【摘要】 利用Fluent软件对氧化沟流场进行三维数值模拟,采用滑移壁面模型定义转盘转动,Realizable k-ε模型模拟流场湍流变化,并与实测数据拟合验证,再运用验证后的模型对加装导流板前后的深沟型氧化沟进行模拟,得出导流板安装参数变化对氧化沟的影响。结果表明,加装导流板后氧化沟的流场改善明显,沟内中下部液流流速得到改善,减小了污泥淤积的可能。并得出合理的导流板安装参数:导流板板长为水深的1/5;距转盘中心距离为转盘直径的2倍,浸深为曝气转盘浸深的1/6。更多还原

【Abstract】 Fluent software was used to simulate the flow field in the oxidation ditch. The moving wall model was used to simulate the power sources of running plate in the ditch and realizable k-ε model was used to simulate the variation of water. After comparing data with experiment,using the model simulating the flow in the deeper oxidation ditch with installing and uninstalling guide plate,the influence by different installing parameters of guide plate was concluded. Results indicted that the flow in the oxidation ditch can be improved efficiently,velocity of middle pat and underpart increased obviously. It reduced the possibility of sludge sedimentation. The reasonable installing parameters of guide plate were obtained as the length of guide plate 1/5 of the depth of water,2 times distance to the diameter of turnplate,and immersion depth 1/6 of the turnplate.更多还原