Research On Fluid-Structure Interaction Mechanism Of Wind Turbine Blade

With the development of society, the mankind faces the serious exhausted challenge with the problem of being deficient of resource and environmental pollution day by day. Wind energy as an inexhaustible supply of clean energy, will be vigorously developed and utilized. Currently, the main form of wind energy utilization of wind power. To improve aerodynamic performance of wind turbine blade profiles is the key to increase the efficiency of wind turbine and to develop industry of wind energy.With The blade is a key component of wind turbine,it plays an important role in improving the aerodynamic performance of blades, increasing the efficiency of wind turbine,reducing the blade failure to carry out the coupling characteristics of blade and wind.During wind turbine running, aerodynamie, elastic and inertiaload are applied on blade.Furthermore,the structural characterizes of blade are long span,short chord and small stinffess.so futter often occurs to to the blade, which could cause blade damaged. In this paper,the problem of fluid-structure interaction has been studied in-depth,the main contents are as follows:According to the blade airfoil data,using curve fitting method to establish the three-dimensional model of blade.The blade aerodynamic equation has been established,by seleting the turbulence model ofκ-ε,the simulation of flow field has been completed by the finite element software ANSYS.Each modal has been getted through analysising the modal of the blade,it is found that the main type vibration of the blade are reverse,wave,shimmy,and the coupling between the three.The problem of the blade aeroelasticity has been approached,the blade flutter equation has been established,the blade flutter divergence condition has been determined, the curve of the blade tip speed ratio change with the angle of attack has been made.At present, domestic and international scholars study the problem of fluid-structure interaction from the perspective of data exchange, theoretical research in this area is not mature, these studies can improve the aerodynamic performance of wind turbine blades and leaf strength.the research has a certain reference value for the preliminary design.