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Numerical Analysis of Hydrodynamics for Bionic Oscillating Hydrofoil Based on Panel Method.
Gang Xue1, Yanjun Liu1, Muqun Zhang1
1Key Laboratory of High Efficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, No. 17923, Jingshi Road, Jinan, Shandong 250061, China.
This study introduces a bionic fish model using Slender-Body theory and the Panel method for accurate hydrodynamic analysis. The research reveals the significant impact of the caudal fin and phase angle on fish swimming performance.
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Area of Science:
- Fluid dynamics
- Bionics
- Robotics
Background:
- Fish swimming mechanisms are complex and not fully understood.
- Bionic approaches offer insights into aquatic locomotion.
- Accurate hydrodynamic modeling is crucial for understanding fish movement.
Purpose of the Study:
- To develop a novel kinematics model for bionic fish swimming.
- To analyze the hydrodynamic performance of flexible fish-like structures.
- To investigate the influence of caudal fins and phase angles on swimming efficiency.
Main Methods:
- Slender-Body theory for kinematics modeling.
- Panel method for hydrodynamic performance analysis.
- Gauss-Seidel method for solving Navier-Stokes equations.
- Rapid prototyping for physical model creation.
Main Results:
- The proposed model shows good agreement with commercial software (Fluent) and experimental data.
- The caudal fin significantly influences trailing vortex shedding.
- Phase angle is identified as a key factor in hydrodynamic performance.
- Trailing vortex shapes align with theoretical assumptions under specific conditions.
Conclusions:
- The numerical analysis provides valuable insights into fish swimming mechanisms.
- The bionic model accurately simulates flexible fish deformation during swimming.
- This research advances the understanding of fluid-structure interaction in aquatic locomotion.

