吹氩流量对结晶器流场影响的插钉工业试验

 结晶器吹氩流量对流场分布有明显影响，因此明确吹氩流量对结晶器内流场分布的影响规律对提高铸坯质量有重要意义。通过插钉法工业试验研究了吹氩流量对结晶器内流场分布的影响，并且定量分析了液位波动的变化。结果表明，随着吹氩流量的增大，流场形态从双环流逐步转变为复杂流和单环流。结晶器内流场形态从双环流转变为复杂流和单环流的过程中，水口附近速度逐渐增大，液位逐渐升高，弯月面速度分布逐渐转变为从水口流向窄面，液位波动也相应增大。因此，生产过程中应选择合适的吹氩流量，避免产生复杂流和单环流，以提高铸坯质量。

Nail board industrial experiment on effect of argon #br# flow rate on mold flow field

The argon flow rate has a significant effect on the flow pattern distribution. Therefore, determining the influence of the argon flow rate on the flow pattern has an important influence on improving the quality of the slab. In the current study, the effects of the argon flow rate on the flow pattern distribution in the mold were studied using the nail board experiment, and the variation of the level fluctuation was quantitatively analyzed. The results showed that the flow pattern gradually changed from DRF to CRF and SRF with the increase of the argon flow rate. During the conversion of DRF into CRF and SRF, the velocity and surface level near the nozzle gradually increased. The meniscus velocity distribution gradually transformed into from the nozzle to the narrow face. The level fluctuations were also increased accordingly. Therefore, the appropriate argon flow rate should be selected to avoid the generation of CRF and SRF to improve the quality of the slab.