By means of numerical simulation and experimental verification, this article investigates the hydraulic performance and\npressure fluctuation of a tank-style axial-flow pump device. With orthogonal test, 16 schemes are designed concerning\nthe different flow conditions of the inlet and outlet passages, and simulated calculations are done; then the non-steady\nnumerical simulation of pressure fluctuation is carried out for the optimized pump device; a model test finally verifies\nthe reliability of the simulated numerical values of the optimized scheme. The results show that using the orthogonal\ntest, an optimized scheme of the inlet and outlet passages can be obtained; compared with the initial scheme, the optimized\none reduces the hydraulic loss by 1.3 cm in the inlet passage and 7.96 cm in the outlet passage; numerical simulation\nwitnesses the highest pump operating efficiency of 70.04%, efficiency of 66.82% with the design head of 1.36m, and\nthe corresponding flow of 34.31m3/s; the model test verifies all the simulated values of the optimized scheme with the\nhighest pump operating efficiency reaching 71.5% and the test efficiency arriving at about 64% when the design head is\n1.36 m. Meanwhile, the highest pressure fluctuation appears at the entrance of the impeller; the main frequency of the\nimpeller and guide vane pressure fluctuation is 5Hz depending on the frequency of the blade. This study offers reference\nfor similar pump station project.
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