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Title: Numerical study of steady turbulent flow through bifurcated nozzles in continuous casting

Abstract

Bifurcated nozzles are used in continuous casting of molten steel, where they influence the quality of the cast steel slabs. The present study performs two-dimensional (2-D) and three-dimensional (3-D) simulations of steady turbulent (K-{epsilon}) flow in bifurcated nozzles, using a finite-element (FIDAP) model, which has been verified previously with water model experiments. The effects of nozzle design and casting process operating variables on the jet characteristics exiting the nozzle are investigated. The nozzle design parameters studied include the shape, angle, height, width, and thickness of the ports and the bottom geometry. The process operating practices include inlet velocity profile and angle as well as port curvature caused by erosion or inclusion buildup. Results show that the jet angle is controlled mainly by the port angle but is steeper with larger port area and thinner walls. The degree of swirl is increased by larger or rounder ports. The effective port area, where there is no recirculation, is increased by smaller or curved ports. Flow asymmetry is more severe with skewed or angled inlet conditions or unequal port sizes. Turbulence levels in the jet are higher with higher casting speed and small ports.

Authors:
; ;  [1]
  1. Univ. of Illinois, Urbana, IL (United States). Dept. of Mechanical and Industrial Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
94383
Resource Type:
Journal Article
Journal Name:
Metallurgical Transactions, B
Additional Journal Information:
Journal Volume: 26; Journal Issue: 4; Other Information: PBD: Aug 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STEELS; CASTING; NOZZLES; TURBULENT FLOW; FLOW MODELS; TWO-DIMENSIONAL CALCULATIONS; THREE-DIMENSIONAL CALCULATIONS; VORTEX FLOW

Citation Formats

Najjar, F M, Thomas, B G, and Hershey, D E. Numerical study of steady turbulent flow through bifurcated nozzles in continuous casting. United States: N. p., 1995. Web. doi:10.1007/BF02651721.
Najjar, F M, Thomas, B G, & Hershey, D E. Numerical study of steady turbulent flow through bifurcated nozzles in continuous casting. United States. https://doi.org/10.1007/BF02651721
Najjar, F M, Thomas, B G, and Hershey, D E. 1995. "Numerical study of steady turbulent flow through bifurcated nozzles in continuous casting". United States. https://doi.org/10.1007/BF02651721.
@article{osti_94383,
title = {Numerical study of steady turbulent flow through bifurcated nozzles in continuous casting},
author = {Najjar, F M and Thomas, B G and Hershey, D E},
abstractNote = {Bifurcated nozzles are used in continuous casting of molten steel, where they influence the quality of the cast steel slabs. The present study performs two-dimensional (2-D) and three-dimensional (3-D) simulations of steady turbulent (K-{epsilon}) flow in bifurcated nozzles, using a finite-element (FIDAP) model, which has been verified previously with water model experiments. The effects of nozzle design and casting process operating variables on the jet characteristics exiting the nozzle are investigated. The nozzle design parameters studied include the shape, angle, height, width, and thickness of the ports and the bottom geometry. The process operating practices include inlet velocity profile and angle as well as port curvature caused by erosion or inclusion buildup. Results show that the jet angle is controlled mainly by the port angle but is steeper with larger port area and thinner walls. The degree of swirl is increased by larger or rounder ports. The effective port area, where there is no recirculation, is increased by smaller or curved ports. Flow asymmetry is more severe with skewed or angled inlet conditions or unequal port sizes. Turbulence levels in the jet are higher with higher casting speed and small ports.},
doi = {10.1007/BF02651721},
url = {https://www.osti.gov/biblio/94383}, journal = {Metallurgical Transactions, B},
number = 4,
volume = 26,
place = {United States},
year = {Tue Aug 01 00:00:00 EDT 1995},
month = {Tue Aug 01 00:00:00 EDT 1995}
}