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Radial Flow pumps only - Affinity laws?

thread407-89859

Radial Flow pumps only - Affinity laws?

Radial Flow pumps only - Affinity laws?

(OP)
The affinity laws for speed change work for all rotodynamic pumps (radial, axial and mixed flow impellers) but for impeller diameter change the laws only apply for radial flow impellers - can anyone tell me why this is the case?

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