The phase distribution of gas-liquid two-phase flow in microimpacting T-junctions with different branch channel diameters
The phase distribution of gas-liquid two-phase flow in microimpacting T-junctions with different branch channel diameters
复制标题
不同分支通道直径微冲击T型接头内气液两相流的相分布
DOI：
10.1016/j.cej.2017.09.136
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发表时间：
2018
影响因子：
15.1
通讯作者：
Wang Shuangfeng
中科院分区：
文献类型：
--
作者：
Sun Wanchun;Liu Yanchu;He Kui;Wang Shuangfeng
进行了实验研究，研究分支通道直径对水平微冲击 T 形接头中两相流的相分布行为的影响。入口通道的横截面为1000μm×500μm，分支通道的横截面分别为400μm×500μm、600μm×500μm、800μm×500μm。选择 120 kPa (abs) 和 25 °C 的氮气和纯水作为工作流体。使用高速记录摄像机来阐明测试段中气液两相流的流体动力学。结合上述实验结果和可视化数据，分析了微冲击T形接头中气液两相流的受力机理。为了更好地应用微冲击T型接头，引入分离效率来评价分离效果。研究发现，随着分支通道直径的减小，可以很好地提高相分布的均匀性。对段塞流和环空流的影响程度（I）大于对段塞流和环空流的影响程度。此外，当入口为段塞流或环空流时，影响程度（I）随着两相空塔速度的增加而减小。
An experimental investigation was conducted to study the effect of branch channel diameters on phase distribution behaviors of the two-phase flow in horizontal microimpacting T-junctions. The cross-section of the inlet channel was 1000 μm × 500 μm and the cross-sections of the branch channels were 400 μm × 500 μm, 600 μm × 500 μm, 800 μm × 500 μm, respectively. Nitrogen and pure water at 120 kPa (abs) and 25 °C were selected as the working fluids. A high speed recording camera was used to clarify the fluid dynamics of the gas–liquid two-phase flow in the test section. Combining above experimental results with the visualization data, the force mechanism of gas–liquid two-phase flow in microimpacting T-junction was analyzed. For the better application of microimpacting T-junctions, the separation efficiency was introduced to evaluate the separation effect. It was found that the uniformity of the phase distribution can be well improved with the decrease of the branch channel diameters. The influencing degree (I) on slug-annular flow was larger than that on slug flow and annular flow. Furthermore, the influencing degree (I) decreased as the superficial velocities of two phases increased when inlet was slug flow or annular flow.