ABSTRACT The two-phase flow in helically coiled tubes (HCTs) is rather important in many industries, such as the heat exchange facility in nuclear power plant. In this work, a double-sensor conductivity probe was used to study the air/water bubbly flow in HCTs. The cross-sectional distribution profile of the interfacial parameters (void fraction, interfacial area concentration, bubble size, etc.) of air–water bubbly flow were systematically studied. Through carefully processing the raw data collected by the double-sensor conductivity probe, the distribution of the void fraction, interfacial area concentration, the bubbles number frequency over the cross-section are demonstrated, as well as the bubble velocities and sizes vertically in the dense region. Some statistical parameters of cross-sectional-averaged quantities, coefficients of variation, and bubble aggregation core coordinates are defined to quantitatively describe the distribution characteristics of interfacial parameters. The measured data are helpful for improving the understanding of two-phase flow characteristics in HCTs.

中文翻译：

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使用双传感器电导率探头局部测量螺旋盘管中的气泡流

摘要 螺旋盘管 (HCT) 中的两相流在许多行业中相当重要，例如核电厂的热交换设施。在这项工作中，双传感器电导率探头用于研究 HCT 中的空气/水气泡流。系统地研究了空气-水气泡流界面参数（空隙率、界面面积浓度、气泡大小等）的横截面分布曲线。通过对双传感器电导率探头采集的原始数据进行仔细处理，展示了孔隙率的分布、界面面积浓度、横截面上的气泡数频率以及垂直方向上的气泡速度和尺寸。地区。横截面平均量的一些统计参数，变异系数，定义气泡聚集核心坐标，定量描述界面参数的分布特征。测量数据有助于提高对 HCT 中两相流特性的理解。