Study on Bionic Shark Fin Blade Design and Hydrodynamic Performance of Horizontal Axis Tidal Current Turbine Abstract In recent years,the exploitation of tidal current energy is drawing more and more attention.As a common device used to capture the energy,the turbine can convert the tidal energy into the mechanical energy of the running blades,then into the electric energy of the dynamo.Being the crucial part to capture energy of the turbine,its property will directly determine the efficiency of the energy capture of the turbine, besides,the airfoil is the basic component of blade,as a result choosing airfoil is of great importance in the study of energy capture.Basing on the copying technology of the turbine,this thesis takes its root in bionics,aiming to apply the excellent hydrodynamic performance of the shark fin to the design of bionic blade and combinational blade,with an expectation to improve the turbine's performance. This thesis takes the shark fin as its sample to imitate its airfoil,applying reverse engineering technology in the process of the three-dimension scanning of the point cloud data,thus acquiring the structural surface of the shark's pectoral and caudal fins, and after that airfoils of different positions was proportionally intercepted through Solid Works,and through the selection of the airfoils of high lift-to-drag ratio and high torque coefficient by Profili,the optimal bionic blade and combinational blade was acquired.Then basing on the processes of the parameter optimization of blade and coordinate transforming by Matlab and combining the blade-momentum theory, and the Wilson blade design theory,the bionic blade and combinational blade are created and the model of bionic shark fin turbine is built. Numerical Simulation studies the performance of turbine from the point of simulation.This thesis adopts the method of CFD,whose process includes mesh generation,calculate solution and post process.Mesh generation adopts Gambit and sets fluid domain and rotating domain according to the requirements while calculate solution and postprocess apply the professional fluid analysis software-Fluent in their 万方数据Study on Bionic Shark Fin Blade Design and Hydrodynamic Performance of Horizontal Axis Tidal Current Turbine Abstract In recent years，the exploitation oftidal current energy is drawing more and more attention．As a common device used to capture the energy,the turbine can convert the tidal energy into the mechanical energy of the running blades，then into the electric energy of the dynamo．Being the crucial part to capture energy of the turbine，its property will directly determine the efficiency of the energy capture of the turbine， besides，the airfoil is the basic component of blade，as a result choosing airfoil is of great importance in the study of energy capture．Basing on the copying technology of the turbine，this thesis takes its root in bionics，aiming to apply the excellent hydrodynamic performance of the shark fin to the design of bionic blade and combinational blade，with an expectation to improve the turbine’S performance． This thesis takes the shark fin as its sample to imitate its airfoil，applying reverse engineering techno logy in the process of the three-dimension scanning of the point cloud data,thus acquiring the structural surface of the shark’S pectoral and caudal fms， and after that airfoils of different positions was proportionally intercepted through Solid Works，and through the selection of the airfoils of high lift-to-drag ratio and high torque coefficient by Profili，the optimal bionic blade and combinational blade was acquired．Then basing on the processes of the parameter optimization of blade and coordinate transforming by Matlab and combining the blade-momentum theory， and the Wilson blade design theory,the bionic blade and combinational blade are created and the model of bionic shark fin turbine iS built． Numerical Simulation studies the performance of turbine from the point of simulation．This thesis adopts the method of CFD，whose process includes mesh generation,calculate solution and post process．Mesh generation adopts Gambit and sets fluid domain and rotating domain according to the requirements while calculate solution and postprocess apply the professional fluid analysis software．Fluent in their 万方数据