NDLI: Analyse du développement de jets horizontaux ou inclinés dans des lits fluidisés par un gaz

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Analyse du développement de jets horizontaux ou inclinés dans des lits fluidisés par un gaz

Content Provider	Semantic Scholar
Author	Xuereb, Catherine
Copyright Year	1989
Abstract	Dans certains procedes mettant en œuvre la fluidisation de particules par un gaz, il est parfois necessaire de proceder a des injections laterales de gaz, voire de particules, dans la colonne. Dans ce cadre, nous etudions le phenomene de jets horizontaux ou inclines, en mode continu ou en mode intermittent, introduits dans differentes geometries de colonnes. Une technique de detection d'un jet chaud par cartographie thermique est mise au point. L'utilisation de methodes cinematographiques permet l'etude de la morphologie du jet. Les profils de ·vitesse du gaz dans le jet sont etablis d'apres les mesures effectuees avec un tube de Pitot. Enfin, nous proposons une modelisation simple de la partie d'expansion lineaire du jet, qui permet de predire les vitesses et les temperatures du gaz et des particules, ainsi que le taux de vide local. ABSTRACT : In some processes involving the fluidization of particles by a gas, sometimes it is useful to inject gas, and even particles, into the column, laterally. In this framework, horizontal or inclined jet phenomena are studied, in continuous process or batch mode, inside columns of different geometries. A detection technic of hot jets by thermal cartography is developped. The use of cinematographic methods enables to study the jet morphology. Gas velocity profiles inside the jet are established from measurements carried out with Pitot-tube probe. Finally, a simple modeling of the linear expansion part of the jet, which enables to predict gas and particles velocities and temperatures, as well as the local voidage, is proposed
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://oatao.univ-toulouse.fr/7258/1/xuereb.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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