Applications of different vortex identification methods in cavitation of a self-priming pump

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 3, 2025

To investigate the internal flow mechanisms during cavitation in self-priming pumps, this study employs numerical simulations based on RNG k-ε turbulence model coupled with Schnerr–Sauer model. The vapor–liquid two-phase characteristics at critical condition are analyzed under various rates and rotational speeds. Based vorticity method, Q criterion, λ2 Δ λci Ω predictions comparative analyses of vortex structures pumps have been conducted. Additionally, energy loss regions pump before after onset has using theory entropy production. results demonstrate that criterion yield consistent identification outcomes across different regions. In contrast, produce more fragmented vortices, most notably gas–liquid separation chamber area, whereas method is susceptible to disturbances from strong shear layers; Energy losses not directly related but show a significant correlation intensity; Changes rate greatest impact average production reflux hole region, particularly high conditions; difference impeller largest occurs; When coefficient constant, vapor volume fraction region exhibits positive both speed.

Language: Английский

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Cavitation suppression and energy performance improvement for a mixed flow pump through controllable velocity moment

Journal of Hydrodynamics, Journal Year: 2025, Volume and Issue: unknown

Published: March 12, 2025

Language: Английский

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Experimental novel investigation of diagnostics cavitation in axial pump using vibration and acoustic measurements based on CWT and FFT analyses approaches

Applied Acoustics, Journal Year: 2025, Volume and Issue: 236, P. 110758 - 110758

Published: April 25, 2025

Language: Английский

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Multi-Condition Hydraulic Performance Enhancement for a Mixed Flow Pump through Improved AIGV

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 136319 - 136319

Published: April 1, 2025

Language: Английский

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Method of Bionic Fish Scale Structure on Pressure Fluctuation Suppression of a Centrifugal Pump

Journal of Marine Science and Application, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Language: Английский

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