With using 1： 3 water model test the study on flow field of molten steel in an 80 t tundish with different flow control structure for eight strand 150 mm x 150 mm billet casting at steel works has been carried out and is verified by numerical simulation method. Study results show that the improvement of flow effect of molten steel in tundish is not obvious by only adding turbulence inhibitor

but adding "V" type baffle in tundish can obviously improve the flow characteristics of each stand

and the combination of turbulence inhibitor" type baffle and single dam can further improve the uniformity of flow characteristic of each strand and the average residence time increases to 505. 22 s

in the meanwhile the obvious circulation areas are formed at both sides of the dam. As the single dam is modified to double clam the average V

p

/V

d

increases to 2.

38 from original 1. 77

the average proportion of dead zone also reduces by 6. 0% while the stability at each nozzle and the coincidence of residence time distribution curves of each strand is best

and there are 3 big circulation areas and a small circulation area. The results of water model test coincide with the results of numerical simulation.