中文摘要：

曝气池中气泡羽流在边墙附近的流动特征对污水处理效果的影响至关重要。为了探明曝气池中气泡羽流在附壁效应（Coanda效应）下的偏移规律,在配置有橡胶膜式微孔曝气盘的大型蓄水池中进行了曝气池模型试验。试验中利用针式掺气浓度仪测量得到不同工况下气泡羽流的气含率分布,进而分析得到气泡羽流的倾斜程度。试验结果表明,气泡羽流的倾斜程度主要受曝气盘距边壁的距离以及通气量影响,而与水深的相关关系并不显著。采用量纲分析方法,建立了曝气盘到边壁的距离和通气量对气泡羽流倾斜影响的数学模型。

英文摘要：

Flow behavior of bubble plume rising near the side wall of aeration tank is important to design of sewage treatment. To study the Coanda effect of bubble plume and its inclination near the wall, a model test in a large aeration tank was carried out. Fine gas bubbles were generated by a EDPM membrane diffuser, the distribution of plume gas holdup were measured with a electro-resistivity phase-detection gauge, and by using these distributions the plume inclination under different conditions were obtained. The measurements show that the air flow rate and the distance of bubble-generating diffuser to the wall are major factors determining the near-wall plume inclination, while the water depth in the tank plays little role. A mathematical model for estimation of the effects of these factors was developed using dimensional analysis method.