Determination of Dust-Dispersion-lnduced Turbulence and its Influence on Dust Explosions

Zhen, Guangping; Leuckel, Wolfgang

doi:10.1080/00102209608935518

Cited by 25 publications

(13 citation statements)

References 4 publications

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“…21 Turbulence measurements were performed by means of hot wire anemometry 17,18,21 or laser doppler anemometry. 19,20 Collected data allowed the evaluation of the temporal values of the instantaneous velocity and of the root mean square velocity fluctuations in few points of the vessel, mainly positioned at the center.…”

Section: C 2013 American Institute Of Chemical Engineersmentioning

confidence: 99%

CFD simulations of turbulent fluid flow and dust dispersion in the 20 liter explosion vessel

et al. 2013

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A CFD model was developed with the aim at simulating the turbulent flow field induced by dust feeding and dispersion within the 20 L bomb, and the associated effects on the distribution of dust concentration. The model was validated considering a set of data (pressure time histories and root mean square velocity) available in the literature. The time sequences of velocity vector and kinetic energy maps have shown that multiple turbulent vortex structures are established within the sphere. These vortices generate dead volumes for the dust which is pushed toward the walls of the sphere. The obtained results are relevant to the practice of dust explosion testing and the interpretation of test results and, then, they should be taken as reference to improve the conditions for standard tests. �� 2013 American Institute of Chemical Engineers

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Section: C 2013 American Institute Of Chemical Engineersmentioning

confidence: 99%

CFD simulations of turbulent fluid flow and dust dispersion in the 20 liter explosion vessel

et al. 2013

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“…A etapa de manuseio pode promover o atrito entre os grãos e desagrega-los em partículas com diâmetros menores como poeira de grãos. Esta característica pode favorecer a formação de nuvens de poeira e também facilitar o início de um processo de combustão devido ao aumento da área de superfície das partículas [8,9]. Como citado anteriormente, dentre os riscos de incêndios e explosões, um pode desencadear o outro.…”

Section: Riscos Associado Com O Armazenamento De Grãosunclassified

Gerenciamento dos riscos durante o armazenamento de materiais agrícolas em silos

Palacio¹,

Ibarra²,

Silva³

et al. 2018

Gestão E Gerenciamento

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“…The behaviors of both starch and MCC have been successfully modeled, with an average deviation of 5% for the maximum explosion pressure for instance. However, it should be emphasized that the model must be improved by taking into account the turbulence/combustion interactions, using empiric relationships such as those described in refs − . Another possibility will be to use the simulation of such nonstationary turbulent combustion processes, thanks to large eddy simulation, for instance. , This model will then be extended to hybrid mixtures.…”

Section: Development Of a Predictive Modelmentioning

confidence: 99%

Comparing Pyrolysis Gases and Dusts Explosivities: A Clue to Understanding Hybrid Mixtures Explosions?

Dufaud

Poupeau

Khalili

et al. 2011

Ind. Eng. Chem. Res.

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International audienceDuring the explosion of an organic dust cloud, the following steps are usually encountered: particle heating; its devolatilization/pyrolysis; and, then, a homogeneous combustion of the pyrolysis gases. In order to highlight the influence of the pyrolysis step in such explosions, experiments have been carried out on wheat starch powders and their pyrolysis gases. The maximum rate of pressure rise of the gases reaches 2830 bar s(-1) whereas it remains lower than 400 bar s(-1) for the starch at the same fuel equivalence ratio. Such a difference can be explained by the predominance of the pyrolysis step, but also, to a lesser extent, by changes in the initial turbulence level of the suspension. A model based on the flash pyrolysis mechanisms of cellulosic compounds and their combustion has been developed to represent the evolution of the explosion pressure of such powders. Applications to the case of gas/dust hybrid mixtures are also discussed

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Determination of Dust-Dispersion-lnduced Turbulence and its Influence on Dust Explosions

Cited by 25 publications

References 4 publications

CFD simulations of turbulent fluid flow and dust dispersion in the 20 liter explosion vessel

CFD simulations of turbulent fluid flow and dust dispersion in the 20 liter explosion vessel

Gerenciamento dos riscos durante o armazenamento de materiais agrícolas em silos

Comparing Pyrolysis Gases and Dusts Explosivities: A Clue to Understanding Hybrid Mixtures Explosions?

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