水口側孔傾角對大方坯結晶器流場和液面波動的影響

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Effect of nozzle outlet angle on the fluid flow and level fluctuation in a bloom casting mould

1. Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Jianlong Iron and Steel Holding Company, Beijing 100070, China

摘要: 基于湍流模型與多相流模型的耦合,實現了對結晶器流動與自由液面波動行為的計算模擬.分析研究了不同側孔傾角對對稱多側孔水口澆注大方坯結晶器內流場及自由液面波動的影響規律.結果表明:水口側孔向下角度每增加5°,結晶器寬面和窄面沖擊點位置分別下降約13mm和10mm;一定浸入深度下,鋼水出口向下傾角的大小對大方坯結晶器液面波動影響不大,在3mm以內;結晶器壁面附近的鋼液較水口附近鋼液活躍.推薦水口側孔向下傾角為20°.
- 結晶器 /
- 大方坯 /
- 流場 /
- 液面波動
Abstract: Based on the coupled model of turbulence and multiphase fluid flow, the flow behavior with free surface fluctuation in a bloom casting mould was numerically simulated. The influence of nozzle outlet angle on the fluid flow and free surface oscillation in the mould was analyzed. The results show that when the downward nozzle outlet angle increase by 5°, the impinging spots descend by 13 mm and 10 mm at the wide faces and narrow faces respectively. At a given submergence depth of 100 mm, outlet angle show limited influence on the fluctuation within 3 mm. The fluid close to mould wall is more active than that close to nozzle. The nozzle outlet angle of 20° is recommended to use.
- mould /
- bloom /
- fluid flow /
- free surface fluctuation