Dynamics of flame/vortex interactions

Renard, Paul-Henry; Thévenin, Dominique; Rolon, Juan-Carlos; Candel, Sébastien

doi:10.1016/s0360-1285(00)00002-2

Cited by 286 publications

(112 citation statements)

References 169 publications

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“…The behaviour of a premixed flame moving through a turbulent flow field is strongly affected by the nature of the vortex structures present along the flame path [20]. The flame-vortex interaction may lead the flame to propagate according to different turbulent combustion regimes, which are dependent on both size and velocity of the vortices.…”

Section: Introductionmentioning

confidence: 99%

Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures

Sarli

Benedetto

Long

et al. 2012

International Journal of Hydrogen Energy

129

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Additional Information:• NOTICE: this is the author's version of a work that was accepted for publication in the International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was sub- Regardless of the mixture stoichiometry, the hydrogen substitution to methane leads to a transition from a regime in which the vortex only wrinkles the flame front (x H2 < 0.2) to a * Corresponding author. Phone: +39 0817622673; Fax: +39 0817622915; E-mail address: valeria.disarli@irc.cnr.it 3 more vigorous regime in which the interaction almost results in the separation of small flame pockets from the main front (x H2 > 0.2). This transition was characterised in terms of time histories of flame surface area and burning rate.

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Section: Introductionmentioning

confidence: 99%

Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures

Sarli

Benedetto

Long

et al. 2012

International Journal of Hydrogen Energy

129

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“…Section 2 defines the general flame/vortex interaction problem that will be solved numerically. Such flame vortex interactions were extensively investigated to describe fundamental combustion processes (see, e.g., [57,58,59,60,61,62]), and they also have been examined in some clever experiments (see, e.g., [63,64,65,66,67,68,69]). An AMR technique was also recently coupled with a level-set method in [70] to describe flame/vortex interaction problems.…”

Section: Introductionmentioning

confidence: 99%

Time–space adaptive numerical methods for the simulation of combustion fronts

Duarte¹,

Descombes²,

Tenaud³

et al. 2013

Combustion and Flame

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To cite this version:Max Duarte, Stéphane Descombes, Christian Tenaud, Sébastien Candel, Marc Massot. Time-space adaptive numerical methods for the simulation of combustion fronts. Combustion and Flame, Elsevier, 2013, 160 (6) AbstractThis paper presents a new computational strategy for the simulation of combustion fronts based on adaptive time operator splitting and spatial multiresolution. High-order and dedicated onestep solvers compose the splitting scheme for the reaction, diffusion, and convection subproblems, to independently cope with their inherent numerical difficulties and to properly solve the corresponding temporal scales. Adaptive and thus highly compressed spatial representations for localized fronts originating from multiresolution analysis result in important reductions of memory usage, and hence numerical simulations with sufficiently fine spatial resolution can be performed with standard computational resources. The computational efficiency is further enhanced by splitting time steps established beyond standard stability constraints associated to mesh size or stiff source time scales. The splitting time steps are chosen according to a dynamic splitting technique relying on solid mathematical foundations, which ensures error control of the time integration and successfully discriminates time-varying multi-scale physics. For a given semidiscretized problem, the solution scheme provides dynamic accuracy estimates that reflect the quality of numerical results in terms of numerical errors of integration and compressed spatial representations, for general multi-dimensional problems modeled by stiff PDEs. The strategy is efficiently applied to simulate the propagation of laminar premixed flames interacting with vortex structures, as well as various configurations of self-ignition processes of diffusion flames in similar vortical hydrodynamics fields. A detailed study of the error control is provided and show the potential of the approach. It yields large gains in CPU time, while consistently describing a broad spectrum of space and time scales as well as different physical scenarios.

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“…1,2 Often, the characteristic scales associated with the combustion processes are smaller than the smallest scales of the turbulence. 3 Then, combustion occurs in the form of laminar flames embedded in thin mixing layers that are locally distorted and strained by vortices of different scales.…”

Section: Introductionmentioning

confidence: 99%

“…These limitations, discussed in detail by Cuenot and Poinsot,7 have led to the development of flamelet models including transient effects 8 and, more recently, to the development of the so-called unsteady flamelet approach. 9 Recent theoretical, numerical, and experimental analyses have tried to quantify unsteady and curvature effects studying the response of a one-dimensional laminar flame to variable strain rate 5,[10][11][12][13][14][15] and the interaction of vortices with flames ͑see the recent review article by Renard et al 2 and references therein͒.…”

Section: Introductionmentioning

confidence: 99%

On the interaction of vortices with mixing layers

Vera

Liñán

2004

Physics of Fluids

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We describe the perturbations introduced by two counter-rotating vortices-in a two-dimensional configuration-or by a vortex ring-in an axisymmetric configuration-to the mixing layer between two counterflowing gaseous fuel and air streams of the same density. The analysis is confined to the near stagnation point region, where the strain rate of the unperturbed velocity field, A 0 , is uniform. We restrict our attention to cases where the typical distance 2r 0 between the vortices-or the characteristic vortex ring radius r 0 -is large compared to both the thickness, ␦ v , of the vorticity core and the thickness, ␦ m ϳ(/A 0 ) 1/2 , of the mixing layer. In addition, we consider that the ratio, ⌫/, of the vortex circulation, ⌫, to the kinematic viscosity, , is large compared to unity. Then, during the interaction time, A 0 Ϫ1 , the viscous and diffusion effects are confined to the thin vorticity core and the thin mixing layer, which, when seen with the scale r 0 , appears as a passive interface between the two counterflowing streams when they have the same density. In this case, the analysis provides a simple procedure to describe the displacement and distortion of the interface, as well as the time evolution of the strain rate imposed on the mixing layer, which are needed to calculate the inner structure of the reacting mixing layer as well as the conditions for diffusion flame extinction and edge-flame propagation along the mixing layer. Although in the reacting case variable density effects due to heat release play an important role inside the mixing layer, in this paper the analysis of the inner structure is carried out using the constant density model, which provides good qualitative understanding of the mixing layer response.

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Dynamics of flame/vortex interactions

Cited by 286 publications

References 169 publications

Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures

Time-Resolved Particle Image Velocimetry of dynamic interactions between hydrogen-enriched methane/air premixed flames and toroidal vortex structures

Time–space adaptive numerical methods for the simulation of combustion fronts

On the interaction of vortices with mixing layers

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