連鑄電磁旋流水口流體流動和夾雜物行為

耿佃橋; 雷洪; 蘇志堅; 赫冀成; 孫琮琮

doi:10.13374/j.issn1001-053x.2012.05.015

連鑄電磁旋流水口流體流動和夾雜物行為

doi: 10.13374/j.issn1001-053x.2012.05.015

1. 東北大學材料電磁過程研究教育部重點實驗室, 沈陽 110819;
2. 總裝工程兵駐沈陽地區軍事代表室, 沈陽 110819

基金項目:

教育部留學回國人員科研啟動基金資助項目(20071108-2)

遼寧省博士啟動基金項目(20111009)

國家自然科學基金資助項目(51174058,51104047)

中央高校基本科研業務費資助項目(N100409007)

國家自然科學基金和上海寶鋼集團公司聯合資助項目(50834010)

國家高技術研究發展計劃資助項目(2009AA03Z530)

詳細信息

通訊作者:
耿佃橋,E-mail:gengdianqiao@epm.neu.edu.cn

中圖分類號: TF777.1
計量
- 文章訪問數: 214
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- PDF下載量: 8
- 被引次數: 0
出版歷程
- 收稿日期: 2011-04-21
- 網絡出版日期: 2021-07-30

Fluid flow and inclusion behavior in the nozzle with a rotating magnetic field during continuous casting

1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education of China), Northeastern University, Shenyang 110819, China;
2. Engineer Military Representative Office of the General Armaments Department in Shenyang Area, Shenyang 110819, China

摘要

摘要:
采用數值模擬方法對連鑄電磁旋流水口內流體流動和夾雜物碰撞長大行為進行了研究.數值結果表明電磁旋流水口出口處流體流動擴張角與低熔點合金實驗值相符.旋轉磁場對浸入式水口內壁夾雜物沉積行為存在兩個相反的作用:一方面旋轉磁場作用加強了水口壁面處鋼液的湍流流動,加速了夾雜物在水口內壁的沉積吸附速率;另一方面水口內壁附近夾雜物在旋轉磁場產生的旋流作用下易被攜帶至水口中心,削弱了水口內壁對夾雜物的黏附.在上述兩方面因素作用下,鋼液區存在一個最佳磁感應強度可使水口內壁夾雜物沉積速率降至最低,從而減輕水口結瘤現象.
- 連鑄 /
- 磁場 /
- 旋流 /
- 水口 /
- 夾雜物 /
- 數值分析
Abstract:
A numerical simulation method was applied to investigate the fluid flow as well as the inclusion collision and growth behavior in a swirling flow nozzle induced by a rotating magnetic field during continuous casting.Numerical results indicate that the divergent angle at the submerged entry nozzle(SEN) outlet agrees well with the experimental values of low melting point alloys.The rotating magnetic field has positive and negative effects on the deposition rate of inclusions on the SEN sidewall.On one hand,the turbulence flow near the SEN sidewall enhanced by the rotating magnetic field increases the deposition rate of inclusions on the sidewall;on the other hand,inclusions near the SEN sidewall have a tendency to move towards the SEN center under the rotating magnetic field,which decreases the deposition rate of inclusions on the SEN sidewall.Due to these two paradoxical factors,there is an optimum magnetic induction intensity to minimize the deposition rate of inclusions on the SEN sidewall and the clogging phenomenon can be weakened.
- continuous casting /
- magnetic fields /
- swirling flow /
- nozzles /
- inclusions /
- numerical analysis