Numerical Study on the Effect of a Novel Swirling Flow Generator for Submerged Entry Nozzle in Tundish
Numerical Study on the Effect of a Novel Swirling Flow Generator for Submerged Entry Nozzle in Tundish
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中间包浸入式水口新型旋流发生器效果的数值研究
DOI：
10.1002/srin.201900578
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发表时间：
2020-02
影响因子：
2.2
通讯作者：
Min Tan
中科院分区：
文献类型：
--
作者：
Jianchuan Yan;Tao Li;Shufeng Yang;Zhiqiang Shang;Min Tan
研究发现，浸入式水口（SEN）内的旋流能显著改善结晶器内的流态，从而提高产品质量。然而，迄今为止设计的产生旋流的装置由于成本、寿命、外部设备等原因而大多局限于在工业中应用，在此，新型旋流发生器（SFG）旨在安装在传统的连铸机中，以在钢水的重力势能驱动下在浸入式水口中产生旋流。通过计算流体动力学（CFD）模拟，比较了常规涡轮增压器中的流态，研究了SFG的影响。结果表明，在浸入式水口内产生了旋流，但不会对水口内的流场产生严重扰动。采用SFG后，SEN内的流动变得更加均匀，并且随着距离中间包底部的距离增加，旋流速度减小。提出了一个定量评价自旋流器内旋流强度的参数--旋流强度。
The swirling flow in the submerged entry nozzle (SEN) is found to significantly improve the flow pattern in the mold, as well as the quality of the steel products. However, the devices generating swirling flow designed so far are mostly limited to be applied in the industries due to the cost, lifetime, external facility, and so on. Herein, a novel swirling flow generator (SFG) is intended to be installed in the conventional tundish to generate a swirling flow in the SEN driven by the gravitational potential energy of the molten steel. The computational fluid dynamics (CFD) simulations are performed to investigate the effects of the SFG by comparing the flow pattern in the conventional tundish. The result shows that a swirling flow is produced in the SEN without bringing a serious disturbance to the flow distribution in the tundish. The flow in the SEN becomes much even by adopting the SFG and the swirling velocity is found to decrease with the increasing distance from the bottom of the tundish. A parameter called swirling intensity is proposed to quantitatively evaluate the intensity of the swirling in the SEN.
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