The Influence of the Shape of Turbulence Inhibitors on the Hydrodynamic Conditions Occuring in a Tundish

Abstract

The article presents results of the research that was carried out taking into account the influence of the (impact pads) turbulence inhibitor geometry and its equipment of the working space on the hydrodynamic conditions occurring in T-type tundish. Four different turbulence inhibitors were discussed. They differ in shape and configuration of external walls. The research was conducted basing on the numerical simulations as well as on tests performed on physical water model. As a result of calculations the velocity field distribution, turbulence field and marker concentration distribution in the liquid steel for the tested geometrical variants of turbulence inhibitors were obtained. Worked out RTD curves (Residence Time Distribution) allowed to determine the kinetics of steel mixing (the range of transient zone was estimated), and the percentage participation of the particular flow zones. The test carried out on the water model concerned one of the tested turbulence inhibitors. Research was done to verify the parameter settings of the numerical model applied in calculations.Obtained results gave valuable information about the work of the object after applying different turbulence inhibitors. Keywords: tundish, continuous casting, numerical modeling, Residence Time DistributionArtykuł przedstawia wyniki badań wpływu geometrii i sposobu zabudowy inhibitora turbulencji na warunki hydrodynamiczne panujące w przestrzeni roboczej kadzi pośredniej typu T. Rozpatrywano cztery warianty geometryczne inhibitora turbulencji. Inhibitory turbulencji różniły się kształtem i ukształtowaniem ścian wewnętrznych. Badania zrealizowano w oparciu o technikę modelowania numerycznego, oraz eksperyment na fizycznym modelu wodnym. W wyniku obliczeń uzyskano pola prędkości, turbulencji oraz rozkładu stężeń znacznika wprowadzonego do ciekłej stali w przestrzeni kadzi pośredniej dla rozpatrywanych wariantów geometrycznych inhibitora turbulencji. Opracowane charakterystyki RTD (Residence Time Distribution) umożliwiły określenie kinetyki mieszania stali (oszacowano zakres strefy przejściowej), oraz udziały procentowe poszczególnych stref przepływu. Badania uzupełniono o eksperyment na fizycznym modelu wodnym. Dotyczył on jednego z proponowanych wariantów inhibitora turbulencji. Wykonano je w celu weryfikacji doboru parametrów modelu numerycznego w przyjętych w obliczeniach.Uzyskane wyniki dostarczyły cennych informacji o pracy obiektu po zastosowaniu różnych inhibitorów turbulencji.

Modelling Methods of Magnetohydrodynamic Phenomena Occurring in a Channel of the Device Used to Wash Out the Spent Automotive Catalyst by a Liquid Metal

“…(8) are zero). This simplification can be accepted because metal is much lower than the electromagnetic field change rate [13,14].…”

Study of Flow Modification and Inclusion Removal in Slab Tundish Due to Bottom Gas Injection

“…Customarily, larger fractions of piston flow are associated with a better inclusion removal; dead volumes are linked to lower efficiency of volume utilization. Tripathi et al [2] suggested an improvement of the tundish operation by deploying a well-shaped bottom while Merder [3] stated the variations that can outcome from different impact pads geometry. Combining both scenarios Cwudzinski [4] displayed the flow pattern using physical and computational modeling.…”

“Vacuum Shroud (VS)”-A Green Flow Control Device (FCD) towards Replacement of “Turbo Stop” In Tundish Metallurgy

“…So it is not discussed in current study. Different shapes impact pads were studied but advanced pouring box as shown in Figure 2(f) have successfully replaced all developments of turbo stop which contain small holes at the wall of the impact pad [5,28]. But still now all these developments have certain limitations and uncertainty to make a stable flow within tundish.…”