Multi-dimensional characteristics of upward bubbly flows in a vertical large-size square channel
Multi-dimensional characteristics of upward bubbly flows in a vertical large-size square channel
复制标题
垂直大尺寸方形通道内向上气泡流动的多维特征
DOI：
10.1016/j.ijheatmasstransfer.2023.124214
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发表时间：
2023
影响因子：
5.2
通讯作者：
Hibiki Takashi
中科院分区：
文献类型：
--
作者：
Sun Haomin;Kunugi Tomoaki;Yokomine Takehiko;Shen Xiuzhong;Hibiki Takashi
在具有传热传质过程的工程系统中，各种流道中经常出现气液两相流。通道几何形状通常会影响热流体行为。对圆形和环形通道内的气液两相流进行了广泛的研究，拥有丰富的局部两相流测量数据。方形通道用于各种工程学科，但通过局部流动参数测量对方形通道中的两相流进行的实验研究非常有限。对于方形通道中的两相流分析，了解流动特性以及针对一些关键参数（例如漂移通量参数和界面面积浓度）进行模型验证至关重要。向上气泡流实验是在内部横截面为 0.136 × 0.136 m 的大方形通道中进行的。使用四传感器光学探头和热膜风速计测量三个轴向位置的八分圆对称三角形横截面中 66 个点的局部两相流参数。测量的两相流参数是空隙率、轴向气体速度、轴向液体速度、界面面积浓度和气泡索特平均直径。根据当地测量数据研究了流动发展的流动特性。本地测量数据通过其定义直接确定了漂移磁通参数。通过实验确定的分布参数可以通过大型圆形管道的现有相关性来重现，这表明大型方形通道中的流动特性可能与大型圆形管道中的流动特性相似。根据现有的大型圆形管道的漂移-通量相关性，可以合理地预测当前实验中的空隙率。此外，可以通过现有的相关性以合理的精度预测界面面积浓度。
Gas-liquid two-phase flows frequently occur in various flow channels in engineering systems with heat and mass transport processes. The channel geometry affects thermo-fluid behavior generally. Extensive research is done on gas-liquid two-phase flows in circular and annular channels with a wealth of local two-phase flow measurement data. Square channels are used in various engineering disciplines, but there has only been limited experimental research on two-phase flows in square channels with local flow parameter measurements. For two-phase flow analyses in square channels, knowledge of the flow characteristics and model validation against some key parameters, such as the drift-flux parameters and the interfacial area concentration, is crucial. An experiment for upward bubbly flows was conducted in a large square channel with an inside cross-section of 0.136 × 0.136 m. A four-sensor optical probe and a hot-film anemometer were used to measure local two-phase flow parameters at 66 points in an octant symmetric triangular cross-section at three axial locations. The measured two-phase flow parameters were the void fraction, axial gas velocity, axial liquid velocity, interfacial area concentration, and bubble Sauter mean diameter. The flow characteristics through flow development were investigated based on the local measurement data. The local measurement data directly determined the drift-flux parameters through their definitions. The distribution parameters determined through experimentation could be reproduced by the existing correlation for large circular pipes indicating that the flow characteristics in large square channels may be similar to those in large circular pipes. Based on existing drift-flux correlations for large circular pipes, the void fractions in the current experiment could be fairly predicted. Furthermore, the interfacial area concentrations could be predicted by existing correlations with reasonable accuracy.
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影响因子：
4.7
作者：
T. Hibiki;M. Ishii
通讯作者：
T. Hibiki;M. Ishii
大直径管道中气液气泡搅动流动状态的界面面积浓度
DOI：
10.1016/j.ijheatfluidflow.2015.05.002
发表时间：
2015
影响因子：
2.6
作者：
Xiuzhong Shen;T. Hibiki
通讯作者：
T. Hibiki
影响因子：
3.2
作者：
Xiuzhong Shen;Yasushi Saito;K. Mishima;H. Nakamura
通讯作者：
Xiuzhong Shen;Yasushi Saito;K. Mishima;H. Nakamura
不同气体空隙率分布对垂直气泡流中平均含率的影响
影响因子：
3.8
作者：
N. Clark;R. Flemmer
通讯作者：
R. Flemmer
DOI：
10.1615/multscientechn.v6.i1-4.180
发表时间：
1992
期刊：
影响因子：
--
作者：
A. Serizawa;I. Kataoka;I. Michiyoshi
通讯作者：
I. Michiyoshi