Analysis of numerical instability of centrifugal pumps operational characteristics

• Autorzy: Lipej Andrej

Identyfikatory

DOI

10.30464/jmee.2020.4.4.357

• Języki publikacji: EN

Abstrakty

EN

In recent years, computational fluid dynamics has been increasingly used in the development of various types of rotating machines. In the case of water turbines and pumps, a large number of researches have been published recently, related to the use of different numerical methods for prediction of efficiency, cavitation characteristics and different dynamic phenomena. For basic analysis an accurate result near the optimal operating regime is sufficient, but for detailed analysis the numerical analyses in the wider field of operating conditions are necessary. Thus, some otherwise known physical phenomena that occur in the part-load and full-load regime may be encountered. In these areas, due to the nature of the flow, various non-stationary phenomena occur that are dominant for such operating regimes. This paper presents the problems that arise if only stationary results are taken into account, and some recommendations for avoiding subsequent problems in the operation of centrifugal pumps.

Słowa kluczowe

EN

centrifugal pump; convergence; numerical analysis; pump characteristics

PL

pompa odśrodkowa; konwergencja; analiza numeryczna; charakterystyka pompy

• Wydawca: Wydawnictwo Uczelniane Politechniki Koszalińskiej
• Czasopismo: Journal of Mechanical and Energy Engineering
• Rocznik: 2020
• Tom: Vol. 4, No 4
• Strony: 357--364
• Opis fizyczny: Bibliogr. 15 poz., rys., wykr.

Twórcy

autor

Lipej Andrej

• Faculty of Mechanical Engineering, University of Novo Mesto, Na Loko 2, 8000 Novo mesto, Slovenia

Bibliografia

• 1. Lipej, A. and Mitruševski, D., (2016), Numerical Prediction of Inlet Recirculationin Pumps, International Journal of Fluid Machinery and Systems IJFMS Vol. 9, No. 3, July-September 2016. https://doi.org/10.5293/IJFMS.2016.9.3.277
• 2. Veselý, J., Půlpitel, L. and Troubil, P., (2005), Model Research of Rotating Stallon Pump Turbines. HYDRO 2005, Villach.
• 3. Lipej, A., Mitrusevski, D. and Zafosnik, B., (2016), Energetic, structural, thermal and fatigue analysis of heavy duty process pumps, IOP Conference Series: Earth and Environmental Science, Volume 49, Issue 7.
• 4. Ješe, U., Novotný, V. and Skoták, A., (2018), Development Trends in the Field of Reversible PumpTurbines – Study of Pumping and Generating Mode Off-design Conditions. 29th IAHR Symposium, Kyoto.
• 5. doi:10.1088/17551315/240/8/082009
• 6. Zhang, X., Burgstaller, R., Lai, X., Gehrer, A., Kefalas, A.and Pang, Y., (2016), Experimental and Numerical Analysis of Performance Discontinuity of a Pump-Turbine under Pumping Mode, IOP Conf. Series: Earth and Environmental Science 49, 042003.
• 7. doi:10.1088/1755-1315/49/4/042003
• 8. Stelzer, R. S. and Walters, R. N., (1977), Estimating Reversible Pump-Turbine Characteristics, A Water Resources Technical Publication, Engineering Monograph No. 39, United States Department of the Interior Bureau of Reclamation.
• 9. Lipej, A., Muhič, S. and Mitruševski, D., (2017), Wall Roughness Influence on the Efficiency Characteristics of Centrifugal Pump, Strojniški vestnik - Journal of Mechanical Engineering 63 (2017) 9, 529-536.
• 10. DOI:10.5545/sv-jme.2017.4526
• 11. Lipej, A., Muhič, S., and Mitruševski, D., (2019), Wall roughness influence on the NPSH characteristics of centrifugal pumps, IOP Conf. Series: Earth and Environmental Science 240 (2019) 032019.
• 12. doi:10.1088/1755-1315/240/3/032019
• 13. Jacquet, C., Fortes-Patella, R., Balarac, L. and Houdeline, J.-B., (2016), CFD Investigation of Complex Phenomena in S-Shape Region of Reversible Pump-Turbine, IOP Conference Series: Earth and Environmental Science, Volume 49, Issue 4, November 2016. doi:10.1088/1755-1315/49/4/042010
• 14. Zheng, X. Q., Wang, Y., Gui Z. H. and Du, Y. N., (2018), Study on internal flow field simulation accuracy of centrifugal impellers based on different meshing types, IOP Conf. Series: Earth and Environmental Science 163 (2018) 012019. doi :10.1088/1755-1315/163/1/012019
• 15. Wang, C., Zhang, Y. X., Zhang, J. Y., Li, Z. W. and Xu, A., (2019), Comparative research on various turbulence closure models for unsteady cavitation flows in the ultra-low specific speed centrifugal pump, IOP Conf. Series: Earth and Environmental Science 240 (2019) 062038. doi:10.1088/1755-1315/240/6/062038

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).