| Naslov: | Numerical prediction of the NPSH characteristics in centrifugal pumps |
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| Avtorji: | ID Štefanič, Matej (Avtor) |
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| Datoteke: |  https://www.mdpi.com/2311-5521/10/10/274
 RAZ_Stefanic_Matej_2025.pdf (1,73 MB)
MD5: EA6233E775E85853C8EC2DD9E2177552
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Članek v reviji |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | UNM FS - Univerza v Novem mestu - Fakulteta za strojništvo
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| Opis: | This study focuses on the numerical analysis of a centrifugal pump’s suction capability, aiming to reliably predict its suction performance characteristics. The main emphasis of the research was placed on the influence of different turbulence models, the quality of the computational mesh, and the comparison between steady-state and unsteady numerical approaches. The results indicate that steady-state simulations provide an unreliable description of cavitation development, especially at lower flow rates where strong local pressure fluctuations are present. The unsteady k–ω SST model provides the best overall agreement with experimental NPSH3 characteristics, as confirmed by the lowest mean deviation (within the ISO 9906 tolerance band, corresponding to an overall uncertainty of ±5.5%) and by multiple operating points falling entirely within this range. This represents one of the first detailed unsteady CFD verifications of NPSH prediction in centrifugal pumps operating at high rotational speeds (above 2900 rpm), achieving a mean deviation below ±5.5% and demonstrating improved predictive capability compared to conventional steady-state approaches. The analysis also includes an evaluation of the cavitation volume fraction and a depiction of pressure conditions on the impeller as functions of flow rate and inlet pressure. In conclusion, this study highlights the potential of advanced hybrid turbulence models (such as SAS or DES) as a promising direction for future research, which could further improve the prediction of complex cavitation phenomena in centrifugal pumps. |
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| Datum objave: | 01.01.2025 |
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| Leto izida: | 2025 |
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| Št. strani: | str. 1-27 |
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| Številčenje: | Vol. 10, iss. 10, [art. no.] 274 |
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| PID: | 20.500.12556/ReVIS-12559  |
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| UDK: | 621.67:620.193.16 |
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| ISSN pri članku: | 2311-5521 |
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| COBISS.SI-ID: | 256932099 |
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| DOI: | 10.3390/fluids10100274 |
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| Opomba: | Nasl. z nasl. zaslona;
Opis vira z dne 12. 11. 2025;
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| Datum objave v ReVIS: | 12.11.2025 |
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| Število ogledov: | 47 |
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| Število prenosov: | 0 |
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| Metapodatki: |    |
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