velocities of premixed turbulent methane/air Bunsen flames

Tamadonfar, Parsa; Gülder, Ömer L.

doi:10.1016/j.combustflame.2014.06.014

Cited by 55 publications

(51 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The seeding particles were produced by atomizing olive oil to sub-micron droplets using a nebulizer. A similar technique has been previously used in the literature, see, for example, [24,27,[33][34][35][36][37]. The laser beam was converted into a laser sheet using a LaVision light sheet optical assembly.…”

Section: Flow Field Characterization and Test Conditionsmentioning

confidence: 99%

“…This property is controlled by the geometry and upstream location of the turbulence generator from the burner exit [24,30,31]. The r.m.s.…”

Section: Flow Field Characterization and Test Conditionsmentioning

confidence: 99%

“…The holes of the perforated plates are arranged in a hexagonal array. This method of turbulence generation has been extensively utilized in the literature, see, for example, [24,[27][28][29][30][31][32][33][34][35][36][37]. The hole diameter (d), mesh size (M), blockage ratio (β), and upstream position of the perforated plate from the burner exit (h e ) for each of the perforated plate are summarized in Table 1.…”

Section: Bunsen-type Burnermentioning

confidence: 99%

“…This necessitated additional parameters for the turbulent burning velocity correlation, namely the bulk flow velocity, burner width, and turbulent Markstein number. Tamadonfar and Gülder [24] showed that the turbulent burning velocity decreases with increasing bulk flow velocity when other turbulence statistics are kept constant. They stated that this observation may be attributed to the formation of local extinctions due to an increase of flame front stretching caused by the large velocity gradients in shear layers.…”

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Effects of mixture composition and turbulence intensity on flame front structure and burning velocities of premixed turbulent hydrocarbon/air Bunsen flames

Tamadonfar

Gülder

2015

Combustion and Flame

Self Cite

View full text Add to dashboard Cite

Section: Flow Field Characterization and Test Conditionsmentioning

confidence: 99%

“…This property is controlled by the geometry and upstream location of the turbulence generator from the burner exit [24,30,31]. The r.m.s.…”

Section: Flow Field Characterization and Test Conditionsmentioning

confidence: 99%

Section: Bunsen-type Burnermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Effects of mixture composition and turbulence intensity on flame front structure and burning velocities of premixed turbulent hydrocarbon/air Bunsen flames

Tamadonfar

Gülder

2015

Combustion and Flame

Self Cite

View full text Add to dashboard Cite

“…The effect of the equivalence ratio and turbulence intensity on the mean turbulent flame stretch factor has been studied. The flame brush thickness improved with increasing axial distance from the burner exit and equivalence ratio [17][18][19]. Levenţiu et al experimentally and numerically studied the instantaneous thermal structure of the flame front of premixed turbulent combustion of the lean methane-air mixture.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the dynamic field of turbulent premixed methane/air flame using PIV technique

Boulahlib¹,

Chekired²,

Benzitouni³

et al. 2016

Int. J. CMEM

View full text Add to dashboard Cite

This work is an experimental study of the dynamic fields of a turbulent premixed methane-air flame in a Bunsen burner. The Particle Image Velocimetry (PIV) is used to determine the dynamic fields, and Laser Sheet Tomography (LST) for the flame fronts. The turbulent main jet has a Reynolds number Re = 10 000. Turbulence is generated using perforated grids having three whose provide different inlet turbulence intensities. Velocity fields are measured for various equivalence ratio (F = 0.6-1.3) and different axial flame positions. For the reactive jet, interesting results are obtained concerning the dynamic field and the flame front. It is shown that radial profiles of U and V correspond to the axial positions located before the end of the potential core in the reactive jet. The velocity increases at the jet center to 20 m/s, and is less influenced by turbulent mixing in the flame. The greatest velocity and turbulent kinetic energy are obtained using the grid with the smallest ratio (d/M). Most important values of the radial velocity correspond to the lean flames.

show abstract

RANS Simulations of Premixed Turbulent Flames

Lipatnikov

2017

Energy, Environment, and Sustainability

View full text Add to dashboard Cite

The paper aims at assessing a hypothesis that resolution required to evaluate fuel consumption and heat release rates by directly (i.e., without a subgrid model of unresolved influence of small-scale turbulent eddies on the local flame) processing filtered fields of density, temperature, and species mass fractions should be significantly finer than resolution required to directly compute flame surface density by processing the same filtered fields. For this purpose, box filters of various widths Δ are applied to threedimensional Direct Numerical Simulation data obtained earlier by Dave et al. (Combust. Flame 196 (2018) 386-399) from a statistically one-dimensional and planar, moderately lean H2/air complexchemistry flame propagating in a box under conditions of sufficiently intense small-scale turbulence (Karlovitz number is larger than unity and a ratio of laminar flame thickness δL to Kolmogorov length scale is about 20). Results confirm this hypothesis and show that the mean flame surface density and area can be predicted with acceptable accuracy by processing filtered combustion progress variable fields computed using a sufficiently wide filter, e.g., ∆⁄δL=4⁄3. Such an approach does not require a model of the influence of subgrid turbulent eddies on flame surface density provided that ∆ and δL are of the same order of magnitude. Good performance of this approach is attributed to inability of smallscale (when compared to δL) turbulent eddies to substantially change the local flame structure, which, nevertheless, is significantly perturbed by larger turbulent eddies that strain the local flame.

show abstract

Flame brush characteristics and burning velocities of premixed turbulent methane/air Bunsen flames

Cited by 55 publications

References 29 publications

Effects of mixture composition and turbulence intensity on flame front structure and burning velocities of premixed turbulent hydrocarbon/air Bunsen flames

Effects of mixture composition and turbulence intensity on flame front structure and burning velocities of premixed turbulent hydrocarbon/air Bunsen flames

Experimental study of the dynamic field of turbulent premixed methane/air flame using PIV technique

RANS Simulations of Premixed Turbulent Flames

Contact Info

Product

Resources

About