单流中间包控流装置优化的水模型试验与应用

Water model test and application for optimizing flow control device of single-flow tundish

以相似原理为基础,建立1∶2.5水模型进行正交试验,并对试验结果进行极差分析与方差分析。结果表明,影响流场特征参数优化的主要因素是下挡墙高度和上挡墙-包底间距;提出最优控流装置组合:上挡墙-长水口间距为867 mm,上挡墙-包底间距为225 mm,上下挡墙间距为200 mm,下挡墙高度为350 mm;采用最优控流装置平均全氧质量分数下降16%,大颗粒夹杂物出现率降低57%。

Based on the similarity principle,a 1∶2.5 water model was established for orthogonal test,and the range analysis and variance analysis of the test results were carried out.The results showed that the main factors affecting the optimization of flow field characteristic parameters were the height of the lower retaining wall and the distance between the upper retaining wall and the bottom.The optimal combination of flow control devices was proposed,the distance between the upper retaining wall and the long nozzle was 867 mm,the distance between the upper retaining wall and the bottom was 225 mm,the distance between the upper and lower retaining walls was 200 mm,and the height of the lower retaining walls was 350 mm.The average total oxygen content and the occurrence rate of large inclusions were reduced by 16%and 57%respectively by using the optimal flow control device.