Abstract
The submersible mixer as major sewage treatment equipment is very important to sewage treatment plant. The numerical simulation of the internal 3-D incompressible turbulent flow agitated flow field was carried out. By changing some design parameters of mixer impeller, we can analyze the numerical simulation results, they showed that: the impeller produced vortex jet flow, the constant velocity lines advanced as ellipse, the velocities along the centerline are larger than others. For the same impeller diameter, the impeller whose hub-tip ratio is smaller has larger advancing speed in the agitated flow field, and the advancing speed is more evenly distributed, so the overall effect is better. The PEO/E software was applied to design the impeller. Using the results of the optimization design, we can deal with the actual engineering on the design, manufacture and testing of the submersible mixer. The operational results are good, and the benefits of economy and society are remarkable.
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