应用二维激光测速仪和高速摄影机对带有渣层的金属熔池流场的水模型进行了试验研究。根据研究结果提出熔渣-金属界面处的流动边界条件,用涡量-流函数法求解了有渣金属熔池的湍流特征。结果表明,熔渣下金属熔池的流动速度、湍动能和循环流量均显著低于无渣金属熔池。除包底区外,顶部渣层下近包壁处也有一个湍动能很低的“死区”。
By use of the two-component LDA and high speed camera, the watermodel of the flow field in matal bath under molten slag has been tested. On the basis ofexperimental results, the flow boundary conditions of liquid metal at the slag-metalinterface of a gas injecting bath were deduced. The flow field and the turbulent pa-ramaters of the metal bath covered with slag were solved by the vorticity-streamfundion method. Results reveal that the flow velocity, turbulent energy and circulat-ing rate of the melt under slag are lower than that of without slag cover. Anotherone "dead zone" of the lowest turbulent energy is formed in the top layer underthe cover of slag near the ladle linnng.
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