摘要
以保护渣道动态压力作用模型为基础，利用Fluent软件对弯月面区域求解N—S方程，得到保护渣液渣的流动情况和弯月面的压力分布。计算结果表明：结晶器振动过程中，保护渣道的压力呈周期性变化。进入负滑脱期时，渣道入口处开始受正压力作用，当产生的正压力大于钢水静压力时，初始凝固坯壳开始被推离结晶器壁。正压越大，负滑脱时间越长，初始凝固坯壳被压的越弯，振痕就越深。并分析了振动参数、拉速、保护渣黏度等对振痕深度的影响。
The flow of mould flux and the pressure distribution in the meniscus area have been investigated by building the mould flux channel dynamic pressure model and using Fluent software to solve the N - S equation. The results showed that the mould flux channel pressure measures presented periodic change in the process of mould oscillation. When oscillation entered the negative strip time, the flux channel started to be under the positive pressure. When the positive pressure was stronger than the static pressure of liquid steel, the initial solidification shell was pushed out of the mould wall. The oscillation mark becomes deeper with the increases positive pressure and negative strip time that cause initial solidification shell being curved much. The effects of the oscillation Parameters, pulling speed, and the viscosity of mould flux on the depth of oscillation mark have also been discussed.
关键词
振痕
保护渣道
负滑脱时间
oscillation mark
mould flux channel
negative strip time
