Flame propagation and combustion in some dust-air mixtures

Proust, Christophe

doi:10.1016/j.jlp.2005.06.026

Cited by 74 publications

(69 citation statements)

References 13 publications

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“…The flame propagation method generally uses open tubes or closed bombs. Opened tubes (Goroshin et al (1996), Han et al (2000), Proust (2006)) are filled with dust clouds generated for the most part by fluidized beds at the bottom of the tube or sometimes by a vibrating sieve placed at the top of the tube. In all cases, cloud generation conditions are chosen in order to reach a low level of residual turbulence.…”

Section: Introductionmentioning

confidence: 99%

MIE and flame velocity of partially oxidised aluminium dust

Bernard

Gillard

Foucher

et al. 2012

Journal of Loss Prevention in the Process Industries

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This work presents experimental tools for the determination of Minimum Ignition Energy (MIE) and results concerning the influence of an initial oxidation state on ignition threshold energies and flame velocity. These studies are carried out with micrometric aluminium particles which are oxidised using an anodising process. The first part of this work concerns the description of the experimental devices (Hartmann tube, for MIE measurements, and constant volume combustion chamber for flame velocity measurement with using high speed recording shadowgraphy). In the second part, a review of some results obtained for the sensitivity (MIE) of aluminium particle evolution versus particle diameter, air-fuel equivalence ratio and oxide content is presented. The effect of the oxide content is demonstrated: the MIE increases with the initial oxide content. The sensitivity of oxidised dust remains relatively high for high oxide contents (17.1wt%). The flame velocity is also modified and decreases as the oxide content increases. The most important result seems to be the role of the water content contained in the oxide shell which increases the reactivity of the oxidised aluminium dust.

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Section: Introductionmentioning

confidence: 99%

MIE and flame velocity of partially oxidised aluminium dust

Bernard

Gillard

Foucher

et al. 2012

Journal of Loss Prevention in the Process Industries

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“…To the present authors' knowledge, there is only indirect observation of the potential role of thermal radiation in the flame propagation process. Proust (Proust, 2006) demonstrated that it is possible to ignite Al dust-air clouds using a laser beam having the same intensity and wavelength than the theoretical radiated heat flux by the burning particles. Schevchuk (Schevchuk and al., 1983) relates that, observing the upward and downward Al dust-air flame propagation in a vertical tube, a surprising very fast flame acceleration was observed in the downward direction.…”

Section: Fig 2 T Inf T Ad and τ C From The Literature (Computatiomentioning

confidence: 99%

“…Experiments were done using the flame propagation tube (figure 5) already used in a number of studies (for instance Proust, 2006). The experimental chamber is a vertical tube (length 1.5 m and diameter 10 cm), filled with the dust cloud by the bottom thanks to a fluidized bed device.…”

Section: Infrastructurementioning

confidence: 99%

“…Dust explosions remain quite frequent in industrially developed countries despite significant progresses made during the last few decades not only about the understanding of the underlying explosion development processes (see for instance Eckhoff, 2003;Proust, 2006) but also in the mitigation techniques (Snoeys and al., 2010). A recent survey in France confirms that dust explosions concern all industrial fields because about 75% of the dusts manipulated are sufficiently combustible to explode (Janès and Chaineaux, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Thermal radiation in dust flame propagation

Christophe

Rim

Guessasma

et al. 2017

Journal of Loss Prevention in the Process Industries

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“…7. In experiments, to measure the explosivity of other types of dust particles and to calibrate dust explosion testing, lycopodium has been used as a reference dust since it has good dispersability and flowability (ISO 1985) [10]. Researchers have conducted many studies on organic dust combustion both experimentally [10,17,18] and analytically [16,19,20].…”

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A parametric study of lycopodium dust flame

Bidabadi

Dizaji

et al. 2015

J Eng Math

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Dust flames are associated with two-phase combustion phenomena where flame characteristics depend on interactions between solid and gas phases. Since organic dust particles can be effectively utilized in energy production systems, investigation of this phenomenon is essential. In this study, an analytical model is presented to simulate the combustion process of moist organic dust. The flame structure is divided into three zones: preheat zone, reaction zone, and postflame zone. To determine the effects of moisture content and volatile evaporation, the preheat zone is also divided into four subzones: first heating subzone and drying subzone, second heating subzone, and volatile evaporation subzone. The results obtained from the presented model are in reasonable agreement with experimental data for lycopodium particles. An increase in moisture content causes a reduction in burning velocity owing to moisture evaporation resistance. Consequently, the effects of some important parameters, like volatilization temperature, volatilization Damköhler number and drying Damköhler number are investigated. In special cases, like high moisture content, low volatilization temperature, and high drying resistance, the second heating subzone is omitted.

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Flame propagation and combustion in some dust-air mixtures

Cited by 74 publications

References 13 publications

MIE and flame velocity of partially oxidised aluminium dust

MIE and flame velocity of partially oxidised aluminium dust

Thermal radiation in dust flame propagation

A parametric study of lycopodium dust flame

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