Experimental Analysis of the Influence of the Sliding-Gate Valve on Submerged Entry Nozzle Outlet Jets

IF 1.8 Q3 MECHANICS
Fluids Pub Date : 2024-01-20 DOI:10.3390/fluids9010030
J. González-Trejo, R. Miranda-Tello, Ruslan Gabbasov, C. A. Real-Ramírez, F. Cervantes-De-La-Torre
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引用次数: 0

Abstract

This work studies how the sliding-gate valve (SGV) modifies the features and the dynamic behavior of the outlet jets for flat-bottom and well-bottom bifurcated submerged entry nozzles (SENs) used in continuous casting machines. Three conditions for the SGV were studied: no obstruction, moderate obstruction, and severe obstruction. The experimental study used a scaled model, employing cold water as the working fluid. A high-frequency analysis of the flow inside the SEN’s bore arriving at the outlet ports was performed by employing the particle image velocimetry (PIV) technique. Low-frequency measurements of the volumetric flow at the exit port were obtained by splitting the exit jet into four quadrants and employing digital flowmeters. It was observed that reducing the SGV clearance increases the turbulence of the flow inside the SEN bore, but the flow displays ordered rather than erratic fluctuations. Flowmeter measurements showed that, regardless of the level of obstruction in the SGV, the outlet jets on flat-bottom and the well-bottom SENs have dynamic behaviors and features with significant differences. This finding is relevant because the flow distribution inside the outlet ports is directly related to the jet’s wideness, affecting the recirculation pattern inside the mold and, therefore, the quality of the finished steel slab.
滑动闸阀对浸没式喷嘴出口射流影响的实验分析
这项工作研究了滑动闸阀(SGV)如何改变连铸机中使用的平底和井底分叉浸没式入口喷嘴(SEN)的出口喷流特征和动态行为。研究了 SGV 的三种情况:无阻塞、中等阻塞和严重阻塞。实验研究使用了一个缩放模型,以冷水作为工作流体。利用粒子图像测速仪(PIV)技术对到达出口端口的 SEN 内孔流动情况进行了高频分析。通过将出口射流分成四个象限并使用数字流量计,对出口端口的体积流量进行了低频测量。测量结果表明,减小 SGV 间隙会增加 SEN 孔内的湍流,但湍流是有序的,而不是无规律的波动。流量计测量结果表明,无论 SGV 的阻塞程度如何,平底和井底 SEN 的出口喷流都具有显著差异的动态行为和特征。这一发现很有意义,因为出口端口内的流量分布与喷流的宽窄直接相关,会影响模具内的再循环模式,从而影响成品钢坯的质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Fluids
Fluids Engineering-Mechanical Engineering
CiteScore
3.40
自引率
10.50%
发文量
326
审稿时长
12 weeks
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