CFD Simulation With Fluid-Structure Interaction For Aerodynamic Performace Of A 10MW Floating Off-Shore Wind Turbine

With the problems existing in traditional energy,people started to seek for cleaner energy.As one of the cleanest energy,wind energy has been paid more and more attention.There are more and more onshore wind turbines having been used.However,due to the difficult location of the onshore wind turbines,people paid more and more attention to the research of high power floating wind turbine.This paper will take the DTU-10 MW Reference Wind Turbine as the research object and complete the simulation of it by using STAR CCM+.This paper will study the aerodynamic performance of DTU-10 MW Reference Wind Turbine under different wind speed conditions with or without tower.The effect of the platform’s motion and flexible blade considering Fluid structure interaction(FSI)is also studied in this paper.Simulations of DTU-10 MW Reference Wind Turbine using dynamic overset mesh technology are presented.In order to prove the accuracy of overset mesh,the full-scale simulation of DTU-10 MW Reference Wind Turbine is carried out by using overset mesh and sliding mesh.Using unsteady Reynolds-Averaged Navier-Stokes(RANS)and Detached Eddy Simulation(DES)turbulence models to complete simulation,there are significant improvements in the accuracy of DES model than the other.Therefore,the DES turbulent model based on k-ωSST will be used for subsequent simulation.Then,the effect of tower shadow on the performance of wind turbine was studied.It shows that the tower will have significant influence on the performance of wind turbine.The effect of the various oscillation frequencies and amplitudes of the platform surge,heave,and yaw motion have been widely investigated herein.Using overset mesh to realize the motion of platform and using sliding mesh to realize the rotation of the rotor.The result indicates that the trust and the moment of the rotor will change a lot because of the different oscillation frequency and amplitude of the surge and yaw motion.But there is little influence on the heave motion.To study the influence of the flexible blade,Fluid structure interaction(FSI)simulation of the DTU-10 MW Reference Wind Turbine are performed using two separate simulation software: ABAQUS for the finite element analysis of the rotor structure and STAR CCM+ for the analysis of the flow around the turbine.The modal analysis of abaqus case is carried out,and the accuracy of finite element simulation is verified.The simulation of the blade rigid body motion using STAR CCM+ is carried out,and the accuracy of it is verified.Configure the fluid-structure interaction environment between two software and realize the full-size fluid structure interaction of 10 MW wind turbine.The displacement of blade is simulated and the effect of the flexible blade considering Fluid structure interaction(FSI)is also studied.