段禹奇, 郭磊, 张帅, 郭占成. 钢中不同形状夹杂物在超重力场中上浮模拟研究[J]. 工程科学学报. DOI: 10.13374/j.issn2095-9389.2023.06.16.002
引用本文: 段禹奇, 郭磊, 张帅, 郭占成. 钢中不同形状夹杂物在超重力场中上浮模拟研究[J]. 工程科学学报. DOI: 10.13374/j.issn2095-9389.2023.06.16.002
Numerical simulation study on the floating of inclusions of different shapes in steel in super-gravity field[J]. Chinese Journal of Engineering. DOI: 10.13374/j.issn2095-9389.2023.06.16.002
Citation: Numerical simulation study on the floating of inclusions of different shapes in steel in super-gravity field[J]. Chinese Journal of Engineering. DOI: 10.13374/j.issn2095-9389.2023.06.16.002

钢中不同形状夹杂物在超重力场中上浮模拟研究

Numerical simulation study on the floating of inclusions of different shapes in steel in super-gravity field

  • 摘要: 为研究夹杂物形状对其在钢液中的上浮行为的影响,本文使用流固耦合方法跟踪计算流体与固体界面状态,对三种具有不同形态比的夹杂物形状进行超重力场中的上浮行为模拟研究。结果表明,夹杂物的上浮速度与自身形状和上浮角度有关,形态比越趋近1或上浮角度越接近垂直,上浮速度越快。在G=1000的超重力场中,长度为1μm的夹杂物未发生旋转;长度为10、20μm的夹杂物会自初始角度(45°、90°)旋转至水平后稳定上浮。随着重力系数的降低,夹杂物的旋转速度逐渐降低,当G=50时,长度为20μm的夹杂物(初始角度90°)未能完全旋转;同时也证明相较于垂直角度,初始即倾斜的夹杂物更易发生旋转。最后,指出通过模型预估离心处理时间应以水平状态下夹杂物的上浮速度为准,并基于该结论给出了夹杂物上浮去除的大致时间。

     

    Abstract: In order to study the influence of the shape of inclusions on their floating behavior in the liquid steel, three shapes of inclusions with different aspect ratios were simulated in the super-gravity field using the fluid-solid coupling method to track the calculated fluid-solid interface state. The results show that the floating velocity of the inclusions is related to their own shape and floating angle, and the faster the floating speed is the closer the aspect ratio is to 1 or the floating angle is to vertical. In the supergravity field of G=1000, the inclusions with length of 1μm did not occur rotation; the inclusions with length of 10 and 20μm would rotate from the initial angle (45°, 90°) to horizontal and then float steadily. As the gravity coefficient decreases, the rotation speed of the inclusions gradually decreases, and when G=50, the inclusions with a length of 20μm (initial angle of 90°) fail to rotate completely; it also proves that the inclusions that are initially inclined are more likely to rotate compared to vertical angle.Finally, it is pointed out in this paper that the prediction of the supergravity treatment time using this model should be based on the floating velocity of the inclusions in the horizontal state, and the approximate time for the floating removal of the inclusions is given based on this conclusion.

     

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