The principle and method to measure directly the main flow velocity of liquid steel ina 60 tons argon-stirred ladle by a probe(an immersed body)were introduced in the paper.

• 本文介绍利用紊流下形阻系数近于常数的条件，对60t吹氩钢包内的主流股流速进行实际测量的原理、方法和结果。