Hydrodynamic Optimization Design of Underwater Glider Wings Based on Biomimetic Principles

This paper designs a bionic sea turtle fin, which mimics the shape of the sea turtle's forelimbs and maintains an overall streamlined shape to reduce the resistance received by the outer side of the fin. This is of great significance and practical value for exploring new underwater propulsion methods and enriching and improving underwater propulsion technology. In terms of shape design, this paper uses Solid Works software to design the shape according to the contour of the sea turtle's forelimbs, and based on bionic principles, analyzes the flapping motion rules and propulsion mechanism of the sea turtle. To verify that the efficiency of the biomimetic turtle hydrofoil traction machine is higher than that of traditional traction machines, this study focuses on the optimization of the external shape configuration. The Flow Simulation plugin within the Solid Works software is applied to perform computational fluid dynamics CFD) simulations on the biomimetic turtle hydrofoil traction machine. Analyze the impact of different distances and different pitch angles between the fins on the motion performance; set the calculation domain, boundary conditions, residuals, inlet velocity, and sea conditions, etc., and perform simulation experiments on the bionic sea turtle fin tractors with different distances and different angles; analyze the obtained velocity cloud diagram and pressure cloud diagram. The results show that the ocean current resistance received by the bionic sea turtle fin tractor is significantly less than that of the traditional tractor, which verifies the feasibility of the bionic fin and its good application prospects.