Based on the needs of the reconstruction of the tubular pump station of the Xicheng Canal Reconstruction Project, a three-dimensional steady numerical simulation is carried out for the prototype of the two-way shaft tubular pump device. By taking the shaft flow channel of pump station as the research object, five different types of shaft flow channel optimization schemes are analyzed and compared, and the characteristics of the internal flow field of the shaft flow channel during forward and reverse operation are analyzed. The results show that: by moving the shaft section forward, changing the sharp angle of the water front of the shaft to a circular arc, and using the area of each section as a control parameter to improve the area of the section with poor flow distribution can help the water flow to diffuse smoothly and improve hydraulic performance. After optimization, in the forward running state, the efficiency is 72.40% under the design flow conditions (H=3.81 m, Q=30 m3/s). And when H=2.61 m and Q=33 m3/s, the efficiency reaches a maximum of 74.53%. In the reverse running state, when H=3.9 m and Q=30 m3/s, the efficiency reaches a maximum of 60.91%, which is 1.04% higher than the original design.
Key words
flow channel of shaft tubular pump station /
numerical simulation /
optimized design
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