Design And Performance Analysis Of The Wave Glider

As a new concept of marine craft,Wave Glider has attracted attentions from the scholars around the world in recent years.Wave Glider has a very broad application prospect.As the presence of waves,wave motion can be transformed directly into the Wave Glider's forward movement.Therefore,a Wave Glider can achieve the unlimited long-distance and long-time voyage in the waves without external energy.The structural characteristics of the Wave Glider is designed and optimized in this thesis.On account of the characteristics of the oscillating foil when the Wave Glider is heaving,based on the DFBI module in STARCCM+,the passive oscillating process of foil is simulated when it is forced to heave.The effects of foil angle limit,wave heights and wave frequencies on the thrust coefficient of NACA0012 foil are investigated.The simulation results show that the passive rotation method can effectively simulate the hydrofoil oscillation process.Meanwhile,based on the numerical calculations,a conclusion has been made that the thrust coefficient increases with the increase of the wave heights and wave frequencies in a certain region.In the meantime,this paper establishes a serial hydrofoil swing models based on the motion simulation of an isolated hydrofoil,discusses the hydrodynamic performance of the serial hydrofoil,and makes the comparison between the hydrodynamic performance of each hydrofoil and a single hydrofoil.Moreover,further researches are conducted to calculate and optimize the research on the angle limit of the hydrofoil.The dynamic model of the twin-hull structure of the Wave Glider is established by SIMULINK in MATLAB and the mechanics of motion are also explored systematically.This thesis provides some references for propulsive performance and hydrodynamic performance of the Wave Glider under different states of the sea.