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首页> 外文期刊>International Journal of Heat and Mass Transfer >Interfacial area transport of vertical upward bubbly two-phase flow in an annulus
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Interfacial area transport of vertical upward bubbly two-phase flow in an annulus

机译：环空中垂直向上气泡状两相流的界面区域传输

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摘要

In relation to the development of the interfacial area transport equation in a subcooled boiling flow, the one-dimensional interfacial area transport equation was evaluated by the data taken in the hydrodynamic separate effect tests without phase change, or an adiabatic air-water bubbly flow in a vertical annulus. The annulus channel consisted of an inner rod with a diameter of 19.1 mm and an outer round tube with an inner diameter of 38.1 mm, and the hydraulic equivalent diameter was 19.1 mm. Twenty data sets consisting of five void fractions, about 0.050, 0.10, 0.15, 0.20, and 0.25, and four superficial liquid velocities, 0.272, 0.516, 1.03, and 2.08 m/s were used for the evaluation of the one-dimensional interfacial area transport equation. The one-dimensional interfacial area transport equation agreed with the data with an average relative deviation of ±8.96%. Sensitivity analysis was also performed to investigate the effect of the initial bubble size on the interfacial area transport. It was shown that the dominant mechanism of the interfacial area transport was strongly dependent on the initial bubble size.
机译：关于过冷沸腾流中界面面积输运方程式的发展，一维界面面积输运方程式是通过在没有相变或绝热空气-水气泡流的流体动力独立效应试验中获得的数据来评估的。垂直环。环形通道由直径为19.1mm的内杆和直径为38.1mm的外圆管组成，水力当量直径为19.1mm。用于评估一维界面面积的二十个数据集由五个孔隙率（约0.050、0.10、0.15、0.20和0.25）和四个表观液体速度（0.272、0.516、1.03和2.08 m / s）组成。运输方程。一维界面面积传输方程与数据一致，平均相对偏差为±8.96％。还进行了敏感性分析，以研究初始气泡大小对界面区域传输的影响。结果表明，界面区域传输的主要机制在很大程度上取决于初始气泡的大小。

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