Original scientific paper

Heat transfer during cooling of hot surfaces by water nozzles

M. Pøíhoda ; Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic
J. Molínek ; Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic
R. Pyszko ; Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic
M. Velička ; Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic
M. Vaculík ; Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic
J. Burda ; Faculty of Metallurgy and Materials Engineering, VŠB-TU Ostrava, Czech Republic

Abstract

Method of cooling in a secondary zone of continuous casting of steel has a significant influence on a quality of continuously cast products mainly from the point of view of internal and surface defects as well as zonal segregations. At the department of thermal engineering, a physical model of the secondary zone has been developed, which enables testing of both water and water-air nozzles. During laboratory measurements cooling effects of a cone nozzle have been expressed by means of three parameters. Most commonly used parameter is an admission characteristic, infrequently heat transfer coefficient is determined and newly a measuring of dynamic impact of the cooling water has been introduced.

Keywords

heat transfer coefficient; cooling of surface; nozzle; continuous casting of steel

Hrčak ID:

38687

URI

https://hrcak.srce.hr/38687

Publication date:

1.10.2009.

Article data in other languages: croatian

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