Numerical Simulation Research On The Flow Around The Sail

This paper relies on the sail-assisted system and performs a relevant analysis for the threedimensional flow of the target sail.This paper firstly introduced the development history of sail-assisted ships and the current research status,and summarized and analyzed the research related to flow around blunt body.The basic principles of computational fluid dynamics were introduced,and the advantages and disadvantages of each turbulence model were analyzed.The SST turbulence model was chosen to carry out the numerical simulation work in this paper.At the same time,the accuracy of the numerical simulation was verified with the help of the well established study of the flow around a cylinder.Subsequently,several three-dimensional sail models were established and threedimensional sail winding simulations were performed under different wind speed,angle of attack,and sail height conditions.The trends of flow,vortex frequency,lift and drag under different conditions were analyzed.Analyze the effects caused by the three-dimensional flow characteristics of the sail.Multiple three-dimensional twin-sail models were built,and their simulation results were compared with those of single-sail simulations to analyze the effects of twin-sail interference on sail flow.The influence of the distance between the twin sails on the effect of twin sail interference was investigated.Finally,the structural model of the sail was established,the natural frequency and vibration shape of the sail were obtained by solving,and the sail load was loaded for related analysis through the coupling method.Under the conditions of various angles of attack,the structural strength analysis obtained the area with greater stress on the sail.Analyze the harmonic response of wind vibration to get the structure frequency response curve.Correlative analysis of structural vibration phenomena was carried out.