Specific speed
Two-phase flows in pumps Descriptions and consequences
Quizzed article REF: BM4325 V1
Specific speed
Two-phase flows in pumps Descriptions and consequences

Author : Gérard BOIS

Publication date: March 10, 2021, Review date: June 23, 2022 | Lire en français

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1. Specific speed

Pumps operating in single-phase mode, like all rotodynamic machines that convey incompressible fluids, are classified using a parameter called specific angular velocity, noted Ω (or Ω s ), which is usually associated with the specific radius noted Λ (or Λ s ) given below:

Ω=ωqv(gH)3/4
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