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Journal of Shanghai University >

2021 , Vol. 27 >Issue 4: 611 - 634

DOI: https://doi.org/10.12066/j.issn.1007-2861.2297

Invited Review

Coupling characteristics between a hydrofoil's cavitation structural evolution and collapse pressure under multiple modes

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  • 1. School of Energy and Power Engineering, University of Shanghai for Science and Technoloy, Shanghai 200093, China
    2. Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China

Received date: 2021-01-15

  Online published: 2021-04-30

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Abstract

Based on a compressible numerical simulation, cavitation flow under different cavitation numbers was calculated. The mechanism of cavity shedding and the processes of collapse and release, propagation, and coupling characteristics of the pressure wave were investigated. The results revealed the following. The numerical model could capture the release, propagation, and rebound of pressure waves during local cavity collapse. There were different cavity shedding and collapse modes under different cavitation numbers. There may be multiple dynamic evolutionary processes in a shedding cycle of a large cavitation structure at a certain cavitation number. The cavity collapse induced by the condensed shock wave had a long duration and exhibited a small pressure-fluctuation amplitude and high release frequency, while the exfoliating large-scale cavity collapse exhibited a rapid, large pressure amplitude and a short action time, which may cause structural vibration and cavitation erosion damage.

Key words： cavitation; cavity structure collapse; pressure wave; evolution of cavity structure; compressible simulation

Cite this article

ZHU Bing, YANG Pu . Coupling characteristics between a hydrofoil's cavitation structural evolution and collapse pressure under multiple modes[J]. Journal of Shanghai University, 2021 , 27(4) : 611 -634 . DOI: 10.12066/j.issn.1007-2861.2297

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