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ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

INTERACTION BETWEEN THE FLOW CONDITIONS AND TEMPERATURE DISTRIBUTION IN THE CONTINUOUS SLAB CASTER MOLD

Get access (open in a dialog) DOI: 10.1615/IHTC13.p13.10
12 pages

要約

The control of the steel flow in the mould and the attenuation of the meniscus fluctuation are of decisive importance for the product quality of the continuous casting process.
Simultaneously measurements of both, unsteady flow condition using laser Doppler anemometry and meniscus fluctuation using conductivity sensors were carried out in a 1:2 physical water model of a continuous-casting mould.
The three dimensional fluid pattern were investigated depending on the adjusted process parameters (slab width, depth of the submerged entry nozzle, casting rate). To analyze the three dimensional spreading of the turbulent free jet in the mould, the turbulent flow conditions in the mould were measured in the middle plane where the turbulent free jet exits the outlet of the submerged entry nozzle as well as in the plane between the nozzle and the broad side of the mould. Based on these measurements in the upper part of the mould the melt was classified into 5 sub-regions with characteristic flow conditions. The experimental results indicate a linear correlation between the amplitude of the meniscus disturbance and adjusted Froude number. Furthermore it can be concluded that the meniscus movement consists of multitude superposed single oscillations with different frequencies and amplitudes. The measured frequency ranges in the water model correlates with the measured frequency ranges in the original hot model during the industrial casting process.
The results of the measured flow conditions were implemented as boundary condition data into the commercial computational fluid dynamic solver of Fluent. The two equation k-ε model is used to model the turbulence condition in the mould. The distribution of the temperature field in the mould is shown under the consideration of the solidification process.