Control mechanisms of different bionic structures for hydrofoil cavitation

Yang, Qi; Li, Deyou; Xiao, Tinglan; Chang, Hong; Fu, Xiaolong; Wang, Hongjie

doi:10.1016/j.ultsonch.2023.106745

Ultrasonics Sonochemistry

2024

DOI: 10.1016/j.ultsonch.2023.106745

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Control mechanisms of different bionic structures for hydrofoil cavitation

Qi Yang,

Deyou Li,

Tinglan Xiao

et al.

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2024

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Cited by 5 publications

References 45 publications

(48 reference statements)

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Cavitation morphology and erosion on hydrofoil with slits

Qiu,

Xu,

Zhu

et al. 2024

International Journal of Mechanical Sciences

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Cavitation morphology and erosion on hydrofoil with slits

Qiu,

Xu,

Zhu

et al. 2024

International Journal of Mechanical Sciences

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Numerical investigation of cavity dynamics and cavitation-induced vibrations of a flexible hydrofoil

Xu,

Zhang,

Liu

et al. 2024

International Journal of Fluid Engineering

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This work investigates the cavitation and fluid–structure interaction characteristics of a flexible NACA0015 hydrofoil. The simulation incorporates the Zwart–Gerber–Belamri cavitation model and two-way fluid–structure interactions. The detached eddy simulation method is employed to analyze the impact of cavitation and elastic deformation on hydrodynamic performance. The vibrational response and cavitating flow field around the hydrofoil are investigated. The results show that the vibrational mode of the elastic hydrofoil shifts with increasing flow speed. Furthermore, the vertical vibrational displacement of the hydrofoil aligns with the variations in cavitation volume in the flow field. The structural vibrational deformation of an elastic hydrofoil notably affects the evolution of cavitation. Additionally, fluid–structure interaction in the presence of cavitation influences the pattern of vortex shedding wakes in the flow field. The results of this study can serve as a reference for the design of hydrofoils constructed from composite elastic materials.

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Investigation of the decisive factor for the effectiveness of biomimetic protuberances during the stall process

Chang,

Li,

Wei

et al. 2024

Physics of Fluids

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This study investigates the influence of leading-edge protuberances (LEP) on the stall process of airfoils to identify the decisive factor in the effectiveness of LEPs. Owing to its clearly defined three-dimensional structure, an LEP introduces uncertainties into its effects on the stall angle of attack and the lift coefficient curve. This poses a challenge for several airfoils when universal stall control strategies are adopted. These problems were studied by classifying 12 symmetrical baseline airfoil types based on their blade thicknesses under the condition of Re = 180 000. These include thin airfoil stalls (TS), leading-edge stalls (LS), and a combination of leading-edge and trailing-edge stalls (CS). Two representative airfoils from each category were selected to study single-protuberance airfoils. The distribution of the suction surface momentum and evolution of the spanwise vortices revealed that the streamwise vortices induced by the LEP resulted in an attached flow. However, the impact of these flow patterns varies depending on the type of airfoil used. The TS and LS airfoils experienced an increase in the stall angle and maximum lift coefficient, resulting in an overall improvement in the airfoil performance. The CS airfoils are the most heavily influenced, experiencing a decrease in the maximum lift coefficient and exhibiting phenomena such as a one-sided stall and step-by-step stall. Finally, this paper proposes for the first time that the main factor influencing the different effects of protuberances is the stall type of the airfoil. This new knowledge can serve as a valuable reference for the implementation of protuberances in practical mechanical applications.

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Control mechanisms of different bionic structures for hydrofoil cavitation

Cited by 5 publications

References 45 publications

Cavitation morphology and erosion on hydrofoil with slits

Cavitation morphology and erosion on hydrofoil with slits

Numerical investigation of cavity dynamics and cavitation-induced vibrations of a flexible hydrofoil

Investigation of the decisive factor for the effectiveness of biomimetic protuberances during the stall process

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