以空气和水为工质,应用高速摄影仪,对3.25 mm×43 mm的竖直和倾斜窄矩形通道的弹状流进行了可视化研究.按分液相雷诺数将流动分为层流区(Re lo<3000)和湍流区(Re lo≥3000).实验结果表明,在层流区,气弹上升速度随倾斜角度的增加而增大;在湍流区,倾斜角度对气弹上升速度的影响不明显.基于湍流区拟合得到的分布参数C0和班可夫系数C A分别为1.151和0.788,与实验数据具有较好的一致性.对于空泡份额Jones-Zuber模型和Ishii模型,在湍流区两者预测结果与实验基本一致,但在层流区,Jones-Zuber模型预测效果较好而Ishii模型偏差较大.%Visualized investigation was performed with a high-speed camera to study the characteristics of slug flow in a narrow rectangular channel with a cross section of 3.25 mm×43 mm under vertical and inclined conditions. Air and water were used as the test fluids. The flow regime was divided into laminar flow region (Relo<3000) and turbulent flow region (Relo≥3000) based on the liquid Reynolds number. The experimental result shows that bubble rising velocity increases with the increase of the inclined angle in the laminar flow region, but it nearly keeps constant in the turbulent flow region. The fitted distribution parameter C0 and Bankoff coefficient CA for the turbulent flow region are 1.151 and 0.788 respectively, which are in good agreement with the experimental data. Both of the Jones-Zuber and Ishii void fraction models have good agreement with experimental data in the turbulent flow region. The Jones-Zuber model predicts the experimental data well for the laminar flow region, while the Ishii model shows a large deviation.
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