Dynamics of Lean-Premixed Turbulent Combustion at High Turbulence Intensities

Yuen, Frank T. C.; Gülder, Ömer L.

doi:10.1080/00102200903463274

Cited by 28 publications

(11 citation statements)

References 28 publications

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“…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%

“…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%

“…To evaluate the local flame front curvature, the instantaneous flame front was filtered using a zero-phase digital filter which is a built-in script in MATLAB. This type of filter was previously utilized in the literature for the same purpose, see, for example, [33][34][35]78]. The length of the filter was selected to be five points, which provided a filter order of four.…”

Section: Two-dimensional Local Flame Front Curvaturementioning

confidence: 99%

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

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Section: Flow Field Characterization and Test Conditionsmentioning

confidence: 99%

Section: Bunsen-type Burnermentioning

confidence: 99%

Section: Two-dimensional Local Flame Front Curvaturementioning

confidence: 99%

See 1 more Smart Citation

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

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“…The experimentally studied cases comprise a Bunsen burner [42] and a bluff-body burner [43]. The third case is the combustion chamber in a Ricardo Hydra internal combustion engine, including a relatively simple piston [44].…”

Section: Test Geometriesmentioning

confidence: 99%

A mesh partitioning algorithm for preserving spatial locality in arbitrary geometries

Nivarti

Salehi

Bushe

2015

Journal of Computational Physics

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“…It is known that high Re t increases the range of eddy sizes as well as the rotational velocity of eddies of a given size. Previous imaging of flame structure was done primarily for Re t less than 2,000 [1][2][3][4][5][6][7][8][9][10][11][12] . Flamelets were found to exist and the flame surface nearly always was continuous; no holes were observed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Premixed Turbulent Combustion in High Reynolds Number Regimes using PLIF

Temme

Skiba

Wabel

et al. 2014

52nd Aerospace Sciences Meeting

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Premixed turbulent flame structures are imaged with simultaneous formaldehyde and OH PLIF. A new piloted burner was designed to achieve high turbulent Reynolds numbers (Re t ) up to 68,000 and low Damköhler numbers (Da t ). Primary reaction zones are identified by the overlap of the OH and formaldehyde signals and preheat zones of low temperature secondary reactions are identified from the formaldehyde signal. At low Re t of 600, the primary reaction zones are continuous and products do not mix with reactants. This results in thin preheat layers and relatively thin flamelets. As Re t increases, the primary reaction zones become shredded and disconnected. This allows mixing of the hot products with the reactants and broadens the preheat/secondary reaction zones. Additionally, the reaction layers are typically 4-5 times thicker than those in a laminar flamelet. Interestingly, as Re t increases further, the thickness of the reaction layers only increases slowly, but the total area of reaction regions grows rapidly. I. IntroductionHERE are several gaps in our fundamental understanding of the physics of premixed turbulent flames. Many previous studies 1-10 have been conducted at large turbulence intensities (u'/S L ) but at small values of integral scale , which usually is normalized by laminar flame thickness ). The r.m.s. velocity fluctuation is u' and S L is the unstretched laminar burning velocity. However in many realistic devices it is the product of u' and that is large. Therefore the present work focuses on the regime of large turbulence Reynolds numbers (Re t ) and small Damköhler numbers (Da t ) where:

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Dynamics of Lean-Premixed Turbulent Combustion at High Turbulence Intensities

Cited by 28 publications

References 28 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

A mesh partitioning algorithm for preserving spatial locality in arbitrary geometries

Experimental Investigation of Premixed Turbulent Combustion in High Reynolds Number Regimes using PLIF

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