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<p>To clarify the evolution mechanism of vortex structures in the cavitating flow of rotating hydrofoils, this study combines experimental measurements on a rotating disk platform with a high-speed acquisition system and validated Large Eddy Simulation (LES) to systematically analyze the vortex hydrodynamic behavior of a NACA0015 hydrofoil in rotating flow fields. Current research lacks a comprehensive understanding of how rotational effects govern vortex dynamics in cavitating flows, and this work fills this critical gap by revealing that centrifugal and Coriolis forces synergistically dictate the generation, evolution and transport of vortex structures. <i>Q</i>-criterion identification demonstrates a strong spatiotemporal correlation between cavitation morphology and vortex evolution, while quantitative analysis of key source terms in the vorticity transport equation further clarifies the physical mechanisms governing vorticity evolution across different cavitation stages. Beyond addressing this core research gap, this work quantifies the stage-dependent dynamic evolution of the contribution weight of each vorticity transport source term, and establishes an experimentally validated LES numerical simulation for cavitating flow around rotating hydrofoils. This research advances the fundamental understanding of cavitation vortex dynamics in rotating hydrofoils, and provides a solid scientific basis for cavitation control and performance optimization of hydraulic machinery.</p>

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Vortex dynamics evolution mechanism of NACA0015 rotating hydrofoil under cavitation conditions: coupling effect of rotational forces and vorticity transport

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • Weiguo Zhao,
  • Jianhui Bao

摘要

To clarify the evolution mechanism of vortex structures in the cavitating flow of rotating hydrofoils, this study combines experimental measurements on a rotating disk platform with a high-speed acquisition system and validated Large Eddy Simulation (LES) to systematically analyze the vortex hydrodynamic behavior of a NACA0015 hydrofoil in rotating flow fields. Current research lacks a comprehensive understanding of how rotational effects govern vortex dynamics in cavitating flows, and this work fills this critical gap by revealing that centrifugal and Coriolis forces synergistically dictate the generation, evolution and transport of vortex structures. Q-criterion identification demonstrates a strong spatiotemporal correlation between cavitation morphology and vortex evolution, while quantitative analysis of key source terms in the vorticity transport equation further clarifies the physical mechanisms governing vorticity evolution across different cavitation stages. Beyond addressing this core research gap, this work quantifies the stage-dependent dynamic evolution of the contribution weight of each vorticity transport source term, and establishes an experimentally validated LES numerical simulation for cavitating flow around rotating hydrofoils. This research advances the fundamental understanding of cavitation vortex dynamics in rotating hydrofoils, and provides a solid scientific basis for cavitation control and performance optimization of hydraulic machinery.