Numerical Simulation of Guide Plate Influence on Flow Field in the Oxidation Ditch
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-e 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.