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首页> 外文期刊>International Journal of Heat and Mass Transfer >Local flow measurements of vertical upward bubbly flow in an annulus
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Local flow measurements of vertical upward bubbly flow in an annulus

机译：环空中垂直向上气泡流的局部流量测量

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摘要

Local measurements of flow parameters were performed for vertical upward bubbly flows in an 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. Double-sensor conductivity probe was used for measuring void fraction, interfacial area concentration, and interfacial velocity, and laser Doppler anemometer was utilized for measuring liquid velocity and turbulence intensity. A total of 20 data sets for void fraction, interfacial area concentration, and interfacial velocity were acquired 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. A total of eight data sets for liquid velocity and turbulence intensity were acquired consisting of two void fractions, about 0.050, and 0.10, and four superficial liquid velocities, 0.272, 0.516, 1.03, and 2.08 m/s. The constitutive equations for distribution parameter and drift velocity in the drift-flux model, and the semi-theoretical correlation for Sauter mean diameter namely interfacial area concentration, which were proposed previously, were validated by local flow parameters obtained in the experiment using the annulus.
机译：对环形空间中的垂直向上气泡流进行流量参数的局部测量。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。双传感器电导率探针用于测量空隙率，界面面积浓度和界面速度，激光多普勒风速计用于测量液体速度和湍流强度。总共获得了20个关于空隙率，界面面积浓度和界面速度的数据集，其中包括五个空隙率（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。总共获得了八个液体速度和湍流强度数据集，其中包括两个空隙率（约0.050和0.10）和四个表观液体速度（0.272、0.516、1.03和2.08 m / s）。先前提出的漂移-通量模型中分布参数和漂移速度的本构方程，以及苏特平均直径的半理论相关性，即界面面积浓度，通过使用环空实验获得的局部流动参数得到验证。

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