Hydrodynamic Investigation of Bionic 2D Rigid Oscillating Hydrofoil Propulsion

摘要

In order to study the performance of biomimetic propulsor,the unsteady hydrodynamic performance of 2D rigid oscillating hydrofoil was calculated numerically by the premise condition of BCF propulsion mode.The 2D oscillating mechanism of the connecting rod between rod and hydrofoil was simulated by FLUENT software.It was the mechanism that the rod drives the hydrofoil and the hydrofoil swung repeatedly.Getting through the comparison between the calculated results and the experimental value,this paper verified the feasibility of the numerical investigation with the dynamic mesh method of Smoothing and Remeshing and the turbulence model k-ε.And the influence factors on unsteady hydrodynamic performance of 2D rigid oscillating hydrofoil was analyzed in detail,which factors were Reynolds number,oscillating frequency,phase difference,the amplitude of hydrofoil and Strouhal number.The paper got the results that was the influence on the average thrust coefficient and the efficiency with the different factors and got the situation of the best average thrust coefficient and the best efficiency.