CFD analysis of unsteady cavitation phenomena in multistage pump with inducer

0388638 - ÚT 2013 RIV GB eng J - Článek v odborném periodiku
Sedlář, M. - Zima, Patrik - Bajorek, M. - Krátký, T.
CFD analysis of unsteady cavitation phenomena in multistage pump with inducer.
IOP Conference Series. Roč. 15, č. 6 (2012), s. 1-8. ISSN 1755-1315.
[IAHR Symposium on Hydraulic Machinery and Systems /26./. Beijing, 19.08.2012-23.08.2012]
Grant CEP: GA ČR GAP101/10/1428
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: cavitating flow * CFD analysis * erosion risk
Kód oboru RIV: BK - Mechanika tekutin
http://iopscience.iop.org/1755-1315/15/6/062024

The paper presents the numerical simulation of the cavitating flow phenomena in the suction part of a radial-flow multistage water pump with an inducer and a high rotational speed. Besides the cavitation inception and the drop of the pump total head the CFD analysis studies the possibility of the cavitation surge and quantifies the risk of cavitation erosion for different flow conditions. ANSYS CFX was used to solve the URANS equations coupled with the Rayleigh-Plesset Model and the SST-SAS turbulence model. The erosion risk is estimated from the energy dissipated during the collapses of individual bubbles. The cavitation instability in the backflow vortices has been detected at 60% of the optimal flow coefficient close to the NPSHr value.
Trvalý link: http://hdl.handle.net/11104/0217577