Self-Similar Propagation Law and Fractal Structure of the Surface of a Free Expanding Turbulent Spherical Flame

Gostintsev, Yu. A.; Фортов, В. Е.; Shatskikh, Yu. V.

doi:10.1023/b:dopc.0000035399.90845.db

Cited by 41 publications

(3 citation statements)

References 2 publications

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“…Gostintsev et al [3] evaluated the large-scale explosive experiments with various mixtures at atmospheric pressure undertaken by Lind and Whitson [15], and concluded that all mixtures exhibited an identical accelerate exponent value of 1.5. More notably, the initial stated value of α was reduced to 1.25-1.5 in the subsequent studies [16,17], and the updated evaluation indicated that the value of 1.5 was only obtained in a few situations. Kwon et al [18] investigated H 2 /O 2 /N 2 flames in a constant high-pressure dual-chamber vessel at a pressure of up to 1.5 MPa.…”

Section: Introductionmentioning

confidence: 99%

Self-Acceleration and Global Pulsation of Unstable Laminar Hydrogen-Air Flames

Xie

Morsy

Yang

2023

Preprint

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Section: Introductionmentioning

confidence: 99%

Self-Acceleration and Global Pulsation of Unstable Laminar Hydrogen-Air Flames

Xie

Morsy

Yang

2023

Preprint

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“…This cut-off wavelength is also supposed to be the scaling length that controls the velocity of weakly turbulent flames [3] or of a self-turbulent flame with a fractal structure [7]. This length can be evaluated by direct measurements [6] or from the knowledge of the stability limits of planar premixed flames [8,9], but with a lot of uncertainties.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Flame Instabilities in a Hele-Shaw Burner

Sarraf

Almarcha

Quinard

et al. 2018

Flow Turbulence Combust

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We show in this paper that a Hele-Shaw burner can be used for studying the development of premixed flame instabilities in a quasi-two dimensional configuration. It is possible to ignite a plane flame at the top of the cell, and to measure quantitatively the growth rates of the instability by image analysis. Experiments are performed with propane and methane-air mixtures. It is found that the most unstable wavelength, and the maximum linear growth rate of perturbations, directly measured in the present experiments, have the same order of magnitude as those previously measured on flames propagating freely downwards in wide tubes.

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“…However, flame simulations based on the flame-tracking technique as well as Sivashinsky-Kuramoto equation do show significant acceleration of propagating 2-D flame [19]. Further development of an unstable growing laminar flame may lead to its transition to a turbulent regime or even a detonation [20][21][22][23].…”

mentioning

confidence: 99%

Turbulent Combustion of Hydrogen–CO Mixtures

Burluka

Hussin

Sheppard

et al. 2011

Flow Turbulence Combust

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Laminar and turbulent burning velocities were measured in a closedvolume fan-stirred vessel for H 2 -CO mixtures using two independent methods of flame definition. It has been shown that the unsteady flame development is an important factor and it needs to be taken into account for comparison of the burning rates obtained in different experiments. For the atmospheric pressure flames, the mixtures with faster laminar flame velocities burnt faster in turbulent flow despite the fact that the lean flames exhibit cellular structures. However, even a modest increase of the initial pressure promotes strongly cellularity and causes a significant acceleration of a lean laminar flame. The same lean flame burns faster in turbulent flow as well and this increase in the rate of combustion is greater that can be deduced from variation of the molecular heat diffusivity and laminar flame speed.

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Self-Similar Propagation Law and Fractal Structure of the Surface of a Free Expanding Turbulent Spherical Flame

Cited by 41 publications

References 2 publications

Self-Acceleration and Global Pulsation of Unstable Laminar Hydrogen-Air Flames

Self-Acceleration and Global Pulsation of Unstable Laminar Hydrogen-Air Flames

Quantitative Analysis of Flame Instabilities in a Hele-Shaw Burner

Turbulent Combustion of Hydrogen–CO Mixtures

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