Multi-factor orthogonal optimization and experimental performance study of flow passages in a vertical mixed-flow pump unit.

PLoS One · 2026 · PMC13245763 · PMID 42258460

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an unexpected trendno p-value reported

An unexpected trend is observed in Fig 9 for the inlet flow passage: its hydraulic loss first decreases slightly from the lowest flow rate (8.48 m 3 /s) to near the design point (10.6 m 3 /s), and then increases with further flow rate increase.

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an increasing trendno p-value reported

As the flow rate increased, this pre-rotation effect weakened, and the hydraulic loss of the inlet flow passage showed an increasing trend with the flow rate.

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