• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ISIJ international >Numerical Study of Internal SEN Design Effects on Jet Oscillations in a Funnel Thin Slab Caster
【24h】

Numerical Study of Internal SEN Design Effects on Jet Oscillations in a Funnel Thin Slab Caster

机译：内部SEN设计对漏斗薄板坯连铸机射流振荡影响的数值研究

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The understanding of the jets oscillations inside the funnel thin slab mould is essential to ensure constant molten steel delivery, better flow patterns control and consequently increase the shop productivity and quality of the final product. To achieve this, a particular numerical study of the internal nozzle design effects on the mould fluidynamics is carried out trying to determinate the origin of the jets oscillations; for this, a mathematical model was developed including the fundamental equations, the RSM turbulence model and the VOF multiphase model. The governing equations are discretised and solved thought the implicit segregated-iterative method embedded in FLUENT~(?). The results show that even for SEN designs with stable operational behaviour, the jet oscillations remain present and became more intense for higher casting speeds and deeper immersions. The nozzle analysis shows that the internal geometry promotes flow perturbations at the zone where the internal transversal areas start changing, generating high and low dynamic pressures encouraging a tendency for the molten steel to leave in preference for one of the ports. In addition, a delicate micro-scale force balance was found on the internal bifurcation tip of the nozzle; this balance is related to the fluctuant velocities and the ferrostatic pressure. If this balance is broken the oscillations are more intense, promoting permanent variations of the mass flow rate from one port to the other. Consequently, it is concluded that the jets oscillations have their origin inside the SEN.
机译：了解漏斗薄板坯模具内部的射流振荡对于确保恒定的钢水输送，更好的流型控制并因此提高车间生产率和最终产品的质量至关重要。为此，对喷嘴内部设计对模具流体动力学的影响进行了专门的数值研究，试图确定射流振荡的起因。为此，开发了一个数学模型，其中包括基本方程，RSM湍流模型和VOF多相模型。通过嵌入在FLUENT〜（？）中的隐式隔离迭代方法离散化和求解控制方程。结果表明，即使对于具有稳定运行性能的SEN设计，射流振荡仍然存在，并且对于更高的铸造速度和更深的浸入会变得更加强烈。喷嘴分析表明，内部几何形状促进了内部横向区域开始变化的区域处的流动扰动，产生了高和低的动压力，从而促使钢水倾向于优先离开其中一个端口。此外，在喷嘴的内部分叉尖端上发现了微妙的微尺度力平衡。这种平衡与波动速度和亚铁静压力有关。如果这种平衡被打破，振荡将更加剧烈，从而导致质量流量从一个端口到另一个端口的永久性变化。因此，得出的结论是，射流振荡的起因是SEN内部。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号