The flow field of liquid steel in 260 mm x 300 mm casting mold with casting speed 0. 5 - 0. 8 m/min
submerged nozzle depth 90 ~ 120 mm and 5 kinds of nozzle structure has been studied by 1 :1 water model. Test results show that reasonable nozzle structure is available to decrease the impacting depth
present nozzle has larger impacting depth and the optimized nozzles may decrease the impacting depth by 30% - 40% ; with increasing casting speed the impacting depth increases while the immerged nozzle depth on impacting depth isn