/
0/5

0 avis

Thermal radiation contribution to metal dust explosions


Type de document : Article de périodique
Langue : anglais

Responsabilité(s) :



Editeur : Elsevier
Année de publication : 2015


Domaine (s) :


Sujets :


Mots clés :

Indice LC : TH9446.D86
Indice Dewey : 604.7

Résumé anglais :

  • Despite the significant progress made towards the understanding of flame propagation mechanisms in dust-air mixtures, dust explosions still have a frequent occurrence and their danger presents a continuous threat to industries that produce, use and treat solid powders and dusts of combustible materials. In fact, many physical aspects are still needed to be clarified given the major difference existing between flame propagating in gaseous mixtures and in suspensions and many questions are still unanswered regarding the reasons behind the violence of fine metal dust explosions. Few experimental observations and theoretical considerations emphasized the potential role of radiation heat transfer in the behaviour of dust clouds' flames in which acceleration in flame propagation speed and instabilities were observed. Unfortunately, only few information is available, so far, concerning the capacity of radiative transfers of taking part in the propagation process. While investigating radiation phenomenon in dust clouds, we are faced with a complicated problem difficult to model analytically. The development of numerical approach, based on discrete element method (DEM), in order to treat this problem, seems more convenient. MULTICOR code, developed at the LTI, has already succeeded at modelling heat transfer in a bed of particles. Under this work, radiative heat transfer exchanged between particles in suspension is successfully calculated and we propose an original method of calculating heat transfers between dust and gas in the preheat zone of the flame. We are currently working on adapting the radiation models implemented to the case of fine particles and taking into consideration light scattered. With the purpose of determining the flame propagation speed and improving the knowledge of the phenomena involved, it would be possible to contribute to the development of suitable means of prevention and mitigation of dust explosion hazard.

Note : Extrait de : Procedia Engineering Volume 102, 2015, Pages 714-721
Note : Extrait de : Procedia Engineering Volume 102, 2015, Pages 714-721


Consulter en ligne

Suggestions

Du même auteur

Thermal radiation contribution to metal dust explosions  | Saleh, Khashayar

Thermal radiation contribution to metal dust explosions / Saleh, Khashayar - Fortin, Jérôme - Proust, Christophe - Guessasma, Mohamed - Ben Moussa, Rim - Elsevier, 2015

Despite the significant progress made towards the understanding of flame propagation mechanisms in dust-air mixtures, dust explosions still have a frequent occurrence and their danger presents a continuous threat to industries tha...

Source : Ressources électroniques

EXTR|EXTR

Physical mechanisms involved into the flame propagation process through aluminum dust-air clouds: A review | Ben Moussa, Rim

Physical mechanisms involved into the flame propagation process through aluminum dust-air clouds: A review / Ben Moussa, Rim - Proust, Christophe - Guessasma, Mohamed - Saleh, Khashayar - Fortin, Jérôme - Elsevier, 2017

In this paper, the combustion mechanisms of aluminum particles suspended in air and dust flame propagation mechanisms in dust-air mixtures, more specifically, in aluminum dust-air mixture are reviewed. Experimental data about indi...

Source : Ressources électroniques

EXTR|EXTR

Contribution to thermal radiation to dust flame propagation | Ben Moussa, Rim (19..-....). Auteur

Contribution to thermal radiation to dust flame propagation : application to aluminium dust explosions / Ben Moussa, Rim (19..-....). Auteur, 2017

Ces travaux de thèse sont consacrés à l examen du rôle du rayonnement thermique dans le processus de propagation des flammes issues de la combustion des particules d aluminium dans l air. Le sujet étant complexe et d un intérêt in...

Source : Ressources électroniques

THES|THES

Du même sujet

Thermal radiation contribution to metal dust explosions  | Saleh, Khashayar

Thermal radiation contribution to metal dust explosions / Saleh, Khashayar - Fortin, Jérôme - Proust, Christophe - Guessasma, Mohamed - Ben Moussa, Rim - Elsevier, 2015

Despite the significant progress made towards the understanding of flame propagation mechanisms in dust-air mixtures, dust explosions still have a frequent occurrence and their danger presents a continuous threat to industries tha...

Source : Ressources électroniques

EXTR|EXTR

Dust generation from powders: A characterization test based on stirred fluidization | Morgeneyer, Martin

Dust generation from powders: A characterization test based on stirred fluidization / Morgeneyer, Martin - Lefrançois, Emmanuel - Le Bihan, Olivier - Bouillard, Philippe - Saleh, Khashayar - Moufarej Abou Jaoude, Marie-Thérèse - Elsevier, 2014

The aim of this paper was to develop an experimental test based on combination of fluidization and stirring in the perspective of its use for dustiness assessment. A parametric study on various factors that influence the release o...

Source : Ressources électroniques

EXTR|EXTR

Essai d'estimation prédictive des limites d'inflammabilité des vapeurs organiques | Dalmazzone, Didier. Docteur

Essai d'estimation prédictive des limites d'inflammabilité des vapeurs organiques : exploitation de critères thermochimiques d'explosivité / Dalmazzone, Didier. Docteur - UTC, 1995

Des critères issus de grandeurs thermochimiques, déjà employés pour quantifier et prédire les dangers d'explosion, sont ici appliqués à l'évaluation du danger d'inflammation du mélange d'un combustible et d'un comburant. L'aptitud...

Source : Ressources électroniques

THES|THES

Chargement des enrichissements...

Avis des lecteurs