Hydraulic optimization of inlet and outlet passages of vertical mixed flow pumping station
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Abstract:
In order to obtain the optimal design scheme of the inlet and outlet passages of a large vertical mixed flow pumping station, the numerical simulation of the flow pattern in the inlet and outlet passages is carried out using the CFX software. Based on the preliminary design scheme of the inlet and outlet passages of the pumping station, the inlet passage optimization scheme is obtained by adjusting the section parameters of the inlet passage. The optimum design scheme is determined by changing the rising and falling angles of the siphon outlet passages. The final results show that: when the relationship between the inlet passage flow velocity and the length of the passage, the section area and the length of the passage is smooth and there is no sudden change, indicating that it meets the optimization design requirements, likewise, the rising angle of the outlet passage is 22 degrees and the falling angle is 29 degrees, respectively, the velocity distribution of the outlet passage is more uniform and the hydraulic loss is the smallest . T he results obtained can be used to guide the passage optimization of large and medium-sized pumping stations.