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CFD Analysis of Cavitation Erosion Potential in Hydraulic Machinery
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SYSNO ASEP 0330840 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title CFD Analysis of Cavitation Erosion Potential in Hydraulic Machinery Title Výpočetní analýza potenciálu kavitační eroze v hydraulickém stroji Author(s) Sedlář, M. (CZ)
Zima, Patrik (UT-L) RID
Müller, M. (CZ)Source Title Proceedings of the 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems. - Brno : University of Technology, 2009 / Rudolf P. - ISBN 978-80-214-3947-4 Pages s. 205-214 Number of pages 10 s. Publication form CD ROM - CD ROM Action IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems /3./ Event date 14.10.2009-16.10.2009 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CZ - Czech Republic Keywords cavitation erosion ; bubble dynamics ; CFD analysis Subject RIV BK - Fluid Dynamics R&D Projects GA101/07/1612 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation The paper describes a new model for efficient modeling of water cavitation erosion potential in turbulent cavitating flow. The number and size of the cavitation nuclei in the inlet flow are predicted empirically or experimentally using the acoustic spectrometer. The bubble dynamics is described using the Rayleigh-Plesset equation along the flow streamlines obtained from the 3D RANS equations. The model of the erosion potential is based on the estimation of the energy dissipated by the collapses of the cavitating bubbles. The paper also describes the experiment carried out in the cavitation tunnel in the SIGMA R&D Institute. The CFD model is tested for 2D and 3D geometry. It is shown that the erosion potential of the first collapses is several orders higher than the potential of the subsequent collapses. The numerically determined location and magnitude of the first collapses are compared with the photographs of the erosion pattern. The agreement for the tested cases is very good. 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 2010
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