相似比对中间包模拟试验的影响

doi:10.13228/j.boyuan.issn1005-4006.20210081

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摘要物理模拟试验和数值模拟是当前优化中间包流场和结构的主要手段,相似比的选取对于中间包模拟试验结果的准确性有较大影响。为了研究相似比对中间包模拟试验的影响,获得更能准确反映实际冶金反应器内流体流动行为的相似比,以80 t板坯连铸中间包为研究对象,采用经物理模拟验证后的Fluent模型模拟几何相似比分别为1∶1、1∶2、1∶4、1∶6、1∶8、1∶10的中间包内部流场流动行为,得到其速度和湍流动能的分布情况。结果表明,随着相似比减小,中间包内流场的平均速度整体呈减小趋势,湍动能无明显变化;相似比的改变对包内速度平缓变化的区域影响更加显著;当模型相似比小于1∶6时,与原型相比,模型速度的相对误差大于5%。因此,相似比的选用宜大于1∶6,以提高模拟的精度,准确还原实际流场。

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	李怡宏
	崔鑫
	何奕波
	郭文科

关键词 ：中间包, 相似比, 数值模拟, 速度场, 湍动能变化, 方差分析

Abstract：Physical simulation experiments and numerical simulations are currently the main methods for optimizing the flow field and structure of the tundish, and the selection of the similarity ratio has a greater impact on the accuracy of the simulation results of the tundish. In order to study the influence of the similarity ratio on the simulation test of the tundish, and to obtain a similarity ratio that more accurately reflects the fluid flow behavior in the actual metallurgical reactor, taking the 80 t slab continuous casting tundish as the research object, using the Fluent model verified by physical simulation to simulate the flow behavior of the flow field inside the tundish with geometric similarity ratios of 1∶1, 1∶2, 1∶4, 1∶6, 1∶8, 1∶10, and obtain the distribution of its velocity and turbulent kinetic energy. The results show that as the similarity ratio decreases, the average velocity of the flow field in the tundish shows a decreasing trend, while the turbulent kinetic energy does not change significantly; the change of the similarity ratio has a more significant impact on the area where the speed changes smoothly in the tundish; when the model similarity ratio is less than 1∶6, the relative error of the model speed is greater than 5% compared with the prototype. Therefore, the selection of the similarity ratio should be greater than 1∶6, it is helpful to improve the accuracy of simulation and accurately restore the actual flow field.

Key words： tundish similarity ratio numerical simulation velocity field turbulent kinetic energy change variance analysis

收稿日期: 2021-07-06

引用本文:

李怡宏, 崔鑫, 何奕波, 郭文科. 相似比对中间包模拟试验的影响[J]. 连铸, 2021, 40(5): 69-74. LI Yi-hong, CUI Xin, HE Yi-bo, GUO Wen-ke. Influence of similarity ratio on tundish simulation experiment. CONTINUOUS CASTING, 2021, 40(5): 69-74.

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http://www.chinamet.cn/Jweb_lz/CN/10.13228/j.boyuan.issn1005-4006.20210081 或 http://www.chinamet.cn/Jweb_lz/CN/Y2021/V40/I5/69

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