【摘要】 对连铸中间包内钢液流动现象进行了水模拟研究和速度分布测量。研究表明,注入的钢流下降时吸收周围液体,形成扩张角10°～12°的射流,是中间包内流动的动量源。挡墙设置能改变钢液流动方向,是控制钢液流动的有效手段。对不同类型的挡墙设置方案。用示踪剂分布方法测量了流动特点及夹杂物的去除率,探讨了合理的挡墙设置位置。更多还原

【Abstract】 The fluid flow phenomena in the bath of a rectangular tundish are studied in a water model, based on the dimensionless Fr and Re similarity criteria. The velocity vectors distribution diagrams are measured with LDA under two work conditions, which one is a bath with dam and weir and another is dam-free. The momentum source of flow motion in the bath of tundish is the downward stream. The velocity of liquid stream is recorded by a high speed camera. The stream injects the surrounding liquid and forms a liquid-liquid jet with spread angle 10°~12°. The jet strikes the bottom of the tundish and then becomes the spread out flow. The dam can cut off the bottom flow and converts the flow route. The residence time distribution curves of the flow in two tundishes with different work conditions are measured. The flow distances are changed, so the separation efficiency of particles from liquid is also changed owing to arrangement of different dams and weirs. A higher dam or two dams are more effective for delay the bottom flow. The optimum arrangement of dam and weir is discussed.更多还原