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	薄板坯连铸工艺因素对结晶器非稳定流场特征参数的影响
	沈丙振 ; 沈厚发 ; SHEN Bingzhen ; SHEN Houfa
	2010-05-13 ; 2010-05-13
关键词	薄板坯连铸 结晶器 水力学模拟 流场 液面波动 continuous thin slab casting mould water modeling fluid flow level fluctuation TF777.7
其他题名	Influence of process factors on the characteristic parameters of unstable fluid flow in a continuous thin slab casting mould
中文摘要	利用波高仪和粒子示踪法在1∶1的水力学模型中研究了薄板坯连铸工艺参数对结晶器内非稳定流场特征参数的影响.结果表明:流场特征参数随时间变化具有一定的周期性.随着拉坯速度增加,平均射流撞击位置下降,平均回流区中心深度下降,平均波高增加;同时,撞击点、回流区中心深度和波高的变化范围增大,周期减小,结晶器内流动不稳定程度增大.随着水口浸入深度增加,平均射流撞击位置下降,平均回流区中心深度下降,平均波高减小;同时,撞击点、回流区中心深度和波高的变化范围减小,周期增加,流场不稳定程度减小.随着水口出口角度增加,平均射流撞击位置下降,平均回流区中心深度下降,平均波高减小;对于较大的水口出口角,尽管结晶器内流场非稳定流动范围较大,但是流场的运动周期较大,液面波动的非稳定程度却较小.; Experiments of a real aspect water model were conducted to study the influence of process factors on the characteristic parameters of unstable fluid flow in a continuous thin slab casting mould by using a wave gauge and the particle trajectory visualization method.The results show that the characteristic parameters of fluid flow vary with a certain periodicity.With increasing casting speed,the average jet impinging position and the average circumfluence center descend and the average wave height increases;moreover,the variation ranges of the jet impinging position,the circumfluence center and the wave height increase,the variation period decreases and the fluid flow becomes more unsteady.With increasing immersion depth of the submerged entry nozzle(SEN),the average jet impinging position and the average circumfluence center descend and the average wave height decreases;in addition,the variation ranges of the jet impinging position,the circumfluence center and the wave height decrease,the variation period increases and the turbulent flow becomes gradually calmness.With increasing SEN outlet angle downwards,the average jet impinging position and the average circumfluence center descend and the average wave height decreases;for a larger SEN outlet angel,even though the characteristic fluid flow moving range is larger,the variation period is greater and the level fluctuation becomes relatively stable.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/30837]
专题	清华大学
推荐引用方式 GB/T 7714	沈丙振,沈厚发,SHEN Bingzhen,等. 薄板坯连铸工艺因素对结晶器非稳定流场特征参数的影响[J],2010, 2010.
APA	沈丙振,沈厚发,SHEN Bingzhen,&SHEN Houfa.(2010).薄板坯连铸工艺因素对结晶器非稳定流场特征参数的影响..
MLA	沈丙振,et al."薄板坯连铸工艺因素对结晶器非稳定流场特征参数的影响".(2010).

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