Investigation on Fluid Flow inside a Continuous Slab Casting Mold Using Particle Image Velocimetry
Investigation on Fluid Flow inside a Continuous Slab Casting Mold Using Particle Image Velocimetry
复制标题
使用粒子图像测速技术研究连续板坯铸造结晶器内的流体流动
DOI：
10.1002/srin.201900209
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发表时间：
2019-07-30
影响因子：
2.2
通讯作者：
Yang, Jichun
中科院分区：
文献类型：
--
作者：
Ren, Lei;Ren, Ying;Yang, Jichun
本文采用四分之一比例水模型研究了宽板坯结晶器内的全区域（未将结晶器分成几个部分）流体流动。采用粒子图像测速技术（PIV）对流动的湍流特性进行了分析。这些特征包括瞬时速度场、时均速度场、湍流脉动速度场、湍流动能及其耗散率、应变率和涡量的分布。有几个？在这项研究中，即使浸入式水口严格对中，结晶器内的流体流动也不一定是对称的，但其时均流动结构是对称的。结晶器下部湍流发展比较充分，流速大，TKE及其耗散率也大。正值和负值区域表示流体旋转的方向，在SEN的两侧具有镜像。高涡度区域靠近射流，并且随着射流进一步流入结晶器而减小。
Herein, full region (not divided the mold into several parts) fluid flow in a wide slab mold is studied using a one-quarter scale water model. The particle image velocimetry (PIV) is used to analyze the turbulent features of the flows. The features include the distribution of instantaneous velocity fields, time-averaged velocity fields, turbulent fluctuation velocity fields, the turbulent kinetic energy (TKE) and its dissipation rate, rate of strain, and the vorticity. There are several ?ndings in this study. The fluid flow in the mold is not always symmetrical even the submerged entry nozzle (SEN) is strictly centered, but the time-averaged flow structure is symmetric flow. The development of turbulence is relatively sufficient in the lower part of the mold, where the flow velocity is large, and the TKE and its dissipation rate are also large. Regions of positive and negative values signify the direction of the flow rotation with mirror images on both sides of the SEN. The regions of high vorticity are close to jets and decrease as it flows further into the mold.