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Numerical Analysis of Unsteady Cavitating Flow around Balancing Drum of Multistage Pump
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SYSNO ASEP 0459136 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Numerical Analysis of Unsteady Cavitating Flow around Balancing Drum of Multistage Pump Author(s) Sedlář, M. (CZ)
Krátký, T. (CZ)
Zima, Patrik (UT-L) RIDNumber of authors 3 Source Title International Journal of Fluid Machinery and Systems - ISSN 1882-9554
Roč. 9, č. 2 (2016), s. 119-128Number of pages 10 s. Publication form Online - E Action Asian International Conference on Fluid Machinery /13./ (AICFM Event date 07.09.2015-10.09.2015 VEvent location Tokyo Country JP - Japan Event type WRD Language eng - English Country KP - Korea Keywords cavitation erosion ; numerical simulation ; multistage pump Subject RIV BK - Fluid Dynamics R&D Projects GA13-23550S GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 DOI 10.5293/IJFMS.2016.9.2.119 Annotation This work presents the numerical investigation of an unsteady cavitating flow around a balancing drum of a multistage pump. The main attention is focused on the cavitation phenomena, which occur in the rear part of the drum clearance, cause the erosion of the drum material and influence the pressure losses and the flow rate through the clearance. The one-way coupling of the URANS equations and the full Rayleigh-Plesset equation is employed to analyse the flow field as well as the dynamics of cavitating bubbles. The numerical simulations show that the erosion processes are highly influenced by shaft vibrations, namely by periodic deformations of the annular clearance in time. The calculated results are verified by erosion tests on a real pump. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2017
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