Analysis Of Aerodynamics Characteristics Of MW Grade Wind Turbine Blades

With the increasing scarcity of oil resources, global countries develop therenewable energy as an important national strategy to deploy. And the Japanesenuclear power plant accident in2011makes the solar, wind and otherclean-renewable energy become the focus of attention once again. Our countryplanning to wind power installed capacity reached100million kilowatts in2015and180million kilowatts in2020. Blades are the main components of wind turbine, Itsabout20%of the total cost of wind turbines, and requirements in the outdoorenvironment to run20years, a rotation of nearly108times. its aerodynamiccharacteristics and mechanical properties of material quality directly related to thewind generator whether can stable and efficient operation.This article is a subproject of the National Natural Science Foundation for"megawatt-class wind turbine blade dynamic characteristics of the life prediction(51065026)", its aim is to determine the aerodynamic characteristics of large-scalewind turbine during operation, get the blade load data for the optimization of thefollow-up machine designed. Details are as follows:First, with ANSYS-DM software, establishing two-dimensional model of the windturbine blade section airfoil; selecting experimental parameters; comparing andanalyzing the results of airfoil characteristics at high Reynolds number turbulencemodel simulation; choosing surface pressure distribution calculation model whichbetter reflect the airfoil around flow field.Secondly, with ANSYS-FLUENT software, use the selected computational fluiddynamics model to simulate the situation of the flow leaves airflow around flowpattern and surface pressure distribution of megawatt-class wind turbine during theprocess of operation that different incoming flow and different initial installation angle, and analyzing the variation of the aerodynamic characteristics and causes.Finally, with GH-BLADE software to solve the aerodynamic loads of the windturbine in a particular condition, and take this data as a reference, comparing andanalyzing the differences and similarities of the proceeds of the blade surfacepressure load solved by FLUENT software, verifying the correctness of the MW-classwind blade aerodynamic characteristics by the use of computational fluid dynamicssimulation.This article set up the three-dimensional solid model and computational fluiddynamics model; simulated the aerodynamic properties of the megawatt-class windturbine during operation; and obtained the load data of the wind turbine duringoperation. Lay the foundation of the follow-up complete wind generators optimaldesign and research on control strategy in the process of operation, which is of greatsignificance to improve the operation of the machine stability and the whole life.