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Numerical Prediction of Erosive Potential of Unsteady Cavitating Flow around Hydrofoil
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SYSNO ASEP 0439966 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Numerical Prediction of Erosive Potential of Unsteady Cavitating Flow around Hydrofoil Author(s) Sedlář, M. (CZ)
Zima, Patrik (UT-L) RID
Komárek, M. (CZ)Source Title Applied Mechanics and Materials. - Dürnten : Trans Tech Publications Ltd, 2014 - ISSN 1660-9336 - ISBN 978-3-03835-118-4 Pages s. 156-163 Number of pages 8 s. Publication form Print - P Action Aerospace and Mechanical Engineering AME 2014 Event date 13.04.2014-14.04.2014 VEvent location Bangkog Country TH - Thailand Event type WRD Language eng - English Country CH - Switzerland Keywords cavitation erosion ; CFD ; hydraulic machinery Subject RIV BK - Fluid Dynamics R&D Projects GA13-23550S GA ČR - Czech Science Foundation (CSF) Institutional support UT-L - RVO:61388998 EID SCOPUS 84903522365 DOI 10.4028/www.scientific.net/AMM.565.156 Annotation The paper attempts to assess the erosive potential of cavitation bubbles in unsteady flow of liquid over a prismatic hydrofoil using two-way coupling of the URANS and the Rayleigh-Plesset equations. The erosive potential is evaluated from the energy dissipated during the collapses of imploding bubbles near the hydrofoil surface. Bubble fission is modelled using a simple break-up model. The interaction between bubbles is considered by superposing the pressure change due to pressure waves generated by collapsing bubbles and propagated in the computational domain over the local pressure in the liquid. The flow is analysed using the in-house 3D solver for unsteady turbulent flow with bubble dynamics. The results are demonstrated on the NACA 2412 hydrofoil with the incidence angle of 8 degrees and the cavitation number 1.37, which corresponds to the regime of oscillating partial cavity with periodic shedding of bubble cloud downstream of the cavity. 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 2015
Number of the records: 1