Behavior of flames propagating through lycopodium dust clouds in a vertical duct

Han, Ou Sup; Yashima, Masaaki; Matsuda, Toei; Matsui, Hidenori; Miyake, Atsumi; Ogawa, Terushige

doi:10.1016/s0950-4230(99)00072-8

Cited by 82 publications

(51 citation statements)

References 5 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 compare our results with the experimental data, some initial data (physical characteristics), such as r p , T vap , Ze, Le, and Da vap of the lycopodium particle, are essential. These parameters are obtained from previous works (T vap ≈ 180 • C, from a Derivative Thermogravimetry (DTG) analysis of a Thermogravimetry (TG) diagram, which Han measured for lycopodium dust particles [10], Ze ≈ 5.5 [16], and Le = 1 [16]). As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Any solid material that can burn in the air will have the same behavior, with a violence and speed that increase with the degree of subdivision of the material. Any solid material have been recognized as a threat to humans and their property for the last 150 years [10].…”

mentioning

confidence: 99%

“…According to the preceding discussion, our analytical model is valid for ϕ u > 0. 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].…”

mentioning

confidence: 99%

“…A thermal gravity analysis (TGA) test was used by Han et al [10] to determine the combustive properties of lycopodium particles. They calculated the burning velocity, flame temperature, and flame length.…”

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confidence: 99%

See 2 more Smart Citations

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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Analytical Simulation of the Cloud Combustion of Corn Starch Microparticles

et al. 2019

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Knowledge of the fundamentals of dust combustion is necessary for designing safety technologies such as flame arrestors. The structure of flame propagation in a uniformly distributed cloud of volatile fuel particles was simulated. A model based on energy and mass conservation laws was generated. The obtained system of equations was nondimensionalized and solved according to the introduced boundary conditions. Comparison of the results with the existing experimental data in the literature showed remarkable agreement. Finally, the effect of parameters such as particle size and Lewis number on the characteristics of the cloud combustion of biomass microparticles under both lean and rich conditions was studied.

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Behavior of flames propagating through lycopodium dust clouds in a vertical duct

Cited by 82 publications

References 5 publications

MIE and flame velocity of partially oxidised aluminium dust

MIE and flame velocity of partially oxidised aluminium dust

A parametric study of lycopodium dust flame

Analytical Simulation of the Cloud Combustion of Corn Starch Microparticles

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