Researsh On The Aerodynamic Performance Of Rotor For Horizontal Axls Wind Turbine

With the development of economy and rise of the people living standard, the growingenergy demand and environmental stress makes people start to look for clean andrenewable energy. Wind energy as a representative of the clean energy for manyadvantages to the attention of the countries all over the world. Using wind turbine togenerate power is the main use form of wind, blades are the key components of windturbine, the pros and cons of blade aerodynamic shape design will have a great influenceon efficiency and service life of wind turbine, So carrying out the research on blade designtechnology is adapt to the current development trend, which has great significance to thedevelopment of wind power industry in our country.Taking10kW wind turbine as an example for the blade shape design and rotoraerodynamic numerical simulation calculation, the main work includes:The paper studies the aerodynamic theory about wind turbine design, combines withWilson design method to establish blade optimization design model,and calculates byMatlab tools to solve the axial induced factor a and circumferential inducing factor b;Chooses the best Angle in Profili software, correct the chord length, torsion angle,eventually get blade parameters. Combining with the principle of coordinatetransformation, convert the blade airfoil2d coordinates into3d coordinates in Excel.Adopt Gambit software to establish solid model of the wind turbine blades and rotor.Using CFD software to numerical simulation of the aerodynamic performance for thewind turbine under rated and several other conditions, select the SST turbulence model.Observed and analyzed the pressure distribution on the surface of the blade, the change ofthe velocity vector and the pressure at different section of the blade. Through observingand analyzing the clouds of pressure and speed which lie before and after rotor rotatingplane, we can see the stress of each part and the mutual influence between blades whenrotor spinning, so as to provide valuable reference basis for blade design. Calculated thepower and wind energy utilization coefficient by rotor torque and compared with thedesigned value, the results verify the design is reasonable.