Numerical and physical simulation research on the optimization of structure in seven-strand tundish with double-shroud nozzles
The optimization of the tundish with a seven-strand double-shroud nozzle has been carried out.An experimental model of a watermodel was created using a 1∶4 scale,and the experiment was also carried out.The experiment investigated the effects of deflection position and upward elevation angle on the flow field of the double-shroud nozzle.According to the analysis of the results of the watermodel experiment,the optimal flow control device was selected.Besides,using the commercial software ANSYS Fluent,the temperature field coupling calculation of the middle pack flow field before and after optimization was calculated.The results were verified with the water model.The findings state that the residence time increases from 127 s to 253 s after optimization;the percentage of dead zone decreases from 57.13%to 24.10%,and the standard deviation of residence decreases from 21.74 to 10.87;the maximum temperature difference of pouring temperature in the longitudinal section of pouring area decreases from 4.7 K to 1.2 K;the temperature differences of each nozzle decreases significantly,the consistency of each nozzle is increased,and the fluid flow is more uniform.
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