Ships and Offshore Structures· 2026Q2
Hydrodynamic performance and experimental validation of a wire-driven bio-inspired underwater vehicle with fish-like propulsion
- 1citations
- Q2SCImago
- 2026year
Short summary
A 3D CFD model and prototype experiments reveal that increasing oscillation frequency and body-bending amplitude in a wire-driven, fish-like underwater vehicle generally increase forward thrust, with low frequencies producing near-zero or negative thrust.
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Key points
- A 3D CFD model in STAR-CCM+ was used to simulate the hydrodynamic performance of a wire-driven, fish-like underwater vehicle.
- Increasing oscillation frequency and body-bending amplitude generally increased cycle-averaged streamwise force (forward thrust).
- Low-frequency motions resulted in negative or near-zero streamwise force at the reference inflow.
- Straight swimming showed a reverse Kármán vortex street and downstream momentum jet, while turning involved asymmetric wake deflection.
AI-generated from the title and abstract; the full text is not read.
Abstract
Wire-driven bio-inspired underwater vehicles offer low-noise propulsion and maneuverability, but their hydrodynamic behavior remains insufficiently understood. A three-dimensional computational fluid dynamics model was developed in STAR-CCM+ to evaluate straight-swimming and turning performance. Under imposed inflow conditions, oscillation frequency and body-bending amplitude were varied to assess cycle-averaged streamwise force. Asymmetric bias angles were introduced to evaluate side force, yaw moment, and streamwise-force retention. Increasing frequency and amplitude generally increased mean streamwise force, whereas low-frequency motions produced negative or near-zero values at the reference inflow. Straight swimming was associated with a reverse Kármán vortex street and downstream momentum jet; turning involved asymmetric wake deflection and vortex distortion. Still-water prototype experiments confirmed the predicted swimming-speed trends with frequency and amplitude. These findings inform kinematic design and maneuverability improvement for wire-driven underwater vehicles.
The authors' abstract, as published at the source. Ships and Offshore Structures, 2026 · DOI ↗
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Field: Aerospace Engineering
Aerospace EngineeringEngineering