Effect of submerged entry nozzle wall surface morphologies on boundary layer structure and alumina inclusions transport

During the Al-killed steel continuous casting process, the molten steel corrosion and the accumulation of alumina inclusion deposits affect the submerged entry nozzle (SEN) wall surface, including the surface morphologies of the smooth wall, porous refractory wall, and clogged wall. The SEN wall sur...

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Published in工程科学学报 Vol. 43; no. 7; pp. 925 - 934
Main Authors Cheng-jian HUA, Min WANG, Meng-yun ZHANG, Rui-xuan ZHENG, Yan-ping BAO
Format Journal Article
LanguageChinese
Published Science Press 01.07.2021
Subjects
boundary layer
ejection events
inclusion transport
particle image velocimetry (piv)
submerged entry nozzle (sen) clogging
sweep events
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Summary:During the Al-killed steel continuous casting process, the molten steel corrosion and the accumulation of alumina inclusion deposits affect the submerged entry nozzle (SEN) wall surface, including the surface morphologies of the smooth wall, porous refractory wall, and clogged wall. The SEN wall surface morphology affects the boundary layer structure and alumina inclusions transport. In this study, a physical modeling method was adopted, and the surface morphologies simulation was realized by filling up the natural porous refractory material and inserting the real clog material in the polymethyl methacrylate SEN model. The velocity in the boundary layer was measured using the particle image velocimetry (PIV) technology, and the alumina inclusions transport path in the boundary layer was calculated by MATLAB software. The MATLAB codes combined the velocity data from the PIV measurement results and the inclusion transport equation. The four-quadrant analysis showed that sweep and ejection events existed in the
ISSN:2095-9389
DOI:10.13374/j.issn2095-9389.2020.05.05.001