2023
DOI: 10.1063/5.0133948
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Effect of inlet leakage flow on the instability in a radial vaneless diffuser

Abstract: The internal flow structures in a vaneless diffuser of a radial pump are experimentally and numerically investigated. Numerical simulations are used for investigating the prominent features of the fluid flow in the vaneless diffuser upon a change of the flow rate and of the impeller-to-diffuser radial gap. Comparisons between experimental and numerical results on the overall pump and diffuser performances are presented and discussed. The influence of inlet diffuser leakages on the development of flow instabili… Show more

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Cited by 8 publications
(13 citation statements)
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“…URANS simulations were run for 70 revolutions of the impeller, and all URANS results presented in the paper are either from the last time step or a phase average of the last impeller revolution. For more details of the numerical settings, refer to Fan et al [14].…”
Section: Methodsmentioning
confidence: 99%
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“…URANS simulations were run for 70 revolutions of the impeller, and all URANS results presented in the paper are either from the last time step or a phase average of the last impeller revolution. For more details of the numerical settings, refer to Fan et al [14].…”
Section: Methodsmentioning
confidence: 99%
“…As an extended study that originated in the LMFL laboratory. A detailed experimental database is available to the authors thanks to our previous studies [15] and is here used for the validation of numerical results. The numerical results of the positive-leakage case using 2.3M cells mesh are firstly validated against the experimental results since this geometrical configuration of our simulations is the closest to the experimental set-up.…”
Section: Validation Of the Numerical Methodsmentioning
confidence: 99%
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“…В подальшому розроблено наближений розв'язувач Рімана [14] для надзвукових течій й проведено його валідації для такого типу течій та у порівнянні з комерційними програмами [15,16]. Зазначено, що результати отримані в Openfoam, можуть бути використані для моделювання надзвукових течій у турбомашинах [17]. Якісний розрахунок течії й особливо розподілів температур на лопатях турбін та компресорів дозволяє збільшити надійність машин та збільшити міжремонтні інтервали [18,19]…”
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