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Heat Transfer Correlations for Secondary Cooling in Continuous Casting
Author(s) -
Kotrbacek Petr,
Bellerova Hana,
Luks Tomas,
Raudensky Miroslav
Publication year - 2021
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.202000465
Subject(s) - nozzle , mist , heat transfer coefficient , materials science , leidenfrost effect , heat transfer , mechanics , boiling heat transfer , boiling , casting , water cooling , thermodynamics , continuous casting , intensity (physics) , nucleate boiling , composite material , physics , meteorology , optics
The general term “spray cooling” is for the research presented here limited to the spray cooling of hot surfaces with film boiling, starting at temperatures of about 1200 °C and finishing at the Leidenfrost point where cooling intensity changes rapidly. This is typical area of secondary cooling in continuous casting. Herein, a correlation for Heat Transfer Coefficient (HTC). The most frequently used parameter of water impingement density is in the presented correlation used together with impact pressure to get good results. This study uses both water and mist nozzles. It is shown and experimentally verified why equations based only on the water impingement density cannot provide sufficiently precise predictions of HTC.