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Bio-inspired Wing Morphologies for Underwater Gliders: Reducing Wake Instabilities and Resonance Risk

Gazi Arman Hossain, Md Absar Jahan, Nayem Zaman Saimoon, Md. Mahmudul Hasan, Mahadi Hasan Masud
August 2, 2026
Published Date

Research Abstract & Technology Focus

This study investigates the structural response of underwater glider (UWG) wings with various profiles for minimising vortex-induced vibrations (VIVs) and enhancing operational stability. Three wing geometries, a conventional rectangular cross-section (RCS), a NACA 2412 airfoil, and a biomimetic profile inspired by the Green Sea Turtle (GST), were compared through transient computational fluid dynamics (CFD) and modal analysis. Vortex shedding frequencies (VSFs) were determined by Fast Fourier Transform (FFT) of unsteady lift coefficients and compared to natural frequencies corrected for added mass in underwater conditions. The result shows that the GST-inspired wing offers superior stiffness and reduced unsteady loading, while the NACA 2412 and the RCS profiles achieved efficient flow attachment but may be more susceptible to resonance due to closer alignment of VSFs and modal frequencies. Results show that the GST-inspired wing exhibits the largest gap between hydrodynamic and structural frequencies, with around 132.33 Hz difference between its VIV and wet-modal frequencies, compared with 28.14 Hz for the RCS and 108.99 Hz for the NACA 2412. Thus, the GST wing demonstrated sufficient difference between hydrodynamic and structural timescales, minimising resonance risk. These findings demonstrate that the baseline NACA 2412 airfoil and biomimetic-based wing designs are promising for vibration attenuation and increased UWG endurance.
Wing Airfoil Acoustics Wake Resonance (particle physics) Lift (data mining)
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What is the core focus of the research titled 'Bio-inspired Wing Morphologies for Underwater Gliders: Reducing Wake Instabilities and Resonance Risk'?

This literature focuses on: This study investigates the structural response of underwater glider (UWG) wings with various profiles for minimising vortex-induced vibrations (VIVs) and enhancing operational stability. Three wing geometries, a conventional rectangular cross-sec...

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What other academic literature is closely related to 'Bio-inspired Wing Morphologies for Underwater Gliders: Reducing Wake Instabilities and Resonance Risk'?

Yes, highly correlated activity was mapped. An entry titled 'Numerical Investigation of Aerodynamic Characteristics of Biomimetic Wingsails for Unmanned Surface Vehicles' discusses this: The aerodynamic characteristics of wingsails on unmanned surface vessels (USVs) play a crucial role in enhancing propulsion performance. Two-dimens...

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