Numerical and experimental study of “tulip” flame formation in a closed vessel

Dunn‐Rankin, Derek; Barr, P. K.; Sawyer, Robert F.

doi:10.1016/s0082-0784(88)80360-6

Cited by 98 publications

(44 citation statements)

References 11 publications

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“…Using an evolution equation in the limit of weak thermal expansion, Matalon & Metzener (1997) suggested the vorticity generation due to the flame front as the mechanism leading to the tulip flame. Other explanations based on the available experimental evidence and numerical results have also been proposed (Dunn-Rankin et al 1986;Gonzalez, Borghi & Saouab 1992, etc. ); however, the actual conditions for the appearance of the tulip flame are not yet completely understood (Bychkov et al 2007).…”

Section: Introductionmentioning

confidence: 90%

Three-dimensional simulations of premixed hydrogen/air flames in microtubes

et al. 2010

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The dynamics of fuel-lean (equivalence ratio φ = 0.5) premixed hydrogen/air atmospheric pressure flames are investigated in open cylindrical tubes with diameters of d = 1.0 and 1.5 mm using three-dimensional numerical simulations with detailed chemistry and transport. In both cases, the inflow velocity is varied over the range where the flames can be stabilized inside the computational domain. Three axisymmetric combustion modes are observed in the narrow tube: steady mild combustion, oscillatory ignition/extinction and steady flames as the inflow velocity is varied in the range 0.5 6 U IN 6 500 cm s −1 . In the wider tube, richer flame dynamics are observed in the form of steady mild combustion, oscillatory ignition/extinction, steady closed and open axisymmetric flames, steady non-axisymmetric flames and azimuthally spinning flames (0.5 6 U IN 6 600 cm s −1 ). Coexistence of the spinning and the axisymmetric modes is obtained over relatively wide ranges of U IN . Axisymmetric simulations are also performed in order to better understand the nature of the observed transitions in the wider tube. Fourier analysis during the transitions from the steady axisymmetric to the three-dimensional spinning mode and to the steady non-axisymmetric modes reveals that the m = 1 azimuthal mode plays a dominant role in the transitions.

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Section: Introductionmentioning

confidence: 90%

Three-dimensional simulations of premixed hydrogen/air flames in microtubes

et al. 2010

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“…The conclusion was also defied because many numerical results [8,14,16] showed that the formation of the tulip-shaped flame has nothing to do with viscosity. This viewpoint was supported by Dunn-Rankin et al [11,12] as well. One coincident conclusion once was drawn that the intrinsic DarrieusLandau instability of the flame is the reason for tulipshaped flame formation [3,[11][12][13][14]16].…”

Section: Introductionmentioning

confidence: 60%

“…This viewpoint was supported by Dunn-Rankin et al [11,12] as well. One coincident conclusion once was drawn that the intrinsic DarrieusLandau instability of the flame is the reason for tulipshaped flame formation [3,[11][12][13][14]16]. As was emphasized in [8], however, it is worth nothing that although all these authors stressed the fact that hydrodynamics is essential to understand the tulip-shape appearance, they disagreed on the mechanism to be put forward as the leading one.…”

Section: Introductionmentioning

confidence: 60%

“…Guenoche [9] once explained the formation of the tulip-shaped flame as a result of flamepressure wave interaction. These data, however, contradict the numerical results of Rotman and Oppenheim [10], Dunn-Rankin et al [11,12], Zoolinyan et al [13], and N'Konga et al [14], because they obtained the tulip-shaped flame with a low-Mach-number model as well. Rotman and Oppenheim [10] attributed the tulipshaped flame formation to the vortex motion of burned and unburned gases, and Marra and Continillo [15] also believed the tulip-shaped flame can be obtained by considering vortices only.…”

Section: Introductionmentioning

confidence: 76%

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Propagation and quenching of premixed flames in narrow channels

Song

Ding

et al. 2006

Combust Explos Shock Waves

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The shape and propagation of unsteady premixed flames in narrow channels with adiabatic and isothermal walls are numerically investigated in the present study. The flame chemistry is modelled by an one-step overall reaction, which simulates the reaction of a stoichiometric acetylene-air mixture. The numerical results show that both ignition methods and thermal boundary conditions affect flame formation and its shape. The flame keeps a single tulip shape in the whole process of propagating through the channel if plane ignition is used and a single mushroom shape if spark ignition is used. For isothermal cold walls, the flame cannot keep a single tulip shape or mushroom shape all the time. Under plane ignition, a transition from a tulipshaped flame to a mushroom-shaped flame occurs as flames propagate from one end of channel to the other. Under spark ignition, the process is just the contrary. It is also shown that the heat loss at the cold walls has a dual effect on the formation of a tulip-shaped flame. Flame propagation and quenching in narrow channels of different heights are analyzed systematically, and a criterion is proposed to judge the flame states of partial extinction and total extinction. It is called the criterion of flame propagation and quenching in narrow channels.

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“…The flame has a fixed position on the shear region where mixing occurs, having with a shape surrounding the IRZ and IDZ. As combustion is strongly affected by interaction with recirculation zones, [4,5] first step of the research is to model the mixing of the two confined coaxial jets.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic characterization of isothermal swirling flows in combustors

Parra-Santos

Vuorinen

Perez-Dominguez

et al. 2014

Int J Energy Environ Eng

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Swirl flame stabilization is widespread among burners' manufacturers, but the complex flow patterns are not yet fully understood. The interaction of two confined swirling jets leads to the formation of two recirculation zones being the flame located on the shear layer between the both zones. In such conditions, the lean mixtures can be burned producing low emissions. In the present study, flow structure and turbulent mixing of two isothermal coaxial jets are investigated using Large Eddy Simulation (LES). This is a challenging tool to achieve accuracy but it requests demanding spatial resolution and special treatment of results. By contrasting time-averaged radial profiles with experimental data of a classical benchmark, the model is validated. Results show that LES is able to reproduce the basic features of the flow pattern. Besides, the spectra analysis of instantaneous flow fields provides not only the energy decay but also the most energetic flow structures.

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Numerical and experimental study of “tulip” flame formation in a closed vessel

Cited by 98 publications

References 11 publications

Three-dimensional simulations of premixed hydrogen/air flames in microtubes

Three-dimensional simulations of premixed hydrogen/air flames in microtubes

Propagation and quenching of premixed flames in narrow channels

Aerodynamic characterization of isothermal swirling flows in combustors

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