Design Optimization of a Single-Strand Tundish Based on CFD-Taguchi-Grey Relational Analysis Combined Method

Sheng, Dong-Yuan

doi:10.3390/met10111539

Cited by 20 publications

(12 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a design criterion, the optimal tundish would rather have a big plug flow volume fraction and a small dead volume fraction [ 41 ]. As listed in Table 5 , the plug flow volume fraction is bigger for both cases (Case B1, 25%; Case B2, 28%) compared to the results in Table 4 (Case A1, 14%; Case A2, 17%) which is the configuration without turbulence inhibitor.…”

Section: Resultsmentioning

confidence: 99%

Effect of Thermal Buoyancy on Fluid Flow and Residence-Time Distribution in a Single-Strand Tundish

Sheng

Jönsson

2021

Materials

Self Cite

View full text Add to dashboard Cite

Natural convection of molten steel flow in a tundish occurs due to the temperature variation of the inlet stream and heat losses through top surface and refractory walls. A computational fluid dynamics (CFD) model was applied to study the effect of thermal buoyancy on fluid flow and residence-time distribution in a single-strand tundish. The CFD model was first validated with the experimental data from a non-isothermal water model and then applied to both scale-down model and prototype. The effects of flow control devices, including weir, dam and turbulence inhibitor, were compared and analyzed. Parameter studies of different heat losses through the top surface were performed. The results show that thermal buoyancy has a significant impact on the flow pattern and temperature distributions of molten steel in the tundish. The increase of heat loss through the top surface shortens the mean residence time of molten steel in the tundish, leading to an increase in dead volume fraction and a decrease in plug flow volume fraction.

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of Thermal Buoyancy on Fluid Flow and Residence-Time Distribution in a Single-Strand Tundish

Sheng

Jönsson

2021

Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, the proper design and the optimized operation for a tundish are crucial for final product quality. [ 1,2 ] The research scope of tundish metallurgy covers fluid flow, [ 3,4 ] heat transfer, [ 5,6 ] particle behavior, [ 7–9 ] etc. There is no doubt that the molten metal flow behavior is the basis of all the tundish performance.…”

Section: Introductionmentioning

confidence: 99%

Challenge of Residence Time Distribution Curve in Tundish for Continuous Casting of Steel

Ding

Lei

Chen

et al. 2022

steel research int.

View full text Add to dashboard Cite

The residence time distribution (RTD) curve is a simple and useful method to analyze the flow behavior in the tundish. In the last decades, analysis result acquirement based on the RTD curve has been applied to design and optimize the flow control devices in a simple bare tundish or a multistrand tundish. There are many factors to affect the acquirement and analysis of the RTD curve, such as the tracer, the measuring technology, and the analysis model. In order to find a solution for the above issues, the latest progress and research status of RTD curve are discussed in the fields of water model, mathematical model, RTD analysis model, and measuring technology. After comparison, the KCl solution is a good tracer, and its tracer concentration and volume can be determined by the dimensionless tracer parameter (Dtp). The extended combined model can be applied to analyze the RTD curve by pulse input of tracer, and the mean residence time is the key parameter to identify the difference in fluid characteristics among the strands.

show abstract

“…Two responses are typically applied, namely (i) inclusion remove rate, (ii) dead volume 2 of 23 fraction. The proper implementation of flow control devices (FCD) in the tundish ensures the increase of inclusion removal rate and the decrease of dead volume fraction [9,10].…”

Section: Introductionmentioning

confidence: 99%

Application of Tanks-in-Series Model to Characterize Non-Ideal Flow Regimes in Continuous Casting Tundish

Sheng

Zong-shu

2021

Metals

Self Cite

View full text Add to dashboard Cite

This study describes a new tanks-in-series model for analyzing non-ideal flow regimes in a single-strand tundish. The tundish was divided into two interconnected tanks, namely an inlet tank and an outlet tank. A water model experiment was carried out to separately measure the residence-time distribution (RTD) of the two tanks. Drift beads were adopted in the water model experiment to simulate the non-metallic inclusions in molten steel. Dead volume fraction was evaluated by analyzing measured RTD curves. The ratio between mixed flow volume and plug flow volume was proposed as a new criterion to evaluate the inclusion removal. In the inlet tank, a higher mixed flow fraction was preferred to effectively release turbulent kinetic energy and enhance inclusion collision growth. In the outlet tank, a higher plug flow fraction was preferred to facilitate inclusion removal by flotation. The optimal positions of the weir were recommended based on the RTD analysis and the inclusion removal from the results of water model experiments. A theoretical equation was derived based on the tanks-in-series model, providing a good fitting function to analyze the experimental data. The confirmation test was performed by applying computational fluid dynamics simulations of liquid steel flow in the real tundish.

show abstract

Design Optimization of a Single-Strand Tundish Based on CFD-Taguchi-Grey Relational Analysis Combined Method

Cited by 20 publications

References 29 publications

Effect of Thermal Buoyancy on Fluid Flow and Residence-Time Distribution in a Single-Strand Tundish

Effect of Thermal Buoyancy on Fluid Flow and Residence-Time Distribution in a Single-Strand Tundish

Challenge of Residence Time Distribution Curve in Tundish for Continuous Casting of Steel

Application of Tanks-in-Series Model to Characterize Non-Ideal Flow Regimes in Continuous Casting Tundish

Contact Info

Product

Resources

About