The external characteristic test of centrifugal pump was carried out on the closed test bench of centrifugal pump, and the non-constant value simulation of the low-ratio speed centrifugal pump was carried out, and the simulation value matched the test value well, and the reliability of numerical simulation was verified. The hollowing test of centrifugal pump was carried out at the point of design flow Q-8.6m3/h, and the airing performance simulation curve was basically consistent with the trend of the test curve, and the feasibility of the hollowing model was verified.
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