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首页> 外文期刊>Annals of nuclear energy >Experimentally investigating bubble dynamics and pressure drop for bubbly upflow in a vertical annular channel
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Experimentally investigating bubble dynamics and pressure drop for bubbly upflow in a vertical annular channel

机译：实验研究垂直环形通道中的气泡溢出的气泡动力学和压降

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This paper experimentally investigates the bubble characteristics for a bubbly upflow in an annular channel using two-sensor probes and the high-speed camera. The measured parameters include the radial distributions of void fraction, interfacial area concentration, and bubble size. The present measured results are also compared with those from the previous work, confirming the reasonability of present data for the bubbly flow. A simplified two-phase frictional pressure-drop model is proposed to estimate the frictional pressure-drop across the annular channel for the bubbly upflow. Based on comparison with the measured data, the deviation in the two-phase frictional pressure-drop predicted by this simplified model is within 40%. In addition to providing the understanding of bubble dynamics in an annular geometry, the present measured data can also help develop and assess the CFD two-phase model. (c) 2021 Elsevier Ltd. All rights reserved.
机译：本文使用双传感器探针和高速相机通过实验研究了环形通道中的气泡上流的气泡特性。 测量的参数包括空隙部分，界面区域浓度和气泡尺寸的径向分布。 与前一项工作的那些相比，目前的测量结果与上述工作的那些相比，确认存在泡沫流动的现有数据的合理性。 提出了一种简化的两相摩擦压降模型，以估计用于气泡溢出的环形通道的摩擦压力下降。 基于与测量数据的比较，通过该简化模型预测的两相摩擦压降的偏差在40％以内。 除了在环形几何形状中提供对气泡动力学的理解之外，本测量的数据还可以帮助开发和评估CFD两相模型。 （c）2021 elestvier有限公司保留所有权利。

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