Titre :
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The effect of boundary-layer turbulence on mixing in heated jets
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Titre original:
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Effet de la turbulence de la couche limite sur le mélange dans les jets chauffés
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Auteurs :
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P. Strykowski ;
S. Russ
|
Type de document :
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article/chapitre/communication
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Année de publication :
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1992
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Format :
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865-868
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Langues:
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= Anglais
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Catégories :
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PHYSIQUE ETAT DE LA MATIERE
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Mots-clés:
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JET
;
CHAUFFAGE
;
ECOULEMENT TURBULENT
;
MELANGE
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Résumé :
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The mixing properties of a heated axisymmetric jet at a density ratio of 0.55 were examined for initially laminar and turbulent separated boundary layers. Initially laminar jets displayed large intermittent spread rates with half-angles up to 45° and a corresponding rapid decay of the streamwise velocity and temperature on the jet axis. When the boundary layer was disturbed upstream of the nozzle exit, creating an initially turbulent separed layer the jet mixing was significantly reduced.
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Source :
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Phys. fluids A 4, vol n°5
|