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Canadian Metallurgical Quarterly
The Canadian Journal of Metallurgy and Materials Science
Volume 48, 2009 - Issue 3
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Articles

Effect of Nozzle Configuration on Cooling of a Hot Moving Steel Plate

Pages 197-205 | Published online: 18 Jul 2013
 

Abstract

The objective of this study is to develop an experimental database for modelling boiling heat transfer that occurs during run-out table cooling. Experiments have been carried out on a pilot scale run-out table with an emphasis on the effect of nozzle configuration on the overall heat extraction rate. The heat extraction capability of an individual nozzle is generally determined by the surface temperature of the to-be-impinged and surrounding areas of the steel plate to be cooled. Nozzle arrangements of subsequent jet lines with respect to hot and cold regions developed by prior jet line impingement is crucial inmaintaining uniform and efficient cooling of the hot plate or strip. Results from a series of tests are presented and discussed to examine quantitatively heat extraction for a moving steel plate as a function of nozzle configuration.

The objective of this study is to develop an experimental database for modelling boiling heat transfer that occurs during run-out table cooling. Experiments have been carried out on a pilot scale run-out table with an emphasis on the effect of nozzle configuration on the overall heat extraction rate. The heat extraction capability of an individual nozzle is generally determined by the surface temperature of the to-be-impinged and surrounding areas of the steel plate to be cooled. Nozzle arrangements of subsequent jet lines with respect to hot and cold regions developed by prior jet line impingement is crucial inmaintaining uniform and efficient cooling of the hot plate or strip. Results from a series of tests are presented and discussed to examine quantitatively heat extraction for a moving steel plate as a function of nozzle configuration.

L'objectif de cette étude est de développer une banque de données expérimentales pour la modélisation du transfert de chaleur d'ébullition qui se produit lors du refroidissement de la table de sortie. On a effectué des expériences sur une table de sortie à l'échelle pilote avec une emphase sur l'effet de la configuration de la buse sur la vitesse globale d'extraction de chaleur. La capacité d'extraction de chaleur d'une buse individuelle est généralement déterminée par la température de surface des superficies d'impact de la tôle d'acier à refroidir et de leur environnement. L'arrangement des buses des lignes de jet subséquentes par rapport aux régions chaudes et froides développées par l'impact antécédent de la ligne de jet est cruciale dans le maintien d'un refroidissement uniforme et efficace de la tôle ou du feuillard chaud. On présente les résultats d'une série d'essais et l'on en discute afin d'examiner quantitativement l'extraction de chaleur d'une tôle d'acier en mouvement en fonction de la configuration de la buse.

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